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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon34
    Verified insulation services reviews

Find Insulation pros in Greencastle

Avatar for RetroFoam of Philadelphia
RetroFoam of Philadelphia
5.0(
22
)

Serving Greencastle, PA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"We are extremely satisfied with the whole process of our house being insulated. First we had the walls done, and then a couple weeks later we had our attic insulated. The crew were so nice, friendly, and knowledgeable. We are very satisfied with everything. Thank you, everyone."
RetroFoam Wall Insulation
Installing RetroFoam
RetroFoam with Siding
RetroFoam with Brick
Response time1 day
136 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Tri-State Builders
Tri-State Builders
4.6(
104
)

Serving Greencastle, PA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"On time, courteous, clean and efficient. Foamed and drywalled the garage efficiently, and cleaned up well after the job. Provided advise on issues seen during insulation preparation. Great service."
 Kitchen
Barber Addition
Rowland Addition
Custom Home
Traska Addition

+36

Response time4 days
10 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.8(
486
)

Serving Greencastle, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Warranties offered

"My wife and I are very happy with our new roof. It was done in one day. The crew and project manager were knowledgeable and friendly. All my questions were answered during the walkthrough. Great service provided by Home Genius Exteriors. Would highly recommend."
Gutters
Gutters
Gutters
Gutters
Gutters

+88

Recommended by94%of homeowners
Avatar for Mavrix Construction LLC
Mavrix Construction LLC
5.0(
3
)

Serving Greencastle, 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 Keystone Enviro Systems
Keystone Enviro Systems
5.0(
2
)

Serving Greencastle, PA and surrounding areas

Approved

In business since 2003

Free estimates

Small jobs welcome

Keystone Enviro-Systems is a small family owned business. We specialize in cellulose and fiberglass insulation. We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

Roof Line Dense Pack
Roof Line Dense Pack
Response time4 days
13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for USA Insulation of Harrisburg
USA Insulation of Harrisburg
4.9(
19
)

Serving Greencastle, PA and surrounding areas

In business since 2020

Free estimates

Warranties offered

"I had several options to pursue in finding a remedy for my hot attic. After meeting with the insulation consultant who was extremely knowledgeable, patient, and provided detailed explanations of how to insulate I knew proceeding with the job was the right decision. My attic is noticeably cooler and I highly recommend USA Insulation Tri -State"
Spray Foam Insulation
2" Closed Cell Spray Foam
4" Open Cell Spray Foam / Trimmed
4" Open Cell Spray Foam / Trimmed
4" Open Cell Spray Foam / Trimmed

+13

Recommended by95%of homeowners
Avatar for Q Insulation Contractors, Inc.
Q Insulation Contractors, Inc.
4.8(
25
)

Serving Greencastle, 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
Accurate Insulation - Home Facebook
4.2(
152
)

Serving Greencastle, PA and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"My house is a little wacky and the proposal was to include all of the crawl space and ceiling surface area. Sadly there was no way to know that a portion of both were inaccessible to insulate. Was hoping to fix issues with freezing pipes by insulating but that is the part they could not access. The scheduling and some staff on the phone is a little dry on the phone. The crew who came to do the job worked their butt off and were super nice. CJ, who drew our proposal, was very nice and knowledgeable. He warned me that his estimation might be a little off but the estimation of the Pepco energy saving percentage back ended up being way off after the energy audit. That made the job much more costly than predicted and I had not planned for that. He was willing to adjust the bill slightly but not significantly enough to really make a difference. Overall, it is going to make a huge difference in the comfort in the house and the crew was very professional."
Response time2 days
Recommended by97%of homeowners
Avatar for Handy Development llc
Handy Development llc
4.9(
9
)

Serving Greencastle, PA and surrounding areas

In business since 2019

Free estimates

Credit card accepted

"The team arrived slightly early to be well prepared to start the job on time. As they began they laid down protective barriers to keep the home clean. While in the attic they blew in the insulation with an even consistent barrier, ensuring that all locations with infrastructure were well covered. As they wrapped up the job, they cleaned behind them as they closed up the attic, removed the floor coverings and were on their way. The only way I can tell they were here is that the heat runs less in the winter and the air conditioning runs less in the summer. I would recommend this process and this team to anyone who owns a home and has not insulated their attic."
Fairfax va Install
Martinsburg wv ( Attic barrier
Martinsburg solar fan installed
Winchester Va radiant install
Salem Virginia install

+45

Recommended by100%of homeowners
Avatar for Bullseye Garage Doors & Insulation
Bullseye Garage Doors & Insulation
5.0(
9
)

Serving Greencastle, PA and surrounding areas

In business since 2025

Free estimates

Emergency services offered

"They were honest. They came on time and their prices were reasonable. They went out of their way to help me and were so accommodating. They vacuumed and cleaned up and used foot protection to keep our house clean."
Avante Glass Door
Ben, owner of Bullseye Garage
Our state of the art trucks are fully loaded and ready to handle any of your garage door needs
Canyon Ridge Elements - Woodgrain Overlay
Bridgeport Steel - Wood Grain Overlay

+1

Recommended by33%of homeowners
Showing 1-10 of 23
Insulation questions, answered by experts

At a minimum, blown-in insulation lasts 20 to 30 years. Cellulose and sheep’s wool come from natural materials, so they likely max out at around 30 years. Fiberglass and rockwool feature artificial materials that boast lengthy lifespans, up to 50 years, or even longer in some cases. As always, this timeline assumes you don’t run into any issues, such as flooding or mold, that shorten the lifespan.

One of the clearest signs that your insulation isn’t working as well as it should be is a noticeable difference in temperature throughout your home. One room might feel icy while another is hot as Arizona—this indicates that some parts of your home are either retaining or losing heat more than others. Additionally, a sudden increase in your energy bills, evidence of pests or rodents, or evident water damage are other signals that warrant a thorough inspection of your insulation and potential replacement.

Adding insulation to ceilings is an excellent way to increase the energy efficiency of your home. If your home's layout is such that you need insulation in the ceilings rather than in the roof, it's likely that at least some insulation already exists in the space. However, each additional inch of insulation you can add boosts the R-value by between 2.2 and 4.2.

Yes, you can install insulation over ductwork, and doing so can save you money. Without insulation, the HVAC unit must work harder to force warm or cool air around the home, and once the air reaches the vent, it may not be the correct temperature. Insulating HVAC ducts makes your system work more efficiently, saving you money on heating and cooling bills.

It is possible to insulate your walls without removing drywall, but it’s not a good idea to attempt the work yourself. A professional can use blown-in insulation or spray foam insulation to fill wall voids without opening up the walls, and the option they use typically depends on your climate and whether or not there’s insulation in your wall already that can remain in place. Spray foam insulation costs more and isn’t always a viable option, but it’s a better insulator. Call in an expert to help decide which is right for you.

The Greencastle, PA homeowners’ guide to insulation services

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