John PerryA lot of folks focus on fixing up their yards with great landscaping or hiring maid services to keep things spotless indoors. But if your attic is leaking conditioned air, your utility bills can climb fast.
Figuring out how to keep your home warm in winter and cool in summer can be a real headache. That’s actually why finding the best attic insulation in Philadelphia matters for homeowners and property managers.
So, to help you out, I did the legwork and reviewed the best contractors for attic insulation in our city.
Read on to find out who can help you find the right material that can cut energy waste, reduce drafts, and make the whole house feel steadier year-round.
How much does attic insulation installation cost in Philadelphia?
Professional attic insulation installation in Philadelphia typically costs $1,781 to $2,500 on average, though full projects can stretch from $2,000 to $7,000 depending on attic size, access, and material.
| Material | Cost per Square Foot (Installed) |
| Blown-in / Cellulose | $1.00 to $4.00 |
| Batt / Fiberglass | $2.00 to $5.00 |
| Spray Foam | $1.50 to $5.00 |
| Radiant Barrier | $1.00 to $2.00 |
1. Philadelphia Spray Foam Insulation
Website: https://www.sprayfoaminsulationphiladelphia.com/
Address: 2359 N Park Ave Unit 3F
Contact: (215) 608-3873
Hours: Monday-Friday, 8:00 AM – 6:00 PM
Dealing with extreme seasonal weather means you need contractors who understand Philly’s hot, humid summers and freezing winters.
Philadelphia Spray Foam Insulation is strongest when the job calls for custom spray polyurethane foam (SPF), especially in awkward attic corners or spaces that need serious air sealing.
I like that their team can also step in when a previous foam job was done poorly, since fixing bad installation usually takes more patience than starting from scratch.
Their work is especially useful if you want to turn a drafty, uncomfortable space into a more stable one.
They have a narrow service focus, though. Since they stick to foam applications, homeowners who prefer blown-in cellulose, fiberglass batts, or a lower-cost material will need a different contractor.
Highly recommend this company
This company is the best. Deserves more than 5 stars. They offer tons of different services. My parents’ house needed renovations to their attic with insulation, and they did my parents’ crawl space too. No more mildew nor potential mold. I highly recommend this company to anyone that needs these services.
- D Swizzle | Google Review
Hard working, amazing attitude and fast working pace
Spray Foam Insulation Philadelphia did a wonderful job and I would like to thank them for their hard working, amazing attitude and fast working pace. I would recommend 100% to anyone who needs insulation work and would go through them again!
- Becca Hancock | Google Review
2. USA Insulation of Philadelphia
Website: https://usainsulation.net/
Address: 10 Colwell Ln, Conshohocken
Contact: (267) 551-1900
Hours: Monday-Friday, 8:00 AM – 5:00 PM
Reducing energy loss often takes more than adding material and hoping for the best.
USA Insulation of Philadelphia stands out for pairing its proprietary USA Premium Foam with targeted air sealing, which helps address drafty roof areas and other major leakage points around the home.
A neighbor of mine used them last winter and liked that the free inspection gave him a clearer sense of where heat was escaping. The company has been around since 1985, so there is real industry experience behind the pitch.
I like that they’re not limited to one method either, since blown-in insulation is available for homes that need a different fit.
Just be aware that their scheduling can be inconsistent, and a few customers have complained about post-job cleanup needing more attention.
Did an outstanding job
Had Dale and his crew from USA Insulation come and add to my attic blown in insulation to our home. They were very polite and professional, did an outstanding job, and made sure everything was clean and straightened up before they left. If I have any need of further insulation, I will definitely call USA Insulation again.
- PA State Constable | Google Review
Professional and neat
We had an additional 10″ cellulose installed in the attic and 2″ spray foam installed on the band joint around the entire house. The installers were professional and neat. From sale to the walk-through, they were very thorough. Steve the GM came out at the end of the installation to ensure everything was done correctly.
- Ray M | Google Review
3. Alligood Energy
Website: https://www.alligoodenergy.com/
Address: 166 W Coulter St
Contact: (215) 917-6578
Hours: Monday-Friday, 9:00 AM – 6:00 PM; Saturday, 10:00 AM – 7:00 PM
If you like seeing actual numbers before committing to a home upgrade, Alligood Energy is one of the more useful options on this list.
