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Wall Trim Flashing

Step by step guide on installing wall-trim flashing to your next EPDM Roofing project.

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Step 1

Thoroughly clean the wall, chase and rubber.

Step 2

Apply a thin coat of contact adhesive to the rubber and the wall .
Shop EPDM Adhesives

Step 3

Once touch dry, starting at the bottom, carefully mate the surfaces together. Smooth by hand and silicone roller.

Step 4

Trim membrane.

Step 5

Position a piece of 9” Formflash or a Detail Kit as shown and mark the perimeter, allowing an extra 1 cm.
Shop Flashings & Seam Tapes

Step 6

Apply Techno primer to the marked area using a Scrubber pad and handle, allow primer to dry.

Step 7

Peel back a section of backing paper and, starting from the top, slowly work downwards as shown.

Step 8

Apply a gentle heat source to the corner if needed.

Step 9

Thoroughly roller with Silicone and Penny Rollers.

Step 10

Insert wall trim into chase and secure at 600mm centres with the supplied fixings. Rawplugs are not needed if a 5.5mm masonry drill bit is used.

Step 11

Thoroughly seal chase with Wall Mastic.

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Click on our friendly RoofBot to help you work out what you need for your DIY TRC - Techno Rubber project, just input your dimensions, answer some simple questions and let RoofBot do the rest. If you still need assistance, don't hesitate to contact us at or 01494 461711.

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