Insulation is the least visible money you will ever spend on a house and often the best returning. This section works through R-value and what your climate zone actually asks for, the practical differences between fiberglass batts, blown cellulose and spray foam, where vapor and moisture barriers belong and what happens when one ends up on the wrong side, and the basics of how heat pumps work. Most of it comes out of my own attic: the cellulose blow that redecorated two rooms, the DIY spray foam kit I regretted buying, and the heating bill that finally drove me up the ladder. If you want numbers first, the R-value calculator is linked from these posts.
Defining Spray Foam Insulation: What Homeowners Need to Know TL;DR: Spray foam insulation is a high-performance insulation material sprayed on-site that expands to seal gaps and provide superior thermal resistance. It offers R-value s of R-6 to R-7 per inch (closed-cell) or R-3.5 to R-4 per inch (open-cell), blocks air and moisture, and can re
An attic insulation R-value guide helps you choose the right insulation thickness for your home based on your climate, with
