Quote:
Originally Posted by freebeard
You shouldn't put staggered studs on 16" center, put them on 12" centers and have 24" between studs on the sheeting/siding.
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Sounds good.
Quote:
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Originally Posted by freebeard
How do those foam sandwich studs compare to metals studs filled completely with foam?
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https://www.buildingenclosureonline....s-wood-framing
4" metal studs are 3.5", but 6" and 8" studs are 6" and 8", respectively. The chart says that insulation rated R25 is effectively R7.8 16" on-center and R9.6 24" on-center.
You have eight inches of insulation, but it is like you only have 2.5"?
Fail!
I have wondered about that. Metal would be a far greater thermal bridge than wood, but vastly thinner, so you would have more insulation.
Steel studs are 25 gauge, which is 7/320th of an inch, while wooden studs are 480/320ths of an inch thick.
Just a bit thicker...
Walls with R25 insulation and wooden studs would effectively be R21.1 16" on-center and R21.5 24" on-center.
"The r-values of wood are specified as 1.25 per inch."
The r values of wall systems
A 2x8 is 7.5" thick and would have an R-value of around 9.375, so metal studs and R25 insulation are about as good as 8" of wood.
The 8" Tstuds were rated R20, but according to new standards [that are still being adopted], they are now R19.
Update on the Aircrete shed: