What to look for
- Experience with the type you need, like blown-in, batts or spray foam
- Liability insurance
- A written target R-value and depth
- Air sealing as part of the job
- Reviews that mention lower bills or more comfort
Questions to ask before you hire
- What R-value will you install, and how deep?
- Is air sealing included?
- Do you need to remove the old insulation?
- Will you keep soffit vents clear?
- Do you know of rebates or tax credits that apply?
Getting and comparing quotes
Ask each contractor to bid the same areas to the same R-value. Air sealing makes a big difference in how well insulation works, so note which quotes include it.
Red flags
- Won't name the R-value
- Skips air sealing
- Covers soffit vents
- Ignores signs of moisture or pests in the attic