Steel beam insulation above ceiling

Johnboy54 · 10 Jan 2010

Hello to all.
Removed a few walls and replaced them with steel beams.
All with planning permission etc.
I've notched the joists and set them in the beams.
There's about 6mm of joist below the beams.
I'm concerned that once I plasterboard over them, the beams may cause a cold spot and perhaps show through.
Outside walls upstairs are built on them.
Any suggestions as to how to insulate this small gap, or am I worrying for nothing.
Thanks.
John,

PrenticeBoyofDerry · 10 Jan 2010

Have you thought of boarding with thermaline?
but if the RSJ is not cold now, likely it never will so don't see wht you should need to.

Deluks · 10 Jan 2010

Foam? Bubblewrap? Might want to pack some mineral wool against the web of the steel between each joist. Not cavity walls are they? If so were cavity trays used?

Johnboy54 · 10 Jan 2010

Never heard of Thermaline, but will look for it.
As for being cold now ... never checked. I just assumed.
I WILL check though.

Yes, I have insulated between webs.
They are cavity walls, and they do have trays.

Thermaline/bubble wrap seem to be the options.
You both seem to know what you're talking about, so one or other should be the answer.
If I knew, I wouldn't have asked, so thanks to both of you.
John.

PrenticeBoyofDerry · 11 Jan 2010

http://www.british-gypsum.com/press/press_releases/thermaline_guide.aspx

http://www.british-gypsum.com/produ...s/gyproc_thermal/gyproc_thermaline_basic.aspx

Johnboy54 · 11 Jan 2010

Checked those links.
Seems I do know what it is, but under different products.
The problem with that solution is, it's an old cottage.
I've had to level the floors by 3 inches of screed.
Then I'm putting 2 inches of Celotex down plus a floating floor.
The ceilings were low to start with, and I don't really want to lose more height by using more insulation that will lower the ceiling.
Thanks for all your replies.
John.

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Steel beam insulation above ceiling

Johnboy54

PrenticeBoyofDerry

Deluks

Johnboy54

PrenticeBoyofDerry

Johnboy54

DIYnot Local

Similar threads