Benchwayze
Established Member
Shultzy and Steve,
My brother-in-law has been a qualified, Chartered Surveyor for well over 35 years. Then other day he revealed a 'trade-secret' to me.
The DuPont 'breathable' vapour barrier has been tried on three occasions since the 1970's and on the two previous occasions DuPont managed to steamroller their product, despite problems with damp.
Apparently, damp gets into insulation from outside, causing problems between layers of so-called damp proofing. This was causing studding to rot and it was concluded that the breathability worked both ways!
As far as he is aware, the design of the product hasn't changed so the problem might still be there. Maybe a case of financial muscle forcing the product into the market again.
I don't know how true this is, but I can't see any reason that my bro-in-law would make up a story like that.
So I am going to use building paper if I can get it!
Regards
John
My brother-in-law has been a qualified, Chartered Surveyor for well over 35 years. Then other day he revealed a 'trade-secret' to me.
The DuPont 'breathable' vapour barrier has been tried on three occasions since the 1970's and on the two previous occasions DuPont managed to steamroller their product, despite problems with damp.
Apparently, damp gets into insulation from outside, causing problems between layers of so-called damp proofing. This was causing studding to rot and it was concluded that the breathability worked both ways!
As far as he is aware, the design of the product hasn't changed so the problem might still be there. Maybe a case of financial muscle forcing the product into the market again.
I don't know how true this is, but I can't see any reason that my bro-in-law would make up a story like that.
So I am going to use building paper if I can get it!
Regards
John