i have a new attic to insulate, it has 2x4 rafters,24'' on center, any suggestions?

Answer 1

Roll insulation with the best R rating that you can afford. I had to do this last summer.

Answer 2

Use R-30 fiberglas insulation or blow in 9" of loose insulation. Be sure to place baffles at any attic soffit vents so the insulation does not cover the vents.

Answer 3

Polystyrene is a good insulater, yet there are diverse densities, i do no longer comprehend which you have, any way the terrific insulation is product called kingspan, that's provided in 8X4 sheets and you shrink it to extra wholesome tightly between your roof trusses, you will could desire to strip the plaster board off to do this, construction regulations dictate that there could desire to be a pass of air around your roof trusses, hence you cant use rockwool or a pumped insulation, you ought to use a good insulation geared up in such away that it does not extra wholesome on the factor of the roof tiles. good success

Answer 4

well i don't know where you live but 2x4's for rafters is pretty small/undersized. and when you put them 24" on center is a very weak roof. 2x6's 16" on center is like minimum, 2x8's at least for 24" on center. i hope you just typo'ed or live where it never snows! also you don't insulate the rafters, you put the insulation in between the ceiling joists, roofs need air circulation under them.

Answer 5

Research insulation for your geographical area (where you live),
lookup for the "R" rating/value.
Then, buy the best your budget can accomodate. Research how to enter and walk around your attic, the tools/equipment you may need, and/or higher a licensed contractor. ...I performed my work myself. (I have been working on my parents home since a kid, so I know my way around houses.) Good Luck.