Insulation
Insulation installs materials such as fiberglass batts, blown-in cellulose, or spray foam in attics, walls, and crawl spaces to reduce heat transfer and air leakage. R-value and air sealing determine performance, and it is priced per square foot.
How insulation is done
- Assess the area and target R-value
- Air-seal gaps, penetrations, and bypasses
- Prepare the cavity and protect wiring and fixtures
- Install batts, blown-in, or spray foam
- Add ventilation baffles where needed
- Verify coverage and depth
What homeowners should know
- Ask for the recommended R-value for your climate zone
- Understand that air sealing matters as much as insulation
- Compare batts, blown-in, and spray foam on cost and performance
- Confirm attic ventilation is preserved
- Consider rebates for energy upgrades
Permits, timelines & things to consider
- Some insulation work, especially spray foam, may need permits or fire barriers
- R-value target depends on climate zone and location
- Material choice and coverage drive cost per square foot
- Air sealing before insulating greatly improves results
- Moisture and ventilation must be managed to avoid mold
Frequently asked questions
What R-value do I need?
The recommended R-value depends on your climate zone and where it is installed, with attics generally needing more than walls.
Is spray foam better than batts?
Spray foam air-seals and insulates in one step with a higher cost, while fiberglass and cellulose are cheaper but require separate air sealing; pricing is per square foot.
Will more insulation lower my energy bills?
Adding insulation and air sealing reduces heat loss and gain, typically lowering heating and cooling costs, and may qualify for rebates.