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I imagine the actual vapor barrier would be pointless if the attic is well vented (not much humidity gradient). So what you tested was the insulation, not the vapor barrier itself.
Did your test of roof insulation extend into summer? It seems like insulating the underside of the roof would make the roof hotter. Same input from the sun on top, but less cooling on the underside of the roof. (Lifespan of the roof??) Attic venting isn't ONLY for heat load into the house; it also keeps the roof itself from getting any hotter.
I don't know what that radiant barrier is you're talking about... How about something thin & shiny, stapled across the roof trusses. So air can circulate between the roof & the barrier during the summer.
Posts in this Thread:
- OT Best place to buy insulation?, Schu, Mon, 15 Aug 2005 07:51:25
- eBay, Scott Paterson
, Mon, 15 Aug 2005 20:16:50 - Re: OT Best place to buy insulation?, Mattias.se, Mon, 15 Aug 2005 11:43:09
- you want moisture & heat out of the attic, BrianG, Mon, 15 Aug 2005 11:30:30
- Re: OT Best place to buy insulation?, JimBlake
, Mon, 15 Aug 2005 09:26:26 <-- Viewing This Message
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