Wallbarn TPE Corner Roof Outlet (Perforated Flange) - L500mm - D80mm

Product Code RO-TPE-030-360-500-080-Z
Incl. VAT £18.48

Est. delivery: 2-3 Working Days

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  • Pre-cast corner fitting for drainage holes
  • The shank is 500mm long
  • Encourages water flow
  • Extremely tough TPE connector

Wallbarn TPE Corner Roof Outlet (Perforated Flange) - L500mm - D80mm

Wallbarn supplies a pre-cast corner fitting for drainage holes on roofs, balconies and terraces which is situated between the horizontal deck and the parapet wall or upstand. Contractors need to be sure that the area around these holes, which will have to contend with a great deal of water run-off, is completely waterproofed and protected from puncture damage and stresses caused by building movement.

The drainage outlet connector (1) is designed to be sandwiched between two layers of bituminous membrane (2) using the perforated flange design for the over-and-under secure bond.

They ensure that the area is completely waterproofed around and into the drain pipe, so that there is no risk of water creeping behind the drainage hole and causing a leak.

The manner they are fitted is described in this example:

The outlet was installed into the drainage hole over an existing layer of bituminous felt in this instance, where a new bituminous membrane was being installed on top of insulation. A patch of felt was installed (right) on top of the existing membrane and torch bonded to it. It is important that the bitumen on the top of this patch is exposed. The upper side of the patch was also torch-heated so that the bitumen became tacky on the upper side.

The outlet was then placed on top of the patch when the bitumen was still tacky and pressed into it firmly. Some of the bitumen oozed through the perforations.

A second layer of felt was installed immediately on top of the flange (and the patch beneath it) whilst the bitumen was still tacky and again was torch-heated so that the bitumen on this upper layer also liquified slightly.

This means that the two layers of felt bonded to each other around the edge but also through the holes in the flange of the outlet, giving an extremely strong “over-and-under” bond.

The entire roof deck and the upstand was finished with a layer of torch-on felt whichhad been laid over the outlet. The area around the outlet hole was dressed with the felt membrane so that the whole area was sealed and the roof had a suitable fall into the drainage hole.

The spigot pipe is round and slightly recessed, with a small drop form the horizontal border flap to encourage the water to flow into the pipe immediately and not pond around the mouth of the pipe and possibly creeping back behind the outlet.
The pipe or shank is slightly angled down to create a “fall”, encouraging faster flow of the water down the pipe. The shank is 500mm long, so it can cross through 45cm of wall before having to be connected up.

The TPE connector is extremely tough, and resistant to UV deterioration and chemical salts.

They can be fitted to vertical downpipes at the edge of the retaining wall, or on a horizontal plane through the upstand or wall to then connect to the external downpipe.


They are measured as follows:

Wallbarn code Category D1 D2 D3 L F1 F2 F3
030-360-500-050 50mm 50 43 44 500 110 140 260
030-360-500-063 63mm 63 56 57 500 130 175 304
030-360-500-075 75mm 75 68 69 500 130 175 304
030-360-500-080 80mm 80 74 76 500 130 175 304
030-360-500-090 90mm 90 83 84 500 130 215 304
030-360-500-100 100mm 100 94 96 500 130 175 304
030-360-500-110 110mm 110 103 104 500 130 215 304
030-360-500-125 125mm 125 118 119 500 130 260 360

FREE DELIVERY on Roof Windows and Accessories on orders over £50 (Exclusions apply)

All other Delivery Charges are based on weight and location, please add products to your basket to calculate shipping.

A small amount of product lines from particular manufacturers listed below will incur a supplier delivery surcharge.

Next Day Delivery available on orders of stocked items if placed before 2pm

Deliveries will be made between 8am and 6pm. Delivery times apply to weekdays only.

Delivery of Windows to England, Wales, and the majority of Scotland:
Basket Value Price (£)
0-£50 £9.95
Over £50 Free Delivery

Delivery of Windows to the Channel Islands, Scottish Highlands, Northern Ireland, Isle of Man

(postcodes IV, HS, KA27-28, KW, PA20-49, PA60-78, PH17-26, PH30-44, PH49-50, ZE, AB)

Basket Value Price (£)
0-£249 £20
Over £250 £50

It is with regret that we cannot offer a service to these areas for orders over 126kg but please call us on and we will attempt to organise a delivery to your custom if required.

Supplier Delivery Charges

Please note the following supplier delivery surcharges:

Ariel Plastics = £25.00

Britmet Tileform= £35.00

Lead Products(orders under 250kg) = £50.00

Marley Eternit roof tiles (orders under a pallet) = £75.00

Marley Eternit sheeting (exclusions apply) = £50.00

Redland = £100.00

Palram = £25.00

Please phone us on if you are unsure.