Re: osb rott an insulation
Sounds like you were reading the marketing hype from Tyvek.
Originally Posted by Timothy Miller
Those two have been in an ongoing mud slinging battle for some time --- 2 manufacturers claiming each other's product is better than the other.
To be clear --- Typar has a vapour perm of around 11 and Tyvek is somewhere in the high 20's. Typar does pass water vapour
The minimum standard (ASTM measurement ) is 5 perms -- so they both fall well above that minimum.
They both have pros and cons.
"" an ounce of perception -- a pound of obscure "