EPDM & Pebble Dash

[loopy66]

I need to replace a flat roof on a house extension. Currently it has the cold roof style set up and I am advised that over time condensation has rotted the boards from underneath. We are now getting pooling of water and leaks. The gravel has been taken back, the grooves/gaps have been applied with roof repair solution (Ronseal stuff I think), and the gravel put back. This is helping, but naturally the roof should be replaced.

I was looking at replacing with a warm roof set up, using Celotex TD4096 boards and covering with EPDM.

Bonding the EPDM to the wall might be an issue for me as the wall has pebble dash on it. I know it's tricky to remove pebble dash to take a house back to nice brick, but i'm wondering here if for my purposes it will be ok, ie, i'm not looking at taking it back to look nice, i'm looking at taking it off so I can bond the EPDM to the wall. Is this ok or are there any "gotchas" I should be aware of?

 

[Alastairreid]

You would run the epdm up the wall and under a lead apron which is channeled into the wall.

 

[loopy66]

Do you mean I wouldn't have to take the pebble dash off at all, or indeed it should be removed still?

 

[freddiemercurystwin]

this thread covers it: //www.diynot.com/forums/viewtopic.php?t=85734

In short remove at least 150mm render above the flat roof, fix the lead into a chase made in the masonry outer skin, make good.