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TRUSTED BY WILMINGTON, DE HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon173
    Verified insulation services reviews

Top-Rated Insulation pros in Wilmington - Updated Nov 2026

Avatar for Insulation Guyz
Insulation Guyz
5.0(
82
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Wilmington, DE and surrounding areas

Approved

In business since 2006

Free estimates

Small jobs welcome

"Mike and his assistant were very professional. They worked until eight at night to complete the job, (excellent work ethics ) both were very courteous and pleasant and a pleasure to have working at my home. The insulation in my pole barn turned out perfect, and I couldnâ t be happier. I will use them again for future projects. Rob W"
Response time2 days
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for G.E.G. Enterprises, LLC
G.E.G. Enterprises, LLC
4.4(
205
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Wilmington, DE and surrounding areas

Approved

Super Service Award Winner

In business since 1999

Free estimates

Credit card accepted

"G.E.G. did a great job installing blow in insulaltion in my attic. They were quick and prepared. My only wish is they would have been able to pull up more of the unused attic flooring and gotten more insulation under it, though they were able to increase insulation in other areas."
Blown-In Attic Insulation
Response time1 day
53 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for MSJ Attic Insulation
MSJ Attic Insulation
5.0(
7
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Wilmington, DE and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Did a great job on the insulation however they left a hole in the ceiling when they dropped something on the attic floor. Not a big deal but they need to be careful. Overall, amazing work they do all kinds of insulation and they also install radiant barriers on roof joists. They are reasonably priced and the crew is super friendly, pleasure to work with."
Business card
Poorly insulated
Poorly insulated
In progress
Radaint barrier

+6

43 neighbors recently requested a quote
Avatar for Master Attic, LLC
Master Attic, LLC
4.8(
61
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInsulation - Install or Upgrade

Serving Wilmington, DE and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Contacted Master Attic via Angi and Alex, the technician came to evaluate our attic and crawl space (2 separate spaces in our house). We heard critter noises and our upstairs was hot in the summer. The insulation was original to the ~30 year old house, so we know it's about time to get it done. Alex checked both spaces and showed us photos of problem areas. We have an estimate and Alex explained the details of the work involved. The team came within the week (we lucked out to take the spot of a cancellation), and everything was done as expected. There was a lot of work to remove old insulations, vacuum all debris, sanitize the space, seal all air gaps, install baffles, rodent proof, and install new insulation. The work was completed in around 6 hours, the spaces are now clean and tidy - quite unbelievable given how they were before. We went for the heavier insulation which is reflected in the project cost."
Crawlspace remediation, new batt insulation and moisture barrier encapsulation
Old insulation removal and replace with new batt insulation
Rodent hole on corner of roof
New Blown-in insulation
Crawlspace remediation, new insulation & moisture barrier encapsulation

+106

Response time2 days
Response rate100%
15 neighbors recently requested a quote
Avatar for RetroFoam of Philadelphia
RetroFoam of Philadelphia
5.0(
22
)
Spray Foam Insulation - InstallInjection Insulation - Install

Serving Wilmington, DE 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
Response rate100%
125 neighbors recently requested a quote
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
515
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Wilmington, DE and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"Home Genius Exteriors did a great job on my gutters. It was extremely fast and easy to be honest. I was really surprised at how quick the process was. The project manager met with me and we did a walk-through. I was truly satisfied with the work that was completed."
Windows
Windows
Windows
Windows
Windows

+69

22 neighbors recently requested a quote
Recommended by49%of homeowners
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Insulation FAQs, answered by experts

To establish a seasonal inspection routine in Wilmington, start each spring by checking attic insulation for winter moisture or damage. In summer, monitor crawl spaces for excess humidity. Inspect air sealing and vents in the fall to prepare for colder months, and during winter, look for cold spots or ice dams. Monthly, note any unusual odors or changes in energy use to catch insulation issues early.

Helpful?

Completing an insulation service project in Wilmington enhances home comfort by stabilizing indoor temperatures, reducing drafts, and improving air quality. Proper insulation minimizes outside noise and helps control humidity, which is especially important during Wilmington’s humid summers. You’ll experience fewer cold spots in winter and less heat intrusion in summer, making your home more energy efficient and consistently comfortable year-round.

Helpful?

After completing an insulation service project in Wilmington, schedule a walk-through with your contractor to verify that all attic insulation and wall insulation are properly installed and sealed. Track your home’s energy bills for noticeable changes in efficiency. Check for any drafts or uneven temperatures in living spaces, and inspect for signs of moisture or settling in newly insulated areas. Keep all service records and warranty paperwork organized for future reference.

Helpful?

In Wilmington, insulation maintenance involves checking attic insulation for compression, ensuring crawl spaces remain dry, and inspecting for pest intrusion, especially after heavy rain or seasonal changes. Look for gaps or damage in insulation materials, and confirm that ventilation is unobstructed to prevent humidity buildup. Scheduling a professional assessment every few years helps maintain home efficiency and prolongs the lifespan of your insulation.

Helpful?

In DE, the short-term benefits of insulation service include immediate improvements in home efficiency, reduced drafts, and better temperature control. Over time, you’ll notice increased property value, a healthier indoor environment with less risk of mold or pests, and lower maintenance needs. Enhanced insulation also supports quieter living spaces and contributes to a reduced environmental impact, making your home more comfortable and resilient for years to come.

Helpful?

The Wilmington, DE homeowners’ guide to insulation services

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