On Sat, 15 Apr 2006 13:17:26 +0100, wrote:

On 15 Apr,
Ian Stirling wrote:

Mike Halmarack ... wrote:
To lag these pipes properly would mean pulling up a lot of
floorboards.
Does there really need to be quite so many air bricks allowing such a
cold draught in a floor of this type, at this level?

It's a fine balance.
You really, really don't want to get rotted floors, due to condensation.

Water comes out of the ground as vapour - if the underfloor is not
properly sealed, and from the top, though the floor.
If it then condenses, when it hits the cold underfloor void, bad things
happen.
I wonder how much power heat recovering vent bricks would save...

He's talking abou a first floor, which will have a ceiling below. These are
rarely ventilated.

This one has 2 louvered vents in the east facing wall at 1st floor
level. the other 3 walls have none. This may be enough to provide the
stiff breeze passing through but it could also be coming from
elsewhere, like up the cavity. But with this kind of timber framed
construction with a brick skin outside I think there's continuous
boarding between the frame and the cavity.
--
Regards,
Mike Halmarack

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