Insulation
Utah Insulation cost. This critical trade keeps your home comfortable and energy-efficient, reducing heating and cooling bills.
What’s Included
Includes insulation of walls, ceilings, rim joists, and attic spaces. Typical materials include fiberglass batts, blown-in cellulose, spray foam, and rigid board. Scope varies by climate zone and local energy code. Most Utah homes use R-21 in walls and R-49 in attics. Also includes fire caulking around top plates, and sometimes includes sound insulation between interior rooms or floors if requested.
Notes:
insulation of walls, attic, rim joists, install & material
Builder Tips:
Spray foam performs better in tight spaces or vaulted ceilings, but is significantly more expensive. Verify if sound batt is included in bathrooms or bedrooms — it’s often a missed line item. Insulation contractors should seal rim joists thoroughly. Confirm which R-values are included to meet code in your Utah region (e.g., colder zones like Cache County may require higher values).
Real World Example:
A 4,200 sq ft home with standard wall cavities, truss roof, and unfinished basement:
Walls: R-21 fiberglass batts
Attic: R-49 blown-in
Rim joists: foam sealed
Total insulation package: $7,200–$8,400 ($1.70–$2.00/sq ft of conditioned space)
FAQ
Q: What R-values are required in Utah?
A: R-21 in exterior walls, R-49 in attic, and R-10–R-15 in basement walls depending on location.
Q: Is spray foam worth it?
A: It offers superior sealing and thermal performance but costs 2–3x more than fiberglass.
Q: Do you need sound insulation?
A: Not required, but many builders add it between floors or in bedrooms for privacy.
Q: Does insulation include sealing?
A: Yes — proper air sealing around top plates, outlets, and rim joists is critical and should be part of any good bid.
