Spray foam insulation.
It keeps you warm.
Keeps you cool.
Lasts a long time.
Makes your attic look like a snow cave.
Or like some seriously bad skin.
Seals the house air tight as a thermos bottle.
Super energy efficient.
It expands rapidly as it sets. When we do attics and crawl spaces, we let the foam bloom and bulge as much as it wants to.
And that can look... kinda weird.
Like nuclear cauliflower.
Or something fresh from the oven.
But don't eat it.
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