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I am looking for construction details on a deck-style roof where t&g is laid over the rafters to become the finished ceiling inside. 2×4 sleepers are laid on top of the t&g to create a space for ridgid insulation then plywood and shingles follow. I’m specifically wondering how far apart I can go with the rafters if I use 1x t&g (My guess is 24″) and how far I can go with 2x t&g (My guess is 48″)and if the ridge would need to be engineered. This is for a 20×24 cottage in Massachusetts and I’ll probably put a 12/12 pitch on. Any suggestions or resources any one is aware of? Thanks in advance.
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Phil-
you don't mention the span of the rafters- as long as they are properly sized your assumptions are fine.
In reguard to the ridge- if you are not installing collar ties to keep the walls from spreading then yes it will have to be sized. Draw a scaled section of your porch and have a microlamm supplier size a ridge for you.
I've built about 800,000,000 porches this way and it makes a super looking retreat.
P.S. The last several I dressed the rafters with a router and it really looked great.
*Phil-you don't mention the span of the rafters- as long as they are properly sized your assumptions are fine. In reguard to the ridge- if you are not installing collar ties to keep the walls from spreading then yes it will have to be sized. Draw a scaled section of your porch and have a microlamm supplier size a rigde for you.I've built about 800,000,000 porches this way and it makes a super looking retreat. P.S. The last several I dressed the rafters with a router and it really looked great.
*Doug, when I add the two posts together, that comes up to 1,600,000,000 porches. I think you are exaggerating with the second post. Jeff
*Jeff- The second post is not an exaggeration- it is a bald faced lie.
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I am looking for construction details on a deck-style roof where t&g is laid over the rafters to become the finished ceiling inside. 2x4 sleepers are laid on top of the t&g to create a space for ridgid insulation then plywood and shingles follow. I'm specifically wondering how far apart I can go with the rafters if I use 1x t&g (My guess is 24") and how far I can go with 2x t&g (My guess is 48")and if the ridge would need to be engineered. This is for a 20x24 cottage in Massachusetts and I'll probably put a 12/12 pitch on. Any suggestions or resources any one is aware of? Thanks in advance.