2mm Aluminium Sloping Coping – 2m Length | 100mm External Leg - Online Metal Store Ltd

2mm Aluminium Sloping Coping – 2m Length | 100mm External Leg

£59.90
(£71.88 Inc VAT)

2mm Aluminium Sloping Coping – 2m Length | 100mm External Leg

Every joint in a coping run is a sealant line that needs to perform for the lifetime of the installation. A joint between two lengths is not a failure point on a correctly installed and sealed system, but it is a dependency: the sealant must be applied correctly, must remain flexible across years of thermal cycling, and must not fail under sustained wind-driven rain on an exposed parapet face. Fewer joints means fewer dependencies. The 2m length halves the joint count compared with 1m sections on the same run and produces a cleaner continuous coping line across medium parapet spans that the 3m length would overshoot. On a 4m box dormer front parapet, two 2m lengths give you one joint and no waste. On a 6m rear extension parapet, three 2m lengths give you two joints and no waste. On a 5m run, a 3m and a 2m give you one joint and a minimal cut.

This is the 2mm aluminium sloping coping in a 2m length with a 100mm external leg. It carries the same built-in slope, the same 29 available width sizes, and the same system compatibility as the 1m length and the 3m length in the same range. Manufactured in Chelmsford, Essex, powder coated in any RAL colour, made to order and non-returnable unless faulty.

The Case for the 2m Length: When It Outperforms Both Alternatives

Medium Parapet Runs: 2m to 5m

On a parapet run between 2m and 5m long, the 2m section is often the most efficient single-length choice. A 4m run needs exactly two 2m sections with one joint and no waste. A 4.5m run needs two 2m sections plus a 500mm cut from a third section one joint with a short infill cut. Ordering two 3m lengths for the same 4m run wastes 2m of made-to-order material. Ordering four 1m lengths creates three joints where one is sufficient. The 2m section is the economical and practical choice for medium runs in this range.

Box Dormers and Prominent Front Parapets

Box dormers on terraced and semi-detached houses across Essex, East London and the wider South East commonly have a front parapet between 1.8m and 3.5m wide. A single 2m section covers the full front face of most standard box dormers with either no cut or a minimal trim at one end. The front parapet of a box dormer is frequently the most visible face of the coping installation seen from the street, often at close range from the pavement. A single 2m section with no mid-face joint gives the cleanest possible result on this high-visibility detail.

Infill Within a 3m-Dominant Installation

On longer parapet runs where 3m lengths cover the bulk of the distance, the 2m section handles infill positions where the remaining run length sits between 1m and 3m. A run of 11m, for example, divides into three 3m lengths plus a 2m infill four lengths, three joints, and no waste from the infill piece. A 1m section plus a cut would also work but adds an unnecessary joint and wastes cut material. The 2m infill is the cleaner solution on most medium-to-long runs.

Reducing Joint Count on Multi-Section Parapets

On a parapet with four faces and a total perimeter of 20m, the joint count depends entirely on the length mix. Four 3m sections per face (where the face length allows) gives a very low joint count. Where face lengths do not divide neatly into 3m sections, substituting 2m sections for 1m infill pieces halves the joint count at those positions without changing the material cost significantly. On a project where quality of finish matters at every elevation, planning the run with 2m sections as the preferred infill choice over 1m is good installation practice.

Product Overview

This 2m length is part of the Online Metal Store Ltd 2mm aluminium sloping coping system with a 100mm external leg, fabricated at the Chelmsford facility. The 2mm gauge with a 100mm external leg is the standard domestic and light commercial specification for sloping coping across the UK. The built-in slope tilts toward the external face so rainwater drains actively off the coping surface. The 100mm external leg provides the overhang and drip detail; the 75mm internal leg returns down the inside face of the parapet. The 29 available width sizes from 185mm to 885mm cover domestic and light commercial parapet wall widths. The 4mm aluminium coping bracket is the correct concealed fixing bracket for this 2mm system.

This 2m section is compatible with every accessory in the 2mm sloping coping 100mm system: the 1m lengths and 3m lengths in the same profile, all four corner types, left and right handed stopends, stopend upstands, and the 4mm bracket. All components are powder coated in any RAL colour and share the same profile dimensions across the range.

