How to Install the EPDM Internal Drain Accessory
EPDM drain outlets are used to connect EPDM membrane to rainwater drains. Fast and simple to install as a part of your overall rubber roof project. In this guide, we’ll show you how to install the EPDM drain accessory and separate leaf guard. Easy-to-follow steps according to our in-house training team and the manufacturer guidelines. What you will need:
Buy EPDM and all the products you need for flat roofing securely online with fast UK delivery at PermaRoof Store. Give the team a call if you need any further help with your order or installation. |
Installing the EPDM Drain Detail
Step 1
During the process of installing the main rubber roof surface area, the EPDM membrane should be adhered to the substrate with bonding adhesive within 300mm of the drain outlet and the membrane cut away to reveal the drain hole.
Step 2
Insert the drain outlet accessory.
Step 3
Mechanically fix the outlet to the roof deck using V-plates and All-purpose fasteners, as recommended by the manufacturer.
Step 4
Using the recommended pad applicator, apply QuickPrime Plus primer to the area a minimum of 100mm beyond the perimeter of the flange. Wait for it to become tacky to the touch.
Step 5
Prepare a piece of SA flashing to a minimum of 75mm larger than the drain outlet diameter and apply to the primed area.
Step 6
Use the silicone roller to press out any air bubbles and to ensure total adhesion. Note that the QuickPrime Plus should still be visible around the edge of the flashing.
Step 7
Remove the SA flashing covering the drain outlet by cutting a hole around its diameter. It should be clear to see, but take care not to cut into the drain outlet accessory itself.
Step 8
Insert the leaf guard and you're done.
Buy the internal drain accessory online
More guides from PermaRoof UK
PermaRoof UK offers support to both trade and DIY for EPDM application. We provide a further range of installation guides, datasheets, product and technical information in the Knowledge Base and in our corporate resource library here.
Watch the video tutorial on YouTube >
Become an expert with our EPDM training days
We run accredited EPDM training days for both sheet membrane application and liquid waterproofing. Training days are held at the PermaGroup headquarters in Derby at our purpose-built, approved training centre. Intensive, one-day courses and certification.
Visit our corporate site to find out more about training >