In an earlier contribution to this discussion,
Graham wrote:

Hi,

I have a bungalow built in 1950s with a suspended floor and a pitched
roof extension. The extension measures 12ft x 15ft and is heated by
a 2ft x
2.5ft single radiator (inadequate, I know). Since moving in 9 months
ago, I have noticed mould growing on curtains / carpet etc
particularly in the extension. The extension is noticably colder
than the rest of the bungalow even though it's directly off the
lounge. I pulled the carpet up today and found that there was white
mould (smells mushroom-like) underneath the underlay on the chipboard
flooring - it feels damp. I removed a piece of the flooring and got
a good draught so the air bricks must be Ok. It's just chipboard
flooring - no insulation of any kind. The original part of the
lounge has floorboards and does not feel damp.

What do you reckon - is it a ventilation problem? Should I take up
the chipboard and lay floorboards and hope that improves things? Or
does the floor need insulating - how would I go about doing this?
Could condensation have built up in the chipboard due to inadequate
heating?

Any advice greatly appreciated!

Graham.

Are the joists wet? What is supporting them? Is it possible that there's a
sleeper wall under the joists which doesn't have a proper DPC?
--
Cheers,
Set Square
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