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The 10 Best Insulation Contractors in Philadelphia (2026)
Insulation matters year-round in the Philadelphia region, where older rowhomes and suburban properties alike benefit from attention to air sealing and thermal performance. This list ranks insulation contractors serving the area using Google reviews: a Bayesian score that balances average rating with review volume, updated for 2026. We prioritized entries with substantial local feedback so readers can weigh both customer experience and consistent ratings when researching upgrades or repairs. Consider this a starting point for finding contractors who have drawn repeat attention from local homeowners and builders.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Koala Insulation of the Delaware Valley
Koala Insulation of the Delaware Valley comes out on top by pairing a perfect 5.0 Google rating with 168 reviews, a combination that produces a very strong weighted score in our system. That balance of an unblemished average and significant review volume is why it ranks first among insulation contractors covering the Philadelphia area. The listing is categorized as an Insulation contractor and shows an address in Westampton Township, NJ, within the Delaware Valley region.
The full ranking
Right Insulation
Right Insulation holds a 5.0 average on Google from 55 reviews and is categorized as an Insulation contractor in Laurel Springs, NJ.
55 reviews
Koala Insulation of Chester County
Koala Insulation of Chester County carries a 4.9 rating based on 252 Google reviews and is listed as an Insulation contractor in Exton, PA.
252 reviews
Koala Insulation of Doylestown
Koala Insulation of Doylestown appears with a 4.9 average from 243 reviews and is recorded as an Insulation contractor at an address in Hatfield, PA.
243 reviews
RetroFoam of Philadelphia
RetroFoam of Philadelphia averages 4.9 across 203 Google reviews; its Google category is Contractor and the address is in North Wales, PA.
203 reviews
Philadelphia Spray Foam Insulation
Philadelphia Spray Foam Insulation posts a perfect 5.0 rating from 35 Google reviews and is listed as an Insulation contractor in Philadelphia, PA.
35 reviews
Brelsford Insulation Ltd.
Brelsford Insulation Ltd. shows a 5.0 Google rating based on 35 reviews and is categorized as an Insulation contractor located in North Wales, PA.
35 reviews
Gunner Insulation LLC
Gunner Insulation LLC holds a 4.9 average from 127 Google reviewers and is listed as an Insulation contractor in Tullytown, PA.
127 reviews
AGL Spray Foam
AGL Spray Foam maintains a 4.9 rating with 66 Google reviews and is categorized as an Insulation contractor in Sharon Hill, PA.
66 reviews
Mammoth Solutions
Mammoth Solutions records a 5.0 average from 22 Google reviews and is listed as an Insulation contractor in Feasterville-Trevose, PA.
22 reviews
Frequently asked questions
How should I choose an insulation contractor?
Start by checking recent customer reviews, confirming the contractor’s experience with the insulation type you want, and asking for multiple written estimates. Also verify licensing and insurance where applicable, and ask for references or examples of completed work so you can compare quality and scope.
What factors affect the cost of insulation work?
Cost depends on the size of the area, the insulation material chosen, access to the space (attic versus crawlspace), and whether air sealing or repairs are needed first. Get detailed line-item estimates that show material and labor separately so you can compare bids accurately.
What should I check before hiring an insulation contractor?
Confirm the contractor’s insurance, request a clear written estimate and project timeline, and ask how they handle cleanup and disposal. It’s also wise to check references and ask about warranties or guarantees on both materials and workmanship.
How was this ranking created and updated?
This ranking is based on Google review ratings and uses a Bayesian scoring method that balances average rating with the number of reviews, helping avoid overrating very small sample sizes. The list was compiled from Google-listed businesses and updated in 2026 to reflect recent review data.