{"product_id":"aluminium-coping-corner-135-degree","title":"2mm Aluminium Sloping Coping – 135° External Corner | 125mm External Leg","description":"\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eExternal angled parapet corners are easy to underestimate until water starts finding the weakest joint. A poorly cut corner can leave exposed edges, uneven sealant lines, staining on the wall face and a roofline that looks improvised instead of professionally finished.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThat matters on UK buildings where coping has to deal with driving rain, frost cycles, coastal winds and regular temperature movement. Whether the job is a modern extension in Chelmsford, a commercial unit in Basildon, a housing development near Colchester or an angled roof terrace in East London, the outside corner needs to look clean and protect the wall head properly.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThis 2mm aluminium sloping coping external corner is made for 135 degree outward parapet junctions where two coping runs meet around an angled outside corner. It gives the detail a formed, purpose-made piece instead of relying on two site-cut lengths meeting at a vulnerable point.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eIt is designed to work as part of an \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-sloping-coping\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium sloping coping\u003c\/span\u003e\u003c\/a\u003e system, with a 125mm external leg for deeper face coverage on medium to larger wall heads. Online Metal Store Ltd supplies this product from Chelmsford, Essex, with size options from 185mm to 885mm and powder coating in any RAL colour to match the wider roofline package.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eFor a complete run, this corner can be specified alongside matching \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-copings\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium copings\u003c\/span\u003e\u003c\/a\u003e, stopends, sealant and colour matched fixings. That keeps the profile, finish and installation detail consistent across the full parapet rather than mixing parts from different systems.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eKey Benefits\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003ePurpose-Made for 135 Degree External Corners\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eA factory formed 135 degree external corner gives an angled parapet return a cleaner and more reliable junction than a rushed site cut. It helps the installer create a neat corner line, reduce exposed edges and avoid the patched appearance that can happen when straight lengths are forced to do a specialist corner job.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eBetter Protection in UK Weather\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThe sloped profile helps move water away from the wall head, while the aluminium construction resists corrosion in damp, exposed and changeable conditions. That is especially useful on flat roof edges, garden walls and commercial parapets where rain can sit around corners if the detail is not planned properly.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003e125mm External Leg for Deeper Coverage\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThe 125mm external leg gives more visible face coverage than shorter-leg options, which can be helpful on thicker parapet walls or projects where the designer wants a stronger roofline detail. It also helps the corner feel balanced when used with matching coping lengths across wider wall heads.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003ePowder Coated in Any RAL Colour\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThe corner can be powder coated in any RAL colour, so the finish can match windows, fascias, cladding, rainwater goods or existing project specifications. This is useful on residential work where the client wants a neat finish and on commercial buildings where colour consistency matters across the elevation.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eLightweight and Easier to Handle on Site\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eAluminium gives good strength without the weight of heavier materials. That makes the corner easier to handle, position and fit at roof level, especially when access is limited or the installer is working around parapets, terraces, scaffolding or finished facade surfaces.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eUK Manufactured with Fast Delivery\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThe product is manufactured in Chelmsford, Essex, which supports better control over sizing, finish and lead times. For roofers, contractors and builders working across Essex, Kent, London, the South East and wider UK, that helps reduce delays when a coping run needs matching corners to complete the job properly.