Joining two sheets of EPDM
Joining EPDM Sheets using Cover Tape / Seam Tape
Cover Tape / Butt Join
- Stir the QuickBond Primer before pouring it into a small plastic container
- Apply Primer evenly to the RubberCover EPDM membrane either side of the join, avoiding any puddling
- In the event of rain or condensation, stop applying primer, do not close the seam and wait for better atmospheric conditions before applying a thin layer of primer
- In the event that the Cover Tape is not correctly aligned, cut the strip and make an overlap of at least 25mm with the strip that has already been installed. Apply a Corner Flashing Patch along any overlap of two Cover Strips.
- Any wrinkles must be removed and repaired with a piece of Corner Flashing.
Installation:
- Position the RubberCover EPDM sheets side by side, one against the other. The distance between the edges of the two sheets must not be greater than 10mm.
- Using the Scrubpad, apply primer to both sides of the seam area, covering a minimum of 100mm to both sides and leave to dry.
- Position the Cover Tape along the seam area. Remove the protective backing at a 45° angle and roll out using a silicone roller.
Seam Tape / Overlap Join
- Ensure you have a minimum 100mm overlap with your EPDM Membranes
- Mark 15mm beyond the upper sheet as a guide for priming
- Fold back the upper sheet (seam tape can be used to tack this back)
- Prime the base and underside of the EPDM overlapping areas (allow to tack-off)
- Apply the Seam Tape to the lower membrane and roll using seam roller
- Release the folded, upper membrane and ensure seam tape is showing
- Remove the protective film and roll overlapping membrane into the seam tape
If you require further assistance, please see our videos or call our friendly team, who will be able to help further.