Concerned about new flat roof covering letting in water/damp

[Redbeard]

On 30/10/2024 at 14:41, Aldrige63 said:

I actually just spoke to the builder and he tells me it's going to be a warm roof. So there's another layer going on top of what is already there. That's reassuring.

 

So currently from bottom up there is timber frame. OSB flat on top of the timber frame. Breathable membrane flat on top of the OSB. And he tells me there will be insulation on top of this and......I'm not sure of the next bits but he said it's a warm roof?

 

But you want a vapour control layer (VCL) on the warm side of the insulation, so where you say 'Breathable membrane flat on top of the OSB' wants to be a VCL, not a breathable membrane, in my view.

[saveasteading]

Builders who are ignorant of their subject do not do research. No chance of the wrong unz being on here.

[Aldrige63]

I'm probably paranoid but now the roof has just been left with the one layer of fibreglass from the 'cure it' kit, directly on top of the OSB boards exposed to the rain. As in you can see the OSB boards through the layer of fibreglass. Is this normal/waterproof? 

 

I know these things say they are waterproof but given it's not the final layer of the roof to actually make it water tight, I'm not sure why its a good idea to leave it exposed to the rain and water sitting on it, given it's a flat roof. 

 

Am I wrong or should this be covered until the final roof layer goes on?

 

Edited Thursday at 10:06 by Aldrige63