How to insulate steel poles supporting windows in conservatory

knockboss · 19-12-2011 08:55PM #1

Hi,

I have just put in passive windows and the are held in place with 100mm steel poles that have been wrapped in PVC to match the windows.

The problem is that they are cold bridge and even though they are wrapped in PVC they are very cold inside and leading to a lot of condensation.

Any ideas how to insulate or cover them on the outside so stop them getting so cold and the cold causing condensation. Are the moment we are thinking of getting matching PVC the same as the windows, cutting them to about an inch deep and filling them with expanding foam to insulate them.

ANy thoughts,

Thanks

Dave

Joey the lips · 19-12-2011 09:02PM

Pipe lagging.

knockboss · 19-12-2011 09:56PM

Thanks for that, have been researching and think maybe external insulation for that is used for external wall, putting some mesh on it then render it.
What do you think ? Do you have any links for Irish sites that might have pipe lagging for sale ?

Dave

Carlow52 · 19-12-2011 11:56PM

100 mm is already a big pipe so putting some armaflex on it could bring it to 150 -200 mm
SYMBO might have some words re that:)

Can u post a picture?

youtheman · 20-12-2011 08:43AM

I built an extension last year and there was a 4" box section at the corner (that was subsequently cladded with PVC). I got the builder to drill it and fill it with expanding foam (before and windows were installed). It obviously works 'cause I don't have and 'cold bridge' problems. Not sure what the 'U' value of expanding foam is, but my logic at the time was it was cheap, easy, and there did not seem to be any real alternative.

meercat · 20-12-2011 08:17PM

youtheman wrote: »

I built an extension last year and there was a 4" box section at the corner (that was subsequently cladded with PVC). I got the builder to drill it and fill it with expanding foam (before and windows were installed). It obviously works 'cause I don't have and 'cold bridge' problems. Not sure what the 'U' value of expanding foam is, but my logic at the time was it was cheap, easy, and there did not seem to be any real alternative.

this seems like a good idea to me

JohnnieK · 20-12-2011 09:55PM

youtheman wrote: »

I built an extension last year and there was a 4" box section at the corner (that was subsequently cladded with PVC). I got the builder to drill it and fill it with expanding foam (before and windows were installed). It obviously works 'cause I don't have and 'cold bridge' problems. Not sure what the 'U' value of expanding foam is, but my logic at the time was it was cheap, easy, and there did not seem to be any real alternative.

Should of done that this year when I got my sun room done. Saying that I sized the rad to a tee and have it as a separate zone and it's holding it's own. Even with the last few cold nights it doesn't drop below 15oC during the night with the heating off and the set back temp is 14 on the stat

JPJ · 23-01-2012 06:43PM

How do you prevent a thermal bridge where a concrete post is bolted to the concrete raft? Is it necessary?
The steel posts in the cavity are supporting steel beams which are supporting hollowcore, and concrete lintels over windows. So the steel bridges the cavity. I am trying to follow as many of the passive principles as I practically can. My builder thinks it is ok just to wrap the post in insulation. I do not. What do you think?

How to insulate steel poles supporting windows in conservatory

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