EPDM Internal Drain

Internal Drain Water Outlet with leaf grate available in 3 sizes 68mm, 100mm. 110mm 

In stock
£23.76 £19.80

Delivery From £15 for all Standard Flat Roofing Materials.
Compatible Systems:
  • The ClassicBond One Piece EPDM system is great for large or small flat roof areas and is normally bonded on to a timber deck in one piece so no joins!
    Find out more!

  • The ClassicBond Pro Fleece Reinforced EPDM system is a high-performance, reduced shrinkage system which is ideal for large overlay roofs due to rapid installation times.
    Find out more!

Used For: EPDM drain outlets are used to join a rainwater down pipe to the EPDM membrane where the drain runs through the roof deck.

Size: Fits Standard Domestic Downpipe, 100mm Downpipe and 110 Downpipe. 

Installation Notes: 
1) Cut the drain flange down to leave a 25-35mm flange. 
2) Cut the appropriate sized hole in the roof membrane. (68mm 100mm 110mm).
3) Insert the drain ensuring a positive fit inside the down pipe. 
3) Fix to decking by screwing through the flange into the roof deck using 3 wood screws. 
4) Prime the Internal Drain and surrounding roof membrane with rubber primer. 
5) Cut a piece of 9" Uncured Flashing to place over the internal drain ensuring at least 60mm extra on all sides is bonded to roof membrane 
6) Adhere flashing to drain and membrane using seam roller once the primer is touch dry. 
7) Cut a hole in the flashing making sure not to cut internal drain
8) Insert leaf guard.

An Overview



Stock Type

Warehouse Fulfilled

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Questions & Answers (3)

What is the Life Expectancy of EPDM Rubber Roofs?

EPDM Rubber roofs have a 50 year life expectancy.

EPDM has been in commercial use since the 1960s. And many of those roofs are still around today. 

Is Classicbond EPDM BBA Certified?

Yes. ClassicBond EPDM holds the British Board of Agrément certificate, No. 11/4853, issued to Flex-R Ltd. The BBA carries out assessment, testing, approval and certification of products and systems for the construction industry against national requirements, internationally recognised standards or other relevant technical specifications, reviewed and reissued every 3 years.

Fire Ratings

The ClassicBond system is also fire rated, the 1.2mm EPDM has a fire rating of EXT.F.AB and the 1.5mm EPDM membrane is fire rated to EXT.F.AA. Fire rating is carried out on a variety of deck surfaces and it is important to seek the certificate that relates most accurately to your roof structure.

What Temperatures Can A Rubber Roof Be Installed In?

We recommend a minimum temperature of 5 degrees C for EPDM installation. This is due the the WBA adhesive being water based and lower temperatures may cause the adhesive to freeze over and fail. 

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  2. Pipe Boot
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