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eProduct type: \u003c\/b\u003eAluminium sloping coping 135 degree external corner\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eMaterial: \u003c\/b\u003eAluminium\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eThickness: \u003c\/b\u003e2mm\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eCorner angle: \u003c\/b\u003e135 degree external corner\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eExternal leg: \u003c\/b\u003e125mm\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eAvailable widths: \u003c\/b\u003e185mm, 210mm, 235mm, 260mm, 285mm, 310mm, 335mm, 360mm, 385mm, 410mm, 435mm, 460mm, 485mm, 510mm, 535mm, 560mm, 585mm, 610mm, 635mm, 660mm, 685mm, 710mm, 735mm, 760mm, 785mm, 810mm, 835mm, 860mm and 885mm\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eFinish: \u003c\/b\u003ePowder coated in selected RAL colour\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003ePrice shown on live page: \u003c\/b\u003eFrom £59.04 ex VAT, £70.85 inc VAT\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eManufacturing location: \u003c\/b\u003eChelmsford, Essex, United Kingdom\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eBest suited for: \u003c\/b\u003eAngled external parapet corners, roof edge returns, wall heads and coping systems that need a formed 135 degree outside corner\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003eReturn status: \u003c\/b\u003eCustom fabricated item, non-returnable unless faulty\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eChoosing the Right Size \/ Width \/ Thickness\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThe width should be selected to suit the full wall build-up, not just the visible brick or block measurement. Allow for the wall width, waterproofing build-up, insulation line where relevant, finish tolerances and the way the coping needs to sit over the top of the wall.\u003c\/p\u003e\n\u003cp style=\"mso-add-space: auto; text-indent: -.25in; line-height: 15.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo1; tab-stops: list .25in; margin: 0in 0in 8.0pt .25in;\" class=\"MsoListBullet\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e·\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e         \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eUse narrower widths, such as 185mm to 285mm, for slim parapet walls, small boundary walls and compact domestic extensions where the wall build-up is modest.\u003c\/p\u003e\n\u003cp style=\"mso-add-space: auto; text-indent: -.25in; line-height: 15.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo1; tab-stops: list .25in; margin: 0in 0in 8.0pt .25in;\" class=\"MsoListBullet\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e·\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e         \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eUse mid-range widths, such as 310mm to 510mm, for many residential parapets, garage roof edges, Edwardian semis, Victorian terraces and standard flat roof extensions.\u003c\/p\u003e\n\u003cp style=\"mso-add-space: auto; text-indent: -.25in; line-height: 15.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo1; tab-stops: list .25in; margin: 0in 0in 8.0pt .25in;\" class=\"MsoListBullet\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e·\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e         \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eUse wider options, such as 535mm to 885mm, for thicker wall heads, commercial units, schools, care homes and projects with insulation, render or cladding build-up around the parapet.\u003c\/p\u003e\n\u003cp style=\"mso-add-space: auto; text-indent: -.25in; line-height: 15.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo1; tab-stops: list .25in; margin: 0in 0in 8.0pt .25in;\" class=\"MsoListBullet\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e·\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e         \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eChoose this 125mm external leg when the outside face needs deeper coverage, stronger visual definition or better alignment with deeper matching coping lengths.\u003c\/p\u003e\n\u003cp style=\"mso-add-space: auto; text-indent: -.25in; line-height: 15.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo1; tab-stops: list .25in; margin: 0in 0in 8.0pt .25in;\" class=\"MsoListBullet\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e·\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e         \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eCheck the angle before ordering. A 135 degree external corner is for an outward angled return, not a square 90 degree corner or an inward corner.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eHow to Install \/ How to Fit\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eStart by checking the parapet is sound, clean, level and ready to receive the coping system. The waterproofing should be turned and detailed correctly before the metalwork is installed, because the coping is there to protect and finish the wall head rather than hide a poor substrate.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eDry-fit the 135 degree external corner first, then offer up the adjoining coping lengths so the joint line, overhang and slope direction are correct. If the system needs sealing at the junction, use \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/colour-coded-sealant-300ml\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecolour coded sealant\u003c\/span\u003e\u003c\/a\u003e to help keep the finish neat and matched to the selected RAL colour.