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Find Insulation pros in Dover

Avatar for The Cozy Penguin Insulation Company
The Cozy Penguin Insulation Company
4.7(
60
)

Serving Dover, PA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"The work that Koala of Central Pa installed roof insulation at our church. The work was completed in a very professional manner. Work was done in a timely fashion."
Response time2 days
40 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Energy Smart Home Improvements, LLC
Energy Smart Home Improvements, LLC
4.6(
83
)

Serving Dover, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Small jobs welcome

"Very easy to work with. The owner himself came out to give me an estimate. Mark completed the actual insulation. He was quick and he did a great job cleaning up the area after doing the spray insulation. Highly recommend!"
 Air Leakage in your Home
 Blower door test to quantify air leakage
 Air infiltration through recessed light
 Duct leakage testing
 Attic air sealing

+6

Response time2 days
37 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for RetroFoam of Philadelphia
RetroFoam of Philadelphia
5.0(
21
)

Serving Dover, PA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"These guys were professional, on time and communicated very well... I would recommend this company to you for all your Spray Foam Insulation needs..."
RetroFoam Wall Insulation
Installing RetroFoam
RetroFoam with Siding
RetroFoam with Brick
Response time1 day
126 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Tri-State Builders
Tri-State Builders
4.6(
104
)

Serving Dover, PA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Stephen and his team did a fabulous job of insulating a space behind a bedroom wall and adjacent bathroom wall that was completely uninsulated. We suffered through two cold winters that heaters couldn't solve in these rooms. Stephen evaluated the project efficiently and then oversaw the work. It was performed beautifully by the team and they cleaned up before leaving. Everything was immaculate. Most impressed with this company and this project manager."
 Kitchen
Barber Addition
Rowland Addition
Custom Home
Traska Addition

+36

Response time4 days
14 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Mavrix Construction LLC
Mavrix Construction LLC
5.0(
3
)

Serving Dover, PA and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

At Mavrix Construction, we believe hiring a contractor should be stress-free. We specialize in professional spray foam insulation across Pennsylvania, managing every detail of your project from first call to final walkthrough.\n\nWe answer our phones. We show up when we say we will. We communicate every step of the way. And we don't consider a job finished until you're satisfied.\n\nOur commitment is simple — competitive pricing, quality work, and the kind of customer service that's rare in the trades industry.\n\nWhen you choose Mavrix, you're choosing a team that treats your property like our own.

Logo
77 neighbors recently requested a quote
Avatar for Orkin
Orkin
New to Angi

Serving Dover, PA and surrounding areas

Approved

In business since 1901

Free estimates

Warranties offered

Did you know that Orkin does Insulation? Our more than 100 years of pest control experience began in 1901 by then fourteen-year-old Otto Orkin. In that , we've become a leader Pest Control as well as an expert Home Insulation. Orkin - We can help energize your home. \n\n

Superior Insulation
4.9(
68
)

Serving Dover, PA and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"The gentlemen from Superior Insulation discovered a missing piece of duct work that was causing air from the cold air return of our geothermal heating unit to be pulling air from the unconditioned attic space above our second floor bedrooms.  My husband installed the duct work.
They put blown in insulation above our family room, above our second floor bedrooms and on top of duct work inside knee walls running the length of the house and also did spray foam insulation around some small doors into knee walls.
The work done by Superior Insulation decreased our energy usage by 40%.
We would recommend Superior Insulation to anyone.
"
Recommended by95%of homeowners
Avatar for Q Insulation Contractors, Inc.
Q Insulation Contractors, Inc.
4.8(
25
)

Serving Dover, PA and surrounding areas

In business since 2020

Free estimates

"Came on time for our thorough estimate. Was able to squeeze me in the next day to insulate my completely uninsulated detached garage. Great work! Got videos to see the work even better!"
Response time2 days
Recommended by92%of homeowners
Showing 1-10 of 39

FAQs for insulation service projects in Dover, PA

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.

The Dover, PA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

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