cavity wall insulation
 

We recently had cavity wall insulation installed under the grant
scheme through our power suppliers. they used rockwool, but how do we
know they did the job thouroughly? I fitted a vent for tumble drier
last weekend and couldn't find any sign of insulation material in the
cavity in that area, although 2 holes had been drilled within a metre
of the hole. the company are coming to "rectify" the problem on
wednesday, but we are not confident they did the whole job properly.
who would we go to, to get a survey done?, is it worth doing that.
AP

cavity wall insulation