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eFixing should follow the project detail and the selected substrate. Use suitable \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/timber-fasteners-ral\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecolour coded timber fasteners\u003c\/span\u003e\u003c\/a\u003e or \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/metal-fasteners-ral-pack-25\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecolour coded metal fasteners\u003c\/span\u003e\u003c\/a\u003e where visible fixings are part of the installation approach, making sure fixings are set out cleanly and do not compromise waterproofing beneath.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eWhere the corner meets flashings, trims or other roof edge items, coordinate it with the wider \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/collections\/trims-flashings-angles-1\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003etrims, flashings and angles\u003c\/span\u003e\u003c\/a\u003e package. On exposed buildings in places such as Southend, Kent or East London, take extra care with sealant continuity and water shedding direction around the external return.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eWhere Aluminium Coping External Corner 125mm Is Used\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eAngled Parapet Walls on Flat Roofs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThis corner is used where a flat roof parapet turns through a 135 degree external angle. It helps the \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-copings\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium copings\u003c\/span\u003e\u003c\/a\u003e run continue around the outside return without leaving a weak corner detail exposed to rain.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eModern Domestic Extensions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eOn extensions in Chelmsford, Billericay, Brentwood and the Home Counties, angled parapets are often used to suit plot shape, glazed openings or planning constraints. A formed external corner keeps the roofline tidy and avoids a rough join where the design is meant to look clean and modern.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eCommercial Units and Retail Buildings\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eCommercial roof edges often have longer coping runs, exposed elevations and more visible corner details. A 135 degree external corner gives the outside return a professional finish, especially where customers, tenants or maintenance teams will see the parapet from ground level.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eRendered Walls and Clad Facades\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eRendered elevations, cladding panels and facade upgrades need neat metal edges to avoid staining and awkward junctions. This corner can work alongside \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/aluminium-roof-flashing-3000mm\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium roof flashing\u003c\/span\u003e\u003c\/a\u003e where the wall head and roof edge details need to be coordinated.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eHigher Specification Roofline Packages\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eFor projects where appearance matters, such as offices, schools, care homes and architect-led homes, the corner helps the coping system look like one planned package. The \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-coping-case-study\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecoping case study\u003c\/span\u003e\u003c\/a\u003e can also support trust by showing how aluminium coping details are used on real UK projects.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e \u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003e\u003cspan style=\"font-size: 11.5pt; mso-bidi-font-size: 11.0pt; color: #2c3e50;\"\u003eWhat is a 135 degree external aluminium coping corner?\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eA 135 degree external aluminium coping corner is a pre-formed corner piece used where two coping runs meet around an angled outside parapet return. It helps protect the wall head, keeps the roofline clean and reduces the need to cut and form a difficult angled joint on site.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003e\u003cspan style=\"font-size: 11.5pt; mso-bidi-font-size: 11.0pt; color: #2c3e50;\"\u003eDo I need an external corner or an internal corner?\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eYou need an external corner when the coping turns around an outside angle of the building or wall. You need an internal corner when the coping turns into an inside angle. If you are standing outside the wall and the corner projects outwards, this product is usually the correct style.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003e\u003cspan style=\"font-size: 11.5pt; mso-bidi-font-size: 11.0pt; color: #2c3e50;\"\u003eHow do I choose the correct width?\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eMeasure the full wall build-up, including the wall, finishes and any waterproofing or insulation allowances. The corner should match the width of the coping lengths used on the same run, so the overhang, slope and joint detail stay consistent around the parapet.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003e\u003cspan style=\"font-size: 11.5pt; mso-bidi-font-size: 11.0pt; color: #2c3e50;\"\u003eCan this coping corner be powder coated to match the rest of the roofline?