11/03/2026
What attic insulation is best? The one that fits your attic.
There's no single best choice for every home. Here's how it usually works out:
- Blown-in cellulose: often the easier fit for an open attic floor with lots of wires, pipes, ducts and odd corners, because it fills around everything. It's our most popular.
- Batts: a good fit where the joist spaces are clear and even.
- We also install blown-in fiberglass.
What matters most is the right type at the right depth. At your free inspection, we recommend the material and R-value that fit your home and list them on your written quote.
Get 10% off for seniors, expecting moms, veterans or multiple services, or $300 off jobs over $2,000 (one discount per job).
AttiCali EcoShield. Licensed, insured and bonded. CSLB #1149346. Serving the whole Bay Area.
📞 Call 1-408-664-9888 or book your free inspection: https://atticali.com/blog/cellulose-vs-fiberglass-insulation