4.4 
81 *The Angi rating for Insulation Service companies in Delaware City, 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 Delaware City, 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 August 31, 2026
Serving Delaware City, DE and surrounding areas
Approved
In business since 2006
Free estimates
Small jobs welcome
"They were punctual and explained what was to be done. The job done was a room over the garage that that needed insulation."
Serving Delaware City, 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 Delaware City, 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 Delaware City, 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 Delaware City, 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 Delaware City, DE and surrounding areas
Approved
In business since 1976
Free estimates
Credit card accepted
"Provided excellent recommendations and completed the work in a satisfactory manner."
Serving Delaware City, DE and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"Friendly Knowledge Answered all questions"
+137
Serving Delaware City, DE and surrounding areas
Approved (Corporate)
In business since 1928
Free estimates
Small jobs welcome
"Came out promptly - same day, on a Saturday, to remove a hornets nest because I have a bee sting allergy. Very courteous"
Serving Delaware City, DE and surrounding areas
In business since 1977
Free estimates
Credit card accepted
"Unfortunately, when the techs started the process, the insulation already in the walls prohibited the addition of the foam. I cannot begin to tell you how disappointed I was, as the job they had done on our tiny addition was remarkable. However, isn't it wonderful to have a company tell you the truth!"
Serving Delaware City, DE and surrounding areas
In business since 2020
Free estimates
Warranties offered
"Highly recommend Koala insulation to anyone in need of insulation services. Matt was prompt, friendly and examined all options. During the day of sevuce, the installation crew showed up on time , examined the process, worked quickly and cleaned up after. Their prices and quality cannot be beat and its not easy to find high quality at such a price. Thank you!"
From average costs to expert advice, get all the answers you need to get your job done.
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