Insulating a building question

[Warmsy]

Just fur the bottom of the rafters 3/4" down and be done with it!

 

[Finch]

Just fur the bottom of the rafters 3/4" down and be done with it!

That's what I'm gonna do. I think that'll be the easiest thing to do. Thanks

 

[link]

On a lid, you really want at least an inch of air space between any insulation and any plywood, or that foil backed stuff you used. Just get some cheap 2x2 furring strips, fur down the trusses and then staple in your r15. If you do that, you'll also want vents to get air flow above the insulation.

 

[Firestone]

I would use cardboard insulation stops. Staple to the rafters for your desired amount of air space

 

[Finch]

On a lid, you really want at least an inch of air space between any insulation and any plywood, or that foil backed stuff you used. Just get some cheap 2x2 furring strips, fur down the trusses and then staple in your r15. If you do that, you'll also want vents to get air flow above the insulation.

Copy that on the furring strips but not sure what to do about vents. Have you seen all the pics I posted in this thread. Ideas?

Edit: actually there are vents I guess you could say due to the metal roof ribs. So as long as I keep that air space between the sheathing and insulation, I should have ventilation. Thanks!

 

[Warmsy]

Yes you have venting , assuming there's openings on the eaves

 

[def90]

Just get the cardboard or foam pieces that you staple to the rafter for the air channel out to the eave vents.

Raft-R-Mate 22-1/2 in. x 4 ft. Attic Insulation Rafter Baffle Proper Vents (70-Pieces)