Key Benefits

Two Metres, One Joint, Better Efficiency on Medium Runs

The 2m length provides twice the coverage per joint compared with a 1m section. On a 4m parapet face, two 2m lengths give one joint; four 1m lengths give three joints. Each additional joint is an additional sealant application, an additional potential failure point, and an additional visual line in the installed coping surface. Reducing joint count on visible parapet faces, particularly where the coping is prominent from the street or from adjacent properties, is a straightforward quality improvement that costs nothing in material terms when the 2m length fits the run.

Built-In Slope for Active Surface Drainage

The sloped top surface of this 2m coping section tilts toward the external face, directing rainwater off the coping and over the drip edge rather than allowing it to sit level on the profile. This drainage function is the primary reason sloping coping is specified over flat coping on residential parapet walls across the South East. On a box dormer front parapet or a rear extension parapet facing the prevailing weather, active surface drainage from a well-specified slope is a long-term maintenance advantage that flat coping cannot replicate.

100mm External Leg for Balanced Domestic Overhang

The 100mm external leg provides the correct overhang and drip detail for most domestic parapet wall widths. It is proportionally well-scaled against single-skin and standard cavity wall parapets up to around 200-250mm wide. For wider walls where a more substantial overhang is appropriate, the 125mm external leg system is available in the same 2m length profile from the same Chelmsford range.

Powder Coated in Any RAL Colour, Not Anodised

The finish on every component in the 2mm sloping coping range, including this 2m length, is an external grade polyester powder coat available in any RAL colour. These products are not anodised. The current product page contains multiple incorrect references to anodising processes and anodising finishes that must be removed: they are factually wrong and do not apply to this product. Ordering this 2m section in the same RAL colour as the 1m infill sections, corners and stopends for the same project ensures everything is finished in the same batch at Chelmsford and arrives colour-matched.

Concealed Bracket Fixing, Clean Installed Surface

The 4mm aluminium coping bracket is fixed to the wall top before the coping is installed. The 2m coping section presses down onto the brackets from above. No fastener penetrates the top or face surface of the installed coping. The result is a clean, unbroken coping surface across the full 2m section with no visible hardware, the same concealed result as any other length in the system.

UK Manufactured in Chelmsford, Made to Order

Fabricated at the Online Metal Store Ltd facility in Chelmsford, Essex, to the width size and RAL colour specified at order. As with all components in the sloping coping range, this is a custom-fabricated non-returnable product. The size calculation guide below is essential reading before ordering: the 29 "sizes" refer to the coping width, not the run length, and the correct size must be calculated from the wall width before placing the order.

Technical Specifications

Material: 2mm grade aluminium

Profile: Sloping coping length

Length: 2m (2000mm)

External Leg: 100mm

Internal Leg: 75mm

Width Sizes Available: 185mm, 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, 885mm (29 sizes in 25mm increments)

Size Note: The "size" refers to the overall WIDTH of the coping profile, NOT the run length. All lengths on this page are 2m long. The size determines the coping girth to match your wall width. Formula: wall width + 195mm = size to order.

Finish: Polyester powder coating, external grade, NOT anodised

Colour: Any RAL colour to order

Compatible Bracket: 4mm Aluminium Coping Bracket (2mm coping system)

Fabrication: Made to order, non-returnable unless faulty

Country of Manufacture: United Kingdom (Chelmsford, Essex)


Understanding the Size: Width, Not Run Length

The 29 size options from 185mm to 885mm refer to the overall WIDTH of the coping profile, the girth across the top from external leg tip to internal leg tip, not the length of the run. Every section on this page is 2m long regardless of the size selected.

The width size is calculated from the wall width:

  • Measure the parapet wall width at the top from outside face to inside face.

  • Add 100mm (external leg) + 75mm (internal leg) + 10mm + 10mm (returns) = 195mm.

  • Total: wall width + 195mm = the size to order. A 190mm wide wall gives 385mm. A 265mm wall gives 460mm. A 340mm wall gives 535mm.

  • If the result falls between two available sizes, select the next size up.

