"MikeP" wrote in message
bal.net...
For Techshield to act as a radiant barrier it needs
at least 3/4" air space on the shinny side.

If the housewrap, felt, insulation or siding is
going to touch the shinny surface save your money
and buy plain OSB or plywood of the appropriate span
rating.

Cheers Mike. I had that suspicion.