Has anyone had any experience having wall cavities filled where the house
exterior is either partly plastic clad or has hung tiles etc.? Is there
really a need to drill holes at 1 meter intervals? I realise that the dry
stuff eventually becomes sticky to prevent it all pouring out if you make a
low level hole in the brickwork for extensions etc. but it does all seem to
be blown in dry at first.
Michael in sunny Sussex, England
I had it done some years ago, it was some fibrous material and it
remains dry. The stuff used not sticky and friction stops it from
simply falling down, so if it was loosly filled it would compact or
fallout if a low level hole was made.
Filling holes have to be drilled at regular intervals to ensure even
spread, the narrower the cavity the closer together the holes have to be.
I should imagine the holes would ruin tiles and plastic cladding.
I have not seen them insulate other than conventional brick cavities but if
you phone your local CW installation company their surveyor will tell you
whether your property is suitable and whether there is a work-around. They
have to do a survey anyway before they can give you a quote. They use
blown-in mineral wool in my area (East Kent). It doesn't become sticky and
doesn't pour out. Pouring out of a hole used to be a problem when they used
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