  • Quickest site check: measure across the top of an existing installed coping section. That measurement is the size.

How to Install 2mm Sloping Coping 2m Lengths

Mark bracket positions along the full run before fixing anything. Fix the 4mm aluminium coping brackets at the correct centres, not exceeding 1000mm with brackets within 150-200mm of every run terminal, corner junction and stopend position. For a 2m length, you need a minimum of three brackets: one near each end and at least one intermediate at approximately 1000mm from the start of the section. Confirm all brackets are level and aligned before pressing any coping.

Press the 2m coping sections onto the brackets from the fixed terminal end of the run. Before butting each section up to the previous one, apply a continuous bead of colour coded sealant in the matching RAL to the internal face of the joint. On a 2m section with fewer joints than an equivalent 1m layout, each sealant application covers a longer joint-free span but the sealant at each joint is just as critical. Do not skip or reduce the bead.

Lock the coping to the brackets using colour coded fasteners in the matching RAL colour at the bracket positions. Fit the left and right handed closed stopends at the run terminals and the appropriate corner pieces at every change of direction. Apply a finishing sealant bead on all external joint faces.

Where the 2m Sloping Coping Length Is Used

Box Dormers: the Natural Single-Length Solution

The front parapet of a standard box dormer on a terraced or semi-detached house in the South East typically measures between 1.8m and 3.5m wide. A single 2m section covers most of these front parapets either as a cut-free full length or with a short trim at one end. The two short side returns of a box dormer, each usually under 600mm, are served by cut sections from a 1m length. The result across a standard box dormer installation is one 2m section on the front and two 1m sections on the returns, three pieces, minimal waste, minimal joints on the most visible face.

Rear Extensions with 4m to 6m Parapets

Single-storey rear extensions with parapet walls in the 4m to 6m range are well served by the 2m length. A 4m parapet takes exactly two 2m sections with one joint and no waste. A 6m parapet takes three 2m sections with two joints cleaner than six 1m lengths with five joints, and more economical than two 3m lengths with a 0m waste (6m divides neatly, but 3m lengths on short faces would still require ordering extra to account for corners and details). On parapet faces in the 4m to 6m range, 2m lengths are consistently the most efficient single-length choice.

Outbuildings and Garages with Medium Parapet Faces

Flat-roofed garages and outbuildings commonly have parapet faces in the 2m to 5m range. On a three-bay garage with individual bay wall faces of 3.5m each, a 2m length plus a 1.5m cut from a second 2m section per face gives a clean two-piece result. The waste from the cut section (500mm) is usable as an infill piece elsewhere on the job if the run layout allows, which is a practical waste-reduction advantage over cutting from a 3m section where the offcut would be 1.5m.

Second-Storey Extensions and Side Returns

Side return extensions and first-floor parapets on terraced houses across East London, Chelmsford, Colchester and the wider South East frequently produce medium-length parapet runs where a mix of 2m and 3m lengths is the most efficient approach. The 2m length fills the gaps that 3m lengths cannot cover without waste, reducing the total number of joints while keeping material cost close to the minimum. Ordering the full system from the same Chelmsford manufacturer, including the 4mm brackets, sealant, corners and stopends alongside the lengths, ensures everything arrives together in matching colour.

Choosing Between 1m, 2m and 3m Lengths

A full worked guide to length selection for the sloping coping system is on the 2mm sloping coping 1m length page. In summary:

  • Use 3m lengths for all long continuous parapet runs of 3m or more where the run divides reasonably into 3m sections. Minimum joints, lowest cost per linear metre.

  • Use 2m lengths for medium parapet faces (typically 2m to 5m), box dormer fronts, and infill where the remaining run length sits between 1m and 3m. Better joint economics than 1m on medium runs.

  • Use 1m lengths for short runs under 1.5m, the final infill piece at the end of a longer run, and tight-access positions where a 2m section is difficult to handle.

Most domestic parapet installations use a mix of all three lengths. Plan the run with 3m sections first, 2m sections for medium spans and infill, and 1m sections only where the remaining length genuinely requires a short section.

Frequently Asked Questions

When is a 2m length better than a 3m or 1m?