\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eYes, this product is available with powder coating in a selected RAL colour. That means it can be matched with coping lengths, stopends, fascias, windows, doors, cladding or rainwater goods for a cleaner architectural finish.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003e\u003cspan style=\"font-size: 11.5pt; mso-bidi-font-size: 11.0pt; color: #2c3e50;\"\u003eIs it better to use a formed corner instead of cutting two coping lengths?\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eA formed corner is usually better for a neat, repeatable and more controlled finish. Cutting two straight lengths on site can work in some situations, but it often creates more risk around exposed edges, uneven joints and sealant lines, especially on visible or weather-exposed parapets.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003cb style=\"mso-bidi-font-weight: normal;\"\u003e\u003cspan style=\"font-size: 11.5pt; mso-bidi-font-size: 11.0pt; color: #2c3e50;\"\u003eDoes the corner still need sealant?\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eMost coping systems still need careful sealing at joints and interfaces. A formed corner improves the shape and finish of the junction, but the installer should still follow the correct fixing and sealing detail, using compatible sealant and allowing for movement where needed.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eComparison Section\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eAluminium 135 Degree External Corner\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThe aluminium external corner is the best choice when the project needs a clean, lightweight and corrosion-resistant finish around an angled outside parapet return. It suits modern residential and commercial buildings where the coping system must look precise and perform in wet UK conditions.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eSite-Cut Coping Lengths\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eCutting straight coping lengths on site can sometimes be used on low-visibility or budget-led work, but it relies heavily on installer skill and creates more room for small gaps or uneven joints. It can also make powder coated edges harder to protect if cuts are exposed or poorly finished.\u003c\/p\u003e\n\u003ch3 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eLead or Traditional Metal Detailing\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eLead and other traditional materials still have a place on listed buildings, heritage properties and projects where conservation officers require a specific appearance. For most modern parapet and flat roof edge work, powder coated aluminium gives a cleaner look, lower weight and strong colour matching options.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eFor a full roof edge package, link this product back to the \u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-copings\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium copings\u003c\/span\u003e\u003c\/a\u003e collection so buyers can choose straight lengths, corners, stopends and matching accessories together.\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003ePart of a Complete System\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eThis product should be treated as part of a complete coping system rather than a standalone detail. Ordering the full system together helps improve colour consistency, profile alignment and installation planning.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-sloping-coping\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium sloping coping\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/pages\/aluminium-flat-copings\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ealuminium flat copings\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/aluminium-coping-corner-90-inward\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003e90 degree internal corner\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/aluminium-coping-corner-135-intern\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003e135 degree internal corner\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/aluminium-coping-stopend-100mm\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003eright handed stopend\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/aluminium-coping-stopend-left-100\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003eleft handed stopend\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/colour-coded-sealant-300ml\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecolour coded sealant\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/timber-fasteners-ral\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecolour coded timber fasteners\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/products\/metal-fasteners-ral-pack-25\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003ecolour coded metal fasteners\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/onlinemetalstore.co.uk\/collections\/roof-accessories\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003eroof accessories\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\"\u003e\u003cspan style=\"font-family: 'Arial',sans-serif; mso-fareast-font-family: Arial; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;\"\u003eStandards and Compliance\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eFlat roof parapet detailing should be considered in the context of \u003ca rel=\"noopener\" href=\"https:\/\/knowledge.bsigroup.com\/products\/flat-roofs-with-continuously-supported-flexible-waterproof-coverings-code-of-practice-1\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003eBS 6229:2025\u003c\/span\u003e\u003c\/a\u003e, which covers the design, construction, care and maintenance of flat roofs with continuously supported flexible waterproof coverings. Getting the parapet and coping interface right helps protect the roof, the wall below and the people inside the building.