Gap between loft flat roof and ridge line, how to seal?

[anonymous-user]

[redacted]

[roofer]

Is it at the junction of the ridge tile and the lay board for the upstand ?

If water is getting blown up, they haven't taken the upstand high enough, or put a welt on the top.

You can get foam rope in varying sizes that will stop the worst of it, but need a pic to understand better.

[roofer]

If there is only 1 tile before the ridge, i doubt there is the correct upstand height behind the tile.To be fair, a bit of crazy foam will be as good as anything without stripping the ridge off and doing it properly.

[andy43]

We have the same, but without the tile - the original grp upstand was a good 8", and now it's been EPDM'd the rubber goes right over the ridge and down the other side. Foam!

[andy43]

The only proper way to properly sort it as roofer says is to extend the upstand higher behind the slates - but that'd mean the ridges and slates coming off and trying to add some plywood and fibreglass. Foaming it would seal it to some extent but isn't a long term solution as you're missing a fairly important bit of the roof design with little or no upstand.
We found our grp was actually porous - turns out it's a common problem, along with delaminating and cracking - so got the whole lot redone in EPDM, wrapping it right over the ridge along with a new dry ridge system, meaning a few vent slots being cut into the rubber underneath the ridge.