Tradition is five bids and throw out the high and low bids.
http://www.gp.com/build/product.aspx?pname=Plytanium%E2%84%A2+Thermostat%E 2%84%A2+Radiant+Barrier+Sheathing&pid=1398&hierarchy
Quote:
Q: When installed, should the foil face of Thermostat® Radiant Barrier Sheathing face the outside?
A: Roofs:
No. The panel must be installed foil side down facing the attic air space. For radiant barriers to perform, the reflective surface must face a minimum 3/4” air space. This is also practical since the foil surface would be very slippery and would produce intense glare for workman during installation if installed foil face up. Additionally, when installed foil down, dust can not accumulate and interfere with the proper functioning of the radiant barrier.
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Sounds like what you need in California, I like this number three, what kind of vibe did you get?
Yes, references..............a must.