Settled attic insulation below code minimum
Why it happens here
Loose-fill fiberglass and cellulose lose depth over 15 to 25 years as they compress under their own weight and get disturbed by HVAC work. Most Lindon attics we inspect sit between R-15 and R-25, well under the R-49 that climate zone 5 requires.
Our approach
We measure existing depth, air-seal the attic floor, then blow new material to a full R-49. Depth gauges stay in place so you can verify the number yourself after we leave.