DIYbanter - View Single Post - Cavity wall insulation

Phil L

wrote:
Hi,

I've had a company round to do cavity wall insulation this week. They
said they couldn't do it because the cavity was "too wide" ?!!

How can this possibly be the case?

The original surveyor who came out said my cavity at the front was
massive - and that some companies would refuse to do it simply because
of the amount of insulation material that would be necessary. He said
those companies would frequently "make an excuse" and say it could not
be done.

Well... that's what his company has just done. They said their
"brush" that stops the insulation from spilling over into neighbours
properties "won't fit in" because the cavity is too large.

hmm.. sounds like BS.

Completely true, although 150mm brushes are available, as compared to the
regular 75mm ones they normally use

What do other people think? any comments / opinions / recommendations
for the Lancashire area would be appreciated.

Pete, Preston.

The brushes are put down from top to bottom to stop the insulation spilling
into next doors cavity, which by law is classed as trespass, and this is
what causes damp, because 'their' insulation will not go from DPC to
roofline as yours will - it's only when insulation is stopped halfway up a
wall that water can track across from outside brick to inside block.

Have you measured the width of the cavity yourself?- if it's over 150mm,
then you may as well forget it.

--
Phil L
RSRL Tipster Of The Year 2008