Today we’re talking about what came after framing: Insulation. Since we live in Texas, where generally the weather forecast for any day later after April is “balls hot”, this topic is very important to us.
Our last house was horribly insulated. It was awful. Like I don’t know enough superlatives to describe how inefficient that house was. More than once we had electric bills over $700. It was brutal. In this house, we wanted to be as efficient as we could afford to.
The 2 basic options when it came to insulation were fiberglass insultation or spray foam insulation. When I say that we had options, our builder basically said “you can have fiberglass if you want, but you’re crazy if you do.”
Apparently, with fiberglass 30% of the air leaks through the insulation. Whereas foam insulation has 0 air leaks and is way more efficient.
Inside the walls, they basically spray the insulation, then cut it back to the studs. Above is what it looks like before its cut. And below is what it looks like after it’s cut back to the studs.
Up in the attic, they don’t cut it. They just let it stay as thick as it gets when it’s sprayed on. They crazy thing was watching the guy up in the rafters spraying the roof.
The difference the insulation makes is pretty astonishing. Walking into the house, even when it’s blazing hot outside, it’s reasonable inside the house. The temperature difference between the inside and outside was pretty jaw dropping the first time we went in, even without HVAC.
If you’re interested in reading more on the difference between the 2 insulation types, this page is a pretty good source.