Jeds and FMT were making the point that timber is poor as an insulator when compared with PIR/PUR. There is bound to be cold bridging by the timber when such thermally dissimilar materials are adjacent to each other.
Extra battens for PB vs Thermal Bridging
- Thread starter Andy7
- Start date
Jeds and FMT were making the point that timber is poor as an insulator when compared with PIR/PUR. There is bound to be cold bridging by the timber when such thermally dissimilar materials are adjacent to each other.
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That's not the issue; it's poor compared with PUR/PIR.
Compared to concrete it is warm, however you should ask yourself why you can get cold spots showing through the plasterboard under a flat roof when there is only insulation between the joists and none under.
Ahem, excuse me chaps, but you'll probably find the cold bridge is located at the fixing nails/screws. As joe 90 rightly say's wood is an insulator not a conductor, full of trapped air (in the cellular structure) apart from when the timber is vacuum infestation treated then the cells are filled with a fluid which finally sets. This can act as a partial conductor for cold, so in fact you could be viewed as correct depending how you look at it
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Do you two know anything at all about building technology?
Is your degree in one of those subjects with "Studies" after it, or a proper degree?
Jeez give me strength, this is why the industry is up a certain creek.
I'm struggling with that. I presume you must be familiar with heat loss calculations. But if you were you would know that thermal bridging through timber studs and joists is a significant factor and it is standard procedure to calculate it out.
You guys!
Still,thanks for a 'lively and informative discussion'.
I did a little bit of stocktaking this afternoon and I have just enough 18mm OSB3 to clad the inside on the longest and weakest side. The one with the windows. The timber build is three sides extending a block structure as I said, out by 3m and 6m wide. So now that I have OSB sandwiching my studs and insulation I've pretty much got the ingredients of a SIPS board and (dare I say) maybe a little stronger.
Should be no way that'll get pushed over in the strongest gales now. PB over that and everyone's happy.
Thanks all !
Still,thanks for a 'lively and informative discussion'.
I did a little bit of stocktaking this afternoon and I have just enough 18mm OSB3 to clad the inside on the longest and weakest side. The one with the windows. The timber build is three sides extending a block structure as I said, out by 3m and 6m wide. So now that I have OSB sandwiching my studs and insulation I've pretty much got the ingredients of a SIPS board and (dare I say) maybe a little stronger.
Should be no way that'll get pushed over in the strongest gales now. PB over that and everyone's happy.
Thanks all !
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