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TRUSTED BY DOVER, DE HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon52
    Verified insulation services reviews

Top-Rated Insulation pros in Dover - 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 Dover, DE and surrounding areas

Approved

In business since 2006

Free estimates

Small jobs welcome

"We decided to install insulation in the attic and crawl space a couple of months ago. We got an estimate from Mike and two other companies but he offered us the most competitive deal. Mike and his crew showed up on time, installed the insulation and cleaned up after the job was done. Communication was excellent throughout the entire process. We highly recommend Handyman Insulation for this kind of work."
Response time2 days
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for MSJ Attic Insulation
MSJ Attic Insulation
5.0(
6
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Dover, 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

42 neighbors recently requested a quote
Avatar for Dixie's Insulation, LLC
Dixie's Insulation, LLC
4.5(
49
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+1 more

Serving Dover, DE and surrounding areas

Approved

In business since 2006

Free estimates

Small jobs welcome

"I had Javier check to see if I needed new underbelly insulation on our mobile home. I could not crawl under the trailer to see if this work was needed. He could have taken advantage of the situation, but said all I needed was two patches and ground cover. They actually installed three patches with no additional cost. Honesty, integrity and professionalism are key to this business."
Installing Insulation and Poly in a crawlspace
Installing Insulation and Poly in a crawlspace
Crawlspace Job
Batts insulation
Batts insulation

+7

Response time3 days
34 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Sagittarius Airseal
Sagittarius Airseal
4.8(
31
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Dover, DE and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Edgar listened to my request to perform the tasks of insulating the HVAC ductwork and hotwater lines before installing the R30 batts in the joists. He did a good job in cleaning up the fallen insulation pieces from the floor, but there was still residual insulation dust on the floor and on my storage boxes. The tape he used to secure the ductwork insulation batts kept coming undone after he left, which I later re-taped myself. Overall, the quality of the work was great, but the cleanup could only be rated as 'Good'."
Blowing insulation
Blowing insulation
Blowing insulation
Blowing insulation
Blowing insulation

+38

Response time12 hrs
Response rate85%
12 neighbors recently requested a quote
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
509
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Dover, DE and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"The Crew was informative, pleasant, and easy to communicate with. Whenever I brought up an issue, they addressed it and made the necessary corrections. Joseph Stanley was Prompt, professional, and maintained great communication throughout the process"
Windows
Windows
Windows
Windows
Windows

+69

6 neighbors recently requested a quote
Recommended by49%of homeowners
Avatar for Lawson Home Services, LLC
Lawson Home Services, LLC
4.6(
60
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Dover, DE and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"We were extremely happy with our recent service. We really liked that he showed us the aspects of our dryer and vent and how we can keep it clean on a weekly basis. He was very tidy too! I would definitely recommend him and plan to have him return each year."
Metal Door Crawlspace Entrace
Turtl Crawlspace Entrance
Attic Air Leaks
Attic Air Sealing
Garage Loft Ready for Sprayfoam

+137

Response time9 hrs
146 neighbors recently requested a quote
Recommended by92%of homeowners
Showing 1-10 of 42
Insulation FAQs, answered by experts

Completing insulation service drastically improves indoor humidity control during hot, sticky Dover summers. Upgraded materials block moisture vapor and buffer the rapid temperature swings common during the spring and fall. Proper coverage also reduces infiltration from outdoor allergens and dust mites. Additionally, adding acoustic barriers to your walls and attic significantly dampens overhead noise from aircraft flying out of the local air force base.

Helpful?

Visible mold, musty odors, or moisture stains indicate an urgent need to redo your insulation service. In the humid DE climate, saturated materials lose their effectiveness and require complete replacement. Look for signs of pest tunneling or compression from rodents. Persistent drafts, winter ice damming at the eaves, or unexplainable spikes in your monthly utility bills also signal failing thermal barriers in your Dover home.

Helpful?

Routine maintenance for insulation service involves conducting comprehensive visual inspections twice a year. Check your attic for moisture damage in the spring after the Dover freeze-thaw cycle, and inspect again in November following hurricane season. Examine crawl space vapor barriers for tears or pooling water. Always clear bird and wasp nests from your soffit vents to maintain proper airflow throughout your home.

Helpful?

After completing insulation service, always schedule a final municipal building inspection to close out your permit. Next, hire a local HVAC professional to recalculate your home's heating and cooling load. Your equipment requirements change after major energy upgrades. Finally, verify that all soffit and ridge vents remain completely unobstructed, and monitor your indoor humidity to ensure it stays balanced for the DE climate.

Helpful?

Address immediate needs like moisture, mold, or winter pipe freeze risks right away to protect your home. Dover experiences high humidity, so compromised materials become a rapid mold hazard. If your current setup is functional but simply falls below modern DE energy codes, wait to schedule insulation service for the fall. September and October offer the best conditions before the heating season begins.

Helpful?

The Dover, DE homeowners’ guide to insulation services

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