eeewwew

[jwpetal]

eaqWe are having an extension to our house built. Our builder has started building the walls and has added insulation. It has been damp with some light rain over the last 24 hours and he left the cavity walls uncovered. I went and felt the insulation along a side wall, where our doors will be, and it was damp. From the top, we can see that the insulation has shifted downwards - by the rain?. Should we have our builder redo the insulation? It is not soaking but he wants to do the roof over the weekend and we are concerned that the insulation will not be as effective if it was wet. Should we call in building control?

Any advice would be helpful

 

[noseall]

Cavity insulation gets wet then dries again.

It is nigh on impossible to keep everything dry. And if it were a case that we had to replace everything that got wet, particularly in the UK, all builders would be bankrupt.

Building control will not be interested in wet cavity insulation.

What do you suppose happens when cavity trays allegedly come into use?