2mm Aluminium Sloped Coping – Left Handed Closed Stopend | 100mm External Leg - Online Metal Store Ltd

2mm Aluminium Sloped Coping – Left Handed Closed Stopend | 100mm External Leg

£58.56
(£70.27 Inc VAT)

2mm Aluminium Sloped Coping – Left Handed Closed Stopend | 100mm External Leg

Coping stopends are one of the most commonly mis-ordered components in any sloping coping system. Not because buyers do not understand what a stopend does, but because "left handed" and "right handed" seem like they should be obvious until you are standing on a roof trying to work out which end is which, with a made-to-order, non-returnable component in your hands that does not fit. Two stopends of the same hand are useless on a straight coping run that needs one of each. Getting this right before ordering saves a week of waiting for a replacement and a job that cannot close out until the correct component arrives.

This is the left handed closed stopend for the 2mm aluminium sloping coping system with a 100mm external leg. It terminates the left end of a sloping coping run with a fully sealed, weathertight closure, matched to the angled profile of the 2mm sloping coping lengths. Available in 29 sizes from 185mm to 885mm and powder coated in any RAL colour at the Chelmsford facility. The guide below explains exactly how to determine which end is left and which is right before you place the order.

Sloping Coping vs Flat Coping: What Is the Difference?

Aluminium flat coping sits level on top of the parapet wall. Aluminium sloping coping has a built-in slope across the top surface that tilts toward the external face of the wall, so rainwater that lands on the coping surface is directed away from the building and discharged over the external face rather than sitting on the coping or draining back toward the roof. On an exposed parapet in the UK climate, the slope is a functional advantage: it reduces the risk of water pooling on the coping surface and the staining and joint stress that pooled water causes over time. The 2mm sloping coping lengths carry this slope across their full profile, and every accessory in the system, including this left handed stopend, is fabricated to the same sloped profile to maintain a consistent line and drainage direction from one end of the run to the other.

Whether sloping or flat coping is the right choice depends on the project specification and the parapet construction. Sloping coping is well suited to residential extensions, domestic parapets, and projects where active drainage off the coping surface is preferred. Flat coping is common on commercial projects where the architectural specification calls for a clean horizontal profile. The 2mm sloping coping system is stocked alongside the 2mm flat coping range at Online Metal Store Ltd, with the same RAL colour options and the same Chelmsford manufacturing lead times across both systems.

Left Handed or Right Handed: How to Determine Which You Need

This is the question buyers get wrong most often, and the answer is straightforward once you know the method. The handedness of a sloping coping stopend is determined by standing outside the building and facing the parapet wall, so that you are looking at the external face of the coping from the outside.

  • Left handed stopend (this product): goes on the LEFT end of the coping run as you face the external wall from outside the building. The slope of the coping runs from right to left as you look at it, with the high point at the right and the low (draining) point at the left. The left handed stopend closes off the left-hand terminal of that run.

  • Right handed stopend: goes on the RIGHT end of the coping run as you face the external wall from outside. The right handed closed stopend is a separate product in the same range.

  • Practical check on site: stand on the footpath, driveway or ground outside the building and face the parapet. The left end of the coping run as you look at it needs a left handed stopend. The right end needs a right handed stopend. A standard straight parapet run needs one of each.

  • From the roof: if you prefer to work from the roof level rather than from outside, stand with the parapet in front of you and the building behind you. The left end of the run as you face the parapet needs the left handed stopend. This gives the same result as the external view.

  • L-shaped and multi-run parapets: on a parapet with multiple runs and corners, each straight run has its own two ends. Work out the hand for each run termination independently using the same method. Corners do not have a hand, they transition direction; only the open terminal ends of each straight run need a stopend.

The companion product to this stopend is the right handed closed stopend for the same system. Most parapet installations require one left handed and one right handed stopend per straight run. Order both when placing the coping system order to avoid a second delivery wait for a made-to-order component.

Product Overview

The left handed closed stopend is part of the 2mm aluminium sloping coping system with a 100mm external leg, manufactured at the Online Metal Store Ltd facility in Chelmsford, Essex. It caps the left terminal of a sloping coping run with a fully formed, sealed closure that follows the sloped profile exactly. The internal leg returns to 75mm and the 100mm external leg provides the overhang that carries water clear of the wall face. The 29 available sizes, from 185mm to 885mm in 25mm increments, cover the full range of wall widths encountered on domestic and light commercial parapet projects. If you are working with the wider 2mm sloping coping 125mm external leg system, the equivalent stopend for that leg size is a separate product.

All components in this system are powder coated using an external grade polyester finish in any RAL colour. This stopend is fabricated to order in the size and colour you specify, alongside the 2mm sloping coping lengths, corner pieces and other accessories ordered for the same project, so everything arrives colour-matched and profile-matched in a single delivery.