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8.0pt; line-height: 15.0pt; mso-line-height-rule: exactly;\" class=\"MsoNormal\"\u003eFor powder coated architectural aluminium, \u003ca rel=\"noopener\" href=\"https:\/\/knowledge.bsigroup.com\/products\/paints-and-varnishes-coating-of-aluminium-and-aluminium-alloys-for-architectural-purposes-coatings-prepared-from-thermosetting-coating-powder\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003eBS EN 12206-1:2021\u003c\/span\u003e\u003c\/a\u003e is the relevant coating standard to reference for aluminium and aluminium alloys prepared with thermosetting coating powder. On new-build projects, check the current \u003ca rel=\"noopener\" href=\"https:\/\/www.nhbc.co.uk\/standards\" target=\"_blank\"\u003e\u003cspan style=\"color: #2e75b6;\"\u003eNHBC Standards\u003c\/span\u003e\u003c\/a\u003e and project specification so the coping detail supports warranty expectations rather than becoming a weak point.\u003c\/p\u003e","brand":"Online Metal Store Ltd","offers":[{"title":"185mm","offer_id":42314524229716,"sku":"AC2-E135-125-185","price":59.04,"currency_code":"GBP","in_stock":true},{"title":"210mm","offer_id":42314524262484,"sku":"AC2-E135-125-210","price":61.56,"currency_code":"GBP","in_stock":true},{"title":"235mm","offer_id":42314524295252,"sku":"AC2-E135-125-235","price":64.08,"currency_code":"GBP","in_stock":true},{"title":"260mm","offer_id":42314524328020,"sku":"AC2-E135-125-260","price":66.6,"currency_code":"GBP","in_stock":true},{"title":"285mm","offer_id":42314524360788,"sku":"AC2-E135-125-285","price":69.12,"currency_code":"GBP","in_stock":true},{"title":"310mm","offer_id":42314524393556,"sku":"AC2-E135-125-310","price":71.64,"currency_code":"GBP","in_stock":true},{"title":"335mm","offer_id":42314524426324,"sku":"AC2-E135-125-335","price":74.16,"currency_code":"GBP","in_stock":true},{"title":"360mm","offer_id":42314524459092,"sku":"AC2-E135-125-360","price":76.68,"currency_code":"GBP","in_stock":true},{"title":"385mm","offer_id":42314524491860,"sku":"AC2-E135-125-385","price":79.2,"currency_code":"GBP","in_stock":true},{"title":"410mm","offer_id":42314524524628,"sku":"AC2-E135-125-410","price":81.72,"currency_code":"GBP","in_stock":true},{"title":"435mm","offer_id":42314524557396,"sku":"AC2-E135-125-435","price":84.24,"currency_code":"GBP","in_stock":true},{"title":"460mm","offer_id":42314524590164,"sku":"AC2-E135-125-460","price":86.76,"currency_code":"GBP","in_stock":true},{"title":"485mm","offer_id":42314524622932,"sku":"AC2-E135-125-485","price":89.28,"currency_code":"GBP","in_stock":true},{"title":"510mm","offer_id":42314524655700,"sku":"AC2-E135-125-510","price":91.8,"currency_code":"GBP","in_stock":true},{"title":"535mm","offer_id":42314524688468,"sku":"AC2-E135-125-535","price":94.32,"currency_code":"GBP","in_stock":true},{"title":"560mm","offer_id":42314524721236,"sku":"AC2-E135-125-560","price":96.84,"currency_code":"GBP","in_stock":true},{"title":"585mm","offer_id":42314524754004,"sku":"AC2-E135-125-585","price":99.36,"currency_code":"GBP","in_stock":true},{"title":"610mm","offer_id":42314524786772,"sku":"AC2-E135-125-610","price":101.88,"currency_code":"GBP","in_stock":true},{"title":"635mm","offer_id":42314524819540,"sku":"AC2-E135-125-635","price":104.4,"currency_code":"GBP","in_stock":true},{"title":"660mm","offer_id":42314524852308,"sku":"AC2-E135-125-660","price":106.92,"currency_code":"GBP","in_stock":true},{"title":"685mm","offer_id":42314524885076,"sku":"AC2-E135-125-685","price":109.44,"currency_code":"GBP","in_stock":true},{"title":"710mm","offer_id":42314524917844,"sku":"AC2-E135-125-710","price":111.96,"currency_code":"GBP","in_stock":true},{"title":"735mm","offer_id":42314524950612,"sku":"AC2-E135-125-735","price":114.48,"currency_code":"GBP","in_stock":true},{"title":"760mm","offer_id":42314524983380,"sku":"AC2-E135-125-760","price":117.0,"currency_code":"GBP","in_stock":true},{"title":"785mm","offer_id":42314525016148,"sku":"AC2-E135-125-785","price":119.52,"currency_code":"GBP","in_stock":true},{"title":"810mm","offer_id":42314525048916,"sku":"AC2-E135-125-810","price":122.04,"currency_code":"GBP","in_stock":true},{"title":"835mm","offer_id":42314525081684,"sku":"AC2-E135-125-835","price":124.56,"currency_code":"GBP","in_stock":true},{"title":"860mm","offer_id":42314525114452,"sku":"AC2-E135-125-860","price":127.08,"currency_code":"GBP","in_stock":true},{"title":"885mm","offer_id":42314525147220,"sku":"AC2-E135-125-885","price":129.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/1588\/2580\/files\/Aluminium_20Coping_20-_20100mm_20-_20125mm_20External_20Leg_20-_20135-Degree_20External_20Corner.png?v=1774517080","url":"https:\/\/onlinemetalstore.co.uk\/products\/aluminium-coping-corner-135-degree","provider":"Online Metal Store Ltd","version":"1.0","type":"link"}