While this service used to be one provided by just professionals, there are now DIY spray foam insulation kits available on .

Some of these are considerable and some are negligible, but unless you buy one of those DIY spray foam insulation kits, the largest ... applying it to basement walls tends to be the most pricey.

For attic walls, the recommended R-value varies based on climate zones. Each type has pros and cons. For example, fiberglass insulation is cost-effective but less airtight, while spray foam ...