Key Benefits

Profile-Matched to the Sloping Coping System

The stopped end of a sloping coping run cannot be closed off with a flat-profile component. The stopend must follow the slope of the coping profile exactly, with the high side and low side of the end face matching the slope of the lengths running alongside it. This stopend is fabricated to the same sloped profile as the 2mm sloping coping lengths in the 100mm external leg range, so the junction between the stopend and the last straight length is flush, tight, and visually consistent with the rest of the installed run.

Fully Sealed Closed End

The closed designation means the end face is formed as a solid closure with no gap or open section. Once fitted and sealed with sealant at the joint to the straight length, the left terminal of the coping run is weathertight on all sides. There is no exposed edge, no open section at the profile end, and no pathway for wind-driven rain to enter the system at the termination. On a parapet where the end of the coping run faces a prevailing wind direction, this matters considerably.

Powder Coated in Any RAL Colour

Available in any RAL colour, with the powder coat applied to the same external grade polyester specification as all other components in the system. Order this stopend alongside the lengths, corners, and the right handed stopend in the same RAL colour and everything will be finished in the same batch at Chelmsford. The powder coat is the only finish available on this product. These products are not anodised.

29 Sizes for Any Wall Width

Twenty-nine sizes from 185mm to 885mm in 25mm increments mean virtually every domestic and light commercial parapet wall width is covered. The size guide below explains how to calculate the correct size from the wall width. As with all components in the sloping coping range, this is a made-to-order product fabricated in Chelmsford to the size and colour you specify. It is non-returnable unless faulty, so measuring correctly before ordering is essential.

UK Manufactured with Short Lead Times

Fabricated to order at the Online Metal Store Ltd facility in Chelmsford, Essex, with UK manufacturing lead times rather than overseas shipping delays. For projects across Essex, East London, the South East and the wider UK, the coping system components can be ordered together and delivered on a programme that suits the job timeline.

Technical Specifications

Material: 2mm grade aluminium

Profile: Sloping coping closed stopend

Hand: Left handed (terminates the left end of the run as viewed from outside the building)

External Leg: 100mm

Internal Leg: 75mm (standard for 100mm external leg sloping coping)

Available Sizes: 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)

Finish: Polyester powder coating, external grade, NOT anodised

Colour: Any RAL colour to order

Type: Closed (fully sealed end face)

Compatible System: 2mm Aluminium Sloping Coping | 100mm External Leg

Fabrication: Made to order - non-returnable unless faulty

Country of Manufacture: United Kingdom (Chelmsford, Essex)

How to Measure for the Correct Stopend Size

The size of the stopend must match the overall width of the sloping coping profile on your parapet, not the wall width alone. The formula for the 2mm sloping coping with 100mm external leg and 75mm internal leg is:

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

  • Add the external leg (100mm) and the internal leg (75mm). That is 175mm in total.

  • Add both returns. Standard returns are 10mm each side: 10mm + 10mm = 20mm.

  • Total: wall width + 195mm = overall coping girth and stopend size. For example, a 190mm wide parapet wall gives 190 + 195 = 385mm. Order the 385mm stopend.

  • If the calculated size falls between two available sizes, select the next size up. A stopend that is very slightly oversized will seat correctly; one that is undersized will not close the profile properly.

  • Quickest method on site: measure the overall width of an installed straight coping length directly across the top surface from external leg tip to internal leg tip. That measurement is the stopend size to order.

How to Fit a Left Handed Sloping Coping Stopend

Fix the aluminium coping brackets along the parapet run first, with a bracket positioned within 150-200mm of the left end of the run. The end bracket must be far enough back from the wall termination to allow the stopend to seat fully over the end of the final straight coping length without the bracket fouling the inside of the stopend profile. The slope direction of the coping should be confirmed before fixing: the high point of the sloping profile faces the building, the low point faces outward. Check this against the slope of the stopend profile before pressing the run down onto the brackets.

Offer the left handed stopend to the left terminal of the coping run. The sloped end face of the stopend must align with the slope of the final straight length. Once the fit is confirmed, apply a continuous bead of colour coded sealant around the full internal perimeter of the stopend before pressing it into its final position. The sealant seals the joint between the stopend and the straight length on all three sides of the profile. On a sloping coping the end joint is particularly exposed to driven rain from the direction the parapet faces, so a complete, unbroken sealant bead at this joint is not optional.

Secure the assembly using colour coded fasteners in the matching RAL colour through the bracket bearing positions. Apply a neat finishing bead of sealant on the external joint face between the stopend and the straight length. The right end of the same run will need the right handed closed stopend installed in the same way from the opposite end.

Where the Left Handed Sloping Coping Stopend Is Used

Domestic Flat Roof Extensions and Parapets

Every straight run in a 2mm sloping coping system needs a stopend at each terminal end. On a domestic rear extension in Chelmsford, Brentwood, Colchester or anywhere across Essex and the South East, a standard rectangular parapet will have four straight coping runs and up to eight stopend positions. Each run needs one left handed and one right handed stopend. The 2mm sloping coping system is the most common choice for residential parapet copings where active water runoff from the coping surface is preferred over a flat profile.

