u/Torp1d

I just bought a 1960s ranch, the attic is solid with no signs of water damage and has all the proper ventilation.

Currently it’s rated at r-5 and we live in New England, tomorrow I have a company coming to bump it up to R49 to meet energy efficiency codes.

My question; the existing rafters and joists are 2x4 (beautiful older material) Will this be enough to support the new weight? There is nothing else in the attic besides a small air handler.