4.3 
166 *The Angi rating for Insulation Service companies in Wilmington, DE is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
*The HomeAdvisor rating for Insulation Service companies in Wilmington, DE is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
Last update on September 29, 2025
Serving Wilmington, DE and surrounding areas
Approved
In business since 2006
Free estimates
Small jobs welcome
"Very professional! Michael explained our options for insulation. Was quick to respond to additional questions. Ontime and complete as expected. Great job!"
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."
Serving Wilmington, DE and surrounding areas
Approved
In business since 1981
Free estimates
Credit card accepted
"I have had good experience on a small project (installation of insulation blanket for basement) with Energy Services Group."
+4
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."
+6
Serving Wilmington, DE and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"I RECENTLY HAD MY ATTIC INSULATION REPLACED BY MASTER ATTIC. ALEX CAME OUT RIGHT ON SCHEDULE AND GAVE ME A FAIR PRICE. ( I DID HAVE 4 OTHER ESTIMATES) THE CREW LEAD BY ROBERTO WAS AMAZING. THEY WERE VERY CONSIDERATE, CAREFUL IN MAKING SURE THE AREA WAS SEALED OFF AND WERE VERY CAREFUL OF MY PERSONAL BELONGINGS. THEY DID A GREAT JOB IN REMOVING OLD INSULATION , VACUUMING OUT THE ATTIC ,SPRAYED AREA AND SEALED ANY OPENINGS. BEFORE THEY BROUGHT IN NEW INSULATION, THEY ASKED ME IF I WISHED TO TO VIEW THE ATTIC AND I DID. I WAS AMAZED EVEN AT THIS POINT, HOW CLEANED EVERYTHING LOOKED . (THIS INSULATION HAD BEEN UP THERE FOR 70 YEARS) NEW INSULATION WAS INSTALLED AND IT LOOKS GREAT. THE CREWED CLEANED UP EVERYTHING , EVEN VACUUMED THE AREA IN THE ROOM. ALL BAGS OF OLD INSULATION WERE REMOVED PROMPTLY AND I WOULD HIGHLY RECOMMEND THEM TO ANYONE."
+106
Serving Wilmington, DE 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..."
Serving Wilmington, DE and surrounding areas
Approved
In business since 1976
Free estimates
Credit card accepted
"I would recommend Phillips Insulation his crew was very professional, they showed up on time and they cleanup everything when completed the work"
Serving Wilmington, DE and surrounding areas
Approved
Super Service Award Winner
In business since 2005
Free estimates
Emergency services offered
"Joe and jason were very professional and made sure to clean everything perfectly while doing my attic insulation, I will be recommending them to everyone!"
+82
Serving Wilmington, DE and surrounding areas
Approved (Corporate)
In business since 1928
Free estimates
Credit card accepted
"Made quick work to remove birds from bent and installed cover to prevent it from happening in the future."
Serving Wilmington, DE and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"Was able to show exactly where leaks and poor existing insulation were causing energy loss."
+137
From average costs to expert advice, get all the answers you need to get your job done.
New insulation makes your home more comfortable and boosts energy efficiency. Use this guide to budget for insulation installation costs in Philadelphia, PA.
Attic insulation removal costs in Philadelphia, PA, vary based on multiple factors, including why you're removing it and how easy it is to complete the task.
The cost of blown-in insulation in Philadelphia, PA, varies depending on the type of insulation, labor, prep work, and more. Learn more about the cost factors in this guide.
Learn how to decide if your home needs dryer vent insulation to protect your vent from drafts and moisture that can make your energy usage less efficient. Poorly ventilated dryer vents also increase mold risks!
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