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NotThamesWater-
What about the join where he cuts the membrane in half on the other side of the upstand?
I’m using tilting velux in my roof (yeah I know they’re only meant to be used on >15deg pitch, but what the heck, I like living on the edge). I think what I’ll do is unroll the membrane across the roof without the windows fitted and mark the openings. Then roll back the membrane, fit the windows, glue, unroll, swear a lot and hope for the best.
Trunkie
Anyone have any experience with EPDM roofs? The garden room I'm building has 2 velux that I need to trim the membrane around. Normally you'd unroll the membrane from the centre of the roof one way, then come back and roll the other. However this isn't really an option for me.