Wasted $600 on special desert insulation that did nothing | Desert Home Renovations

Fiona Hunt · 2026-05-09T19:15:04.311667+00:00

I put in this fancy spray foam insulation that was supposed to be perfect for the heat out here in Phoenix. After 8 months, my energy bill dropped maybe $12 total. The installer told me it would cut cooling costs by 30 percent. I should have just gone with regular fiberglass batts and saved my money. Has anyone else tried those reflective roof coatings instead? I'm thinking about going that route now.

green.noah4mo ago

Now my attic doubles as a pizza oven" - that's exactly what happened to me too lmao. The spray foam traps all the heat in the attic space instead of letting it escape through the roof. My attic hit 140 degrees on a 110 degree day. I checked it with a thermometer. The reflective roof coatings work but you gotta reapply them every couple years or the sun bakes them off. A buddy of mine used that white elastomeric paint on his roof and said it knocked his temps down like 10-15 degrees the first summer, but by year three it was peeling and barely helping. So you're basically trading a one-time screwjob for a recurring pain in the ass.

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barbara_jenkins664mo ago

Oh man, that sucks lol. I've heard mixed stuff about those reflective coatings too.

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kai_burns734mo ago

Lol, bought the same stuff and now my attic doubles as a pizza oven.

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