Top-Rated Insulation Installers in Peterborough, ON
3 local companies ranked by 185 Google reviews. Free to compare, no sign-up.
Short answer: The top-rated insulation installers in Peterborough are Just Spray It (5.0★, 150 reviews), Insulation Done Right Peterborough (5.0★, 15 reviews), KB Insulators (4.4★, 20 reviews).
Insulation installers in Peterborough, ranked
- 5.0 (150 Google reviews)738 George St N, Peterborough, ON K9H 3T3
- 5.0 (15 Google reviews)20 York Dr., Peterborough, ON K9J 6X4
- 4.4 (20 Google reviews)530 Lindsay Rd, Peterborough, ON K9J 6X3
Together these 3 companies average 4.9★ across 185 reviews. Just Spray It has the most reviews (150).
Ranked by Google rating weighted by review count, collected September 2026. Rankings are not paid for. How we rank and how we make money.
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What a insulation costs in Peterborough
Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.
That could cut your cost by up to $7,700 if you qualify. Most rebates have rules (income, your current heating, a registered contractor, approval before work starts).
Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.
Talk to a registered energy advisor first. Some rebates need an evaluation or heat load calculation before any work starts. See the top-rated registered energy advisors in Peterborough. Read when to call an energy advisor.
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Why insulation matters in Peterborough
In Peterborough, the average January low is -11°C, colder than 89% of the 123 cities we track. With winters this cold, the attic is usually the best place to start. Ask the installer to seal air leaks around lights, pipes and the attic hatch before adding insulation, or much of the benefit is lost.
Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.
Source: Open-Meteo historical weather data, 2015-2024.
Before you hire an insulation installer
- Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
- Ask for the R-value before and after for each area, and the material and depth they will install.
- Ask whether your rebate needs an energy assessment before and after the work, and who books it.
- Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).
Questions about insulation installers in Peterborough
Who is the best insulation installer in Peterborough?
Based on Google reviews, the top-rated insulation installers in Peterborough are Just Spray It (5.0★, 150 reviews), Insulation Done Right Peterborough (5.0★, 15 reviews), KB Insulators (4.4★, 20 reviews). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.
How are the insulation installers in Peterborough ranked?
We list 3 insulation companies in Peterborough, ranked by Google rating weighted by review count. Together they have 185 Google reviews and average 4.9 stars, collected September 2026. Just Spray It has the most reviews (150). No company pays to be listed or ranked.
How much does insulation cost in Peterborough?
Insulation prices depend on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.
Are there rebates for insulation in Peterborough?
Yes. Our verified program data shows insulation rebates up to $7,700 open in Peterborough. Most rebates have rules, such as income, your current heating, a registered contractor, or approval before work starts, so check the rebate page before you sign.
Is insulation worth it in Peterborough?
In Peterborough, the average January low is -11°C, colder than 89% of the 123 cities we track. With winters this cold, the attic is usually the best place to start. Ask the installer to seal air leaks around lights, pipes and the attic hatch before adding insulation, or much of the benefit is lost. Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.
What should I ask an insulation installer before I hire?
Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates). Ask for the R-value before and after for each area, and the material and depth they will install. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
Before you call anyone, check what insulation rebates you can get in Peterborough. Many programs require approval or a registered contractor before work starts.
Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers, energy advisors in Peterborough.
How to read these results
- Open the profile.How a installer describes its own work tells you a lot. Look for jobs like yours.
- Read the Google reviews.Stars and counts come from Google Maps. Click through and read what past customers wrote, good and bad.
- Check for program badges.A green registered-contractor badge means the company is on the program's own list, which some rebates require.
- Compare three.Do not stop at the first good installer. Three quotes show you the real range in price, equipment and plan.
Not ready to talk to a contractor yet?
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