Hiring a insulation prowhat to ask and when to book
Insulation contractors usually specialize in either spray foam or blown-in and batt work, and the right choice depends on the space. Attics are most often blown-in; rim joists, crawlspaces and new construction walls are where spray foam is used.
Ask for the target R-value in writing and whether air sealing is included, since sealing gaps before insulating is what makes the difference in a drafty house.
Utility rebate programs often require a specific contractor list or a pre-inspection, so ask before the work starts.
Questions worth asking
Every insulation listing on this directory shows the owner's answer to one trade question when they have given it: Spray foam, blown-in, or both? Along with free estimates and after-hours availability, that answer is labeled "owner reported" with the date we asked.
Insulation by city
| City | Based there | Nearby that cover it |
|---|---|---|
| Lancaster, PA | 10 | 10 |
| Harrisburg, PA | 9 | 7 |
| Lititz, PA | 3 | 10 |
47 insulation contractors listed in total as of Oct 2026, including towns too small for a page of their own.