Box Dormers and Rear Additions

Box dormers and rear flat-roof additions on terraced and semi-detached houses across East London, Essex and the Home Counties are among the most common applications for 2mm sloping coping. The front parapet of a box dormer typically has a single straight coping run with a left handed stopend at one end and a right handed stopend at the other. The slope of the coping directs water off the face of the dormer rather than back onto the roof membrane or into the junction with the main roof. Getting the stopend hands correct on a dormer is particularly important because the parapet end faces are often visible from the street.

Boundary Walls and Garden Structures

Aluminium sloping coping is used on low boundary walls, screen walls and raised garden structures as well as flat roof parapets. On a boundary wall with an open end visible from a public footpath or neighbouring property, the left handed closed stopend provides a neat, sealed termination that holds its appearance over the life of the installation. It works alongside the 2mm sloping coping corners and upstand stopends to complete the full perimeter wherever the parapet plan requires both turns and open ends.

Residential Developments and New Build

On residential development sites in the South East and the Home Counties where the house type includes sloping parapet coping, the stopends for each plot are typically ordered as part of the complete system package. The aluminium sloping coping case study shows how this system is deployed at development scale on a London residential project, demonstrating the colour consistency and profile quality that results from ordering all system components from the same Chelmsford manufacturer.

Frequently Asked Questions

What does "left handed" mean on a sloping coping stopend?

It means the stopend closes the left end of the coping run as you face the external wall from outside the building. Stand on the ground outside the building and look at the parapet. The end of the coping run on your left as you look at the wall needs a left handed stopend. The end on your right needs a right handed stopend. The handedness is determined by your viewpoint from outside, not from the roof or from inside the building. If you get this the wrong way round on a made-to-order product, you will receive a component that cannot be installed at the end of the run you intended it for.

Do I need one left handed and one right handed stopend for each run?

Yes, for a standard straight coping run with an open terminal at each end. Each run needs one stopend per end, and the two ends of a straight run will always require opposite hands: left at one end, right at the other. Most parapet installations need both. The right handed closed stopend for the same 2mm sloping coping 100mm leg system is a separate product. Order both at the same time in the same RAL colour to avoid a gap in the delivery.

What is the difference between a sloping coping stopend and a flat coping stopend?

A flat coping stopend has a flat, level end face that matches the flat top profile of a flat coping run. A sloping coping stopend has an angled end face that follows the built-in slope of the sloping coping profile. The two are not interchangeable: if you fit a flat stopend on the end of a sloping coping run, the end face will not be flush with the sloped profile and the joint will not seal correctly. Always match the stopend type to the coping profile type.

How do I calculate the correct stopend size?

Add the wall width to the total of both legs and both returns. For the 2mm sloping coping with 100mm external leg and 75mm internal leg with standard 10mm returns: wall width + 100mm + 75mm + 10mm + 10mm = wall width + 195mm. A 190mm wide wall gives a stopend size of 385mm. A 265mm wide wall gives 460mm. If the calculation falls between two available sizes, order the next size up. You can also measure the overall width of an installed straight length across the top surface: that measurement is the correct stopend size.

Is this product powder coated or anodised?

It is powder coated with an external grade polyester finish, available in any RAL colour. It is not anodised. Anodising and powder coating are different finishing processes. The OMS sloping coping system uses polyester powder coating throughout: on the lengths, corners, stopends and all accessories. There is no anodising option on these products. Specifying a RAL colour at the time of order gives you a powder coated finish in that colour across every component in your order.

Part of a Complete 2mm Sloping Coping System

This left handed stopend is one component in the complete 2mm aluminium sloping coping system with a 100mm external leg. A full parapet installation requires lengths, corners, stopends of both hands, upstand stopends where required, and brackets ordered from the same manufacturer. The full 2mm sloping coping system with 100mm external leg includes:

For the full sloping coping range overview, visit the Aluminium Sloping Coping collection page. If you are working with the 125mm external leg system, the left handed closed stopend for the 125mm leg range is the equivalent terminal piece for that wider system.

Standards and Compliance

Aluminium parapet coping systems in the UK are specified and installed in accordance with BS 6229:2018 - Flat Roofs with Continuously Supported Flexible Waterproof Coverings. The standard covers parapet and edge detailing requirements including coping terminations. A properly fitted and sealed sloping coping stopend at the terminal end of each run is part of a complete and weathertight parapet detail consistent with the requirements of this standard.

The external grade polyester powder coat finish applied to all Online Metal Store Ltd sloping coping components, including this stopend, meets the requirements of BS EN 12206-1 - Organic Coatings on Aluminium and Aluminium Alloys. All components in the system are finished to the same coating specification, ensuring consistent colour, gloss and durability across lengths, corners, stopends and upstands ordered together.

For NHBC-registered new-build projects, Chapter 7.1 of the NHBC Standards sets out parapet wall construction requirements. A correctly specified and installed aluminium sloping coping system, with properly fitted stopends at all run terminations, is consistent with these requirements and supports the new-build warranty position on residential completions.

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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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