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mhervy 10-19-2006 11:36 AM

Vapour Barrier
Does anyone know of a vapour barrier (manufacturer) that can withstand 90 degC?

mhervy 10-19-2006 11:58 AM

no worries, found one

concretemasonry 10-19-2006 11:59 AM

Vapour Barrier
Materials have a wide range of permeability and there is no magic number (perm rating), except for some go-no-go numbers written into a minimum standard code. Some poly is classifies as a "vapor barrier" and some is not, all because of a difference of 0.5 mils. Even a breathing paint can be a "vapor barrier".

What perm rating do you need?

Is it for a true barrier or just to meet code requirements?

What are you going over and how are you attaching or pentrating it?

90C is not impossible, but it is a challenge is you want a true sealed vapor barrier w/o pentrations.


mhervy 10-19-2006 01:00 PM

thanks man, i know what a vapour barrier does and I have to cover pot light box's with it, i've found a manufacturer in canada that has a vapour barrier capable of this.

mhervy 10-19-2006 01:07 PM

i have to penetrate it with wire...

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