haxxer_4chan OP t1_jef9d2r wrote on March 31, 2023 at 4:11 PM

Reply to comment by shootdang167 in Insulating angled roof rafters or laying insulation on the attic floor? by haxxer_4chan

Decisive, I like it. Thank you! Just to save on installation and materials?

shootdang167 t1_jef9sob wrote on March 31, 2023 at 4:14 PM

Yep. I presume your 1919 house doesn’t have soffit vents or ridge vents in the roof, so you would have to use closed cell spray foam which is a minimum of $2.50/sqft for 2” thickness (R14). This is per sqft of roof deck, not floor space.

haxxer_4chan OP t1_jefa3db wrote on March 31, 2023 at 4:16 PM

Yeah that's pricy, thanks a ton for the info!