They start with a whole-home energy audit, using blower-door testing and infrared scanning to identify where heat is escaping. That data-driven approach feels practical because it keeps the project from turning into guesswork.
After the inspection, they provide a return-on-investment report so you can decide which upgrades should be made first.
They also work with several materials, including cellulose and mineral wool, which gives homeowners more flexibility than a foam-only contractor.
On the downside, execution can be uneven. Some customers have reported communication gaps between management and the installation crew, which occasionally led to rework or missed prep details.
Get the job done
We desperately needed attic insulation and landed on Alligood to help us get the job done. Andrew was helpful and answered all of my questions prior to the install. The team worked quickly and shared photos throughout the install, so we were confident that all of our bases were covered.
- Brian Aranda | Google Review
Brought us up to current energy standards
Great experience with Alligood Energy. They performed an audit and made recommendations. None of the other companies’ prices or overall approach compared with Alligood’s proposal. They showed up fast, kept everything very clean, and resulted in a 41% reduction in airflow leakage in our old house.
- Seth Goldenberg | Google Review
4. RetroFoam of Philadelphia
Website: https://www.retrofoam.com/
Address: 436 Industrial Dr, North Wales
Contact: (267) 869-3626
Hours: Monday-Thursday, 9:00 AM – 5:30 PM; Friday, 9:00 AM – 4:00 PM
Avoiding a major renovation is a big deal when you’re upgrading an older home. RetroFoam of Philadelphia makes that easier with proprietary injection foam designed to insulate existing spaces without tearing down walls.
I recently spoke with a property manager who brought them in for a tricky older building, and he liked that the non-toxic, odor-free material helped seal drafts without making the property feel like a construction zone.
Their product also serves as both insulation and an air seal, helping stabilize indoor temperatures and reduce energy use. They also handle basements and top-floor spaces, along with wall insulation.
The catch is follow-through. Some customers have complained about the slow scheduling of post-installation inspections, and a few felt the warranty support didn’t meet their expectations.
Took care of our blown in attic insulation
The two men that took care of our blown in attic insulation and spray foam insulation in the crawl space were courteous, professional, and helpful. I will provide an update on how much warmer our floors are and how much warmer both of our units are after the RetroFoam is installed in the walls.
- Tom Carroll | Google Review
Did an excellent job
The plumbing manifold in our utility room is on an external wall, which was very poorly insulated, so during cold snaps our pipes would occasionally freeze. We had RetroFoam assess the situation and insulate our wall and ceiling properly before winter. They protected the workspace and cleaned up after themselves.
- Kyle Christensen | Google Review
5. AGL Spray Foam
Website: https://aglsprayfoam.com/
Address: 1408 Calcon Hook Road, Suite C, Sharon Hill
Contact: (800) 957-1229
Hours: Monday-Saturday, 7:00 AM – 8:00 PM
Taking on a large residential upgrade or commercial build requires a team with more manpower than a small attic job.
AGL Spray Foam meets those needs because it works across the Greater Philadelphia region and focuses on high-performance foam applications.
It’s also notable that their project managers are trained in building science, so the conversation goes beyond simply choosing between open-cell and closed-cell materials.
They also look at the roof layout, diagnose heat-loss issues, and recommend the foam type that actually fits the structure. Overall, their precision can be valuable when you are coordinating with builders or architects.
Just be ready for the cost, since their premium foam usually means a higher upfront price than traditional fiberglass or cellulose.
On time and professional
This company did an awesome job re-insulating my attic ceiling. They were on time and professional for all of their appointments. The foam seems to be a much better insulator than the batt insulation, and my house has never been cooler in the summer and warmer in the winter.
- Jay Tarnoff, Ph.D. | Google Review
Insulated my attic
Robert and Donny from AGL came in today and insulated my attic to help us with issues in our new home. They were friendly and polite, fully explained the process, answered my questions, protected our belongings, and even vacuumed on their way out.
- John Biehl | Google Review