The 2m length is the right choice when the parapet face measures between 2m and 5m, when a box dormer front parapet can be covered with one or two sections and no significant waste, when a 3m section would produce more than 500mm of waste at the end of a run, and when reducing joint count on a visible parapet face is a priority. The 2m length produces fewer joints than the same run covered with 1m sections and generates less waste than a 3m section on runs that do not divide neatly into 3m lengths.

The product shows 29 sizes. Are these different run lengths?

No. Every section on this page is 2m long. The 29 sizes from 185mm to 885mm refer to the WIDTH of the coping profile, the overall girth across the top from external leg tip to internal leg tip. You select the size that matches your parapet wall width using the formula: wall width + 195mm. For example, a 190mm wide parapet wall needs the 385mm size, which arrives as a 2m section that is 385mm wide. Selecting the wrong size means ordering a coping that is either too narrow (will not seat over the wall correctly) or too wide (will overhang the internal face).

How many brackets do I need for a 2m section?

A minimum of three brackets per 2m section: one within 150-200mm of each end of the section, and at least one intermediate at approximately 1000mm from the start. This keeps all bracket spacings at or below the 1000mm maximum centre. The 4mm aluminium coping bracket is the correct bracket for this 2mm system. Do not use the 5mm bracket, which is specified for the 3mm coping system only.

Can I mix 2m and 1m and 3m sections on the same run?

Yes. All three lengths in the 2mm sloping coping 100mm system use the same profile, the same bracket dimensions, and the same accessories. The junction between a 2m section and a 1m or 3m section is a standard butt joint sealed with colour coded sealant, exactly like any other joint in the run. Mix lengths freely according to what the run layout requires the system is designed to work with any combination.

Is this product anodised or powder coated?

Powder coated only. The finish is an external grade polyester powder coat available in any RAL colour. These products are not anodised. The current product page contains multiple incorrect statements about anodising processes and anodising technology, these are factual errors that do not apply to this product and are being corrected. Powder coating is the only available finish across the entire Online Metal Store Ltd sloping coping range.

How many 2m lengths do I need for a given parapet run?

Divide the total run length by 2m and round up to the next whole number, then adjust for any sections where a 1m or 3m length is more appropriate. On a 7m run, for example, three 2m lengths and a half-cut from a fourth section gives 7m with three joints. But three 3m lengths also cover 9m, and you could use one 3m plus two 2m sections for the same 7m with two joints and lower waste. Planning the run arithmetic before ordering gives the best combination of low waste and low joint count.

Part of a Complete 2mm Sloping Coping System | 100mm External Leg

This 2m length is one of three available run lengths in the 2mm aluminium sloping coping system with a 100mm external leg. A complete parapet installation requires lengths in the appropriate mix, corner pieces at every change of direction, stopends at every run terminal, brackets at correct centres, sealant at every joint, and colour coded fasteners. Ordering all components from the same Chelmsford manufacturer gives matching profiles, consistent colour, and system compatibility. The full 2mm sloping coping system with 100mm external leg includes:

For the full sloping coping range including the 125mm external leg and 3mm versions, visit the Aluminium Sloping Coping collection page. See the system in use on a live residential project in the aluminium sloped coping case study.

Standards and Compliance

Aluminium sloping coping on flat roof parapets in the UK is specified and installed under BS 6229:2018 - Flat Roofs with Continuously Supported Flexible Waterproof Coverings. This standard sets out the requirements for parapet and edge detailing on flat roofs, including coping specification, joint treatment and fixing requirements. A correctly installed 2mm aluminium sloping coping system with sealant-bedded joints and properly spaced brackets is consistent with the weathertight parapet detailing requirements of this standard.

The external grade polyester powder coat finish applied to all components in the 2mm sloping coping range meets the requirements of BS EN 12206-1 - Organic Coatings on Aluminium and Aluminium Alloys. The same coating specification applies consistently across all components ordered together, ensuring matching colour and durability from lengths to corners to stopends.

 Download Our Colour Chart

Custom Fabricated Item

This is a custom-fabricated item made to your selected size and finish. Please double-check measurements before ordering. This product is non-returnable unless faulty, as explained in our Refund & Return Policy

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