08/29/2026
What's in your attic? This is all to common. Retro foam is a scam and here's the proof.
You should never dense pack or inject a cavity blind. This is a far to common result. Nothing gives spray foam insulation a bad name quite like this. Injection foam should never be installed in a climate zone 7.
If you are looking to have your insulation installed properly, here at Minnesota Spray Foam And Coatings ,LLC we will tear off your roof, remove the old insulation, and replace it with closed cell spray foam the correct way. This is also a great time to inspect the wiring to insure k**b and tube isn't present as well which is commonly seen with cracked or rotted trusses!
Here's a few pics to show the process.