Just finishing off the first fix plumbing in my new bathroom (upstairs)
and I'm turning my attention to insulating the new pipework before I put
the floor down (chipboard over the kitchen ceiling). I'm insulating
both hot and cold, to help stop condensation in the case of the cold,
but it worries me I have a cold bridge where the pipe passes through the
hole in the joist. Has anybody had any problems with this, and even
better, could offer a solution please?

Thanks.

"Cod Roe" wrote

Just finishing off the first fix plumbing in my new bathroom (upstairs)
and I'm turning my attention to insulating the new pipework before I put
the floor down (chipboard over the kitchen ceiling). I'm insulating both
hot and cold, to help stop condensation in the case of the cold, but it
worries me I have a cold bridge where the pipe passes through the hole in
the joist. Has anybody had any problems with this, and even better, could
offer a solution please?

Thanks.
None of my piping is insulated under the first floor and there are no signs
of condensation problems!
Unless you have a very old house that allows outside moist air straight into
the floor void I wouldn't worry too much about the cold and condensation.
More useful is to insulate the hot and/or ensure separation between hot and
cold. It's annoying and wasteful having to run lots of cold water to brush
teeth or drink because it has picked up heat from other pipes.
Unfortunately I can't get at the point where hot and cold pipes feed our
en-suite .

Phil

TheScullster wrote:
"Cod Roe" wrote

More useful is to insulate the hot and/or ensure separation between hot and
cold. It's annoying and wasteful having to run lots of cold water to brush
teeth or drink because it has picked up heat from other pipes.

Tell me about it... we have a long pipe run from where the rising main
enters the house and reaching the kitchen sink: it evidently comes close
to the central heating pipes at two places, for a substantial period,
because when you turn on the cold water tap the water goes
warm....cold....hot... cold ... hot... and finally cold.

Every time I have the floor up for something else these days I tend to
apply insulation to whatever pipes I can see, but haven't yet got to the
worst bit - fairly sure it's below a fitted wardrobe :-( At least we
aren't on metered water.

David