Full-Fill Cavity wall and ventilation brick

Glanmor · 7 Jun 2016

Hi
quick question...

100mm block cavity walls near completion to roof height. Cavity is full fill mineral wool Dritherm32. Roof will be Warm deck Flat.

Will there be need for ventilation bricks near the top of walls?
(I do not have any built in at the moment)

I keep seeing condensation from rising heat in cavity
(under side of the temporary covers during the build).

I feel that the plastic cavity-closer at the top, when introduced, will sweat every night possibly leaving top of both skins damp. Foil-backed rigid roof insulation over the cavity-closer could also sweat underside of foil.

How do you avoid this?

Thanks
G

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Full-Fill Cavity wall and ventilation brick

Glanmor

DIYnot Local

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