Google reviewers rate Econo Therm Insulation five stars based on seventy-six reviews, with the owner responding to eighty percent of them. Customers describe services including home energy assessments, air sealing, and blown-in insulation for attics, walls, and crawl spaces. Recurring themes highlight punctual arrival, clear communication, competitive pricing, and thorough post-job cleanup. The reviews consistently note that the crew answered questions and left properties clean, with no common criticisms identified in the provided excerpts.
Google rating: 5.0 out of 5 from 76 reviews (100% five-star).
Reviews on this page: 76 Google reviews (72 with written comments, 4 with photos).
Owner responses: the business replied to 80% of reviews.
Most recent review: October 2, 2026.
Service: Attic Insulation Service serving Williston Park, New York.
Data from Google, last updated October 25, 2026.
Photos
Customer reviews
5.0
★★★★★
76 reviews on Google
5★76
4★0
3★0
2★0
1★0
Reviews from Google, shown as published (original wording, unedited).
Michelle Nocerito2 reviews
★★★★★
Econotherm Daniel and Louis did home energy assessment at my mother’s home in Suffolk County. They did a home energy assessment on a home built in 1969 that was freezing in winter due to lack of insulation. They air sealed the entire two story home and blew in insulation on first and second story 360 degree wrap from the outside as well as built storage platform and insulation dam in attic which they filled with insulation as well as adding a tent at the drop-down stairs entry. They achieved a 40% reduction in lost airflow. The work was performed in one day with crew of 7. They were professional and neat. They left the home looking like nothing was done. On the patio they moved and replaced several large heavy planters along the back of the home and replaced all to original positioning and cleaned the patio surface leaving no trace of work. They also touched up the shingles on front of house following work so that the original weathered appearance was returned to the original look despite having to remove and replace a line of shingles to perform the work. We are extremely satisfied and recommend using their service if in need of improved energy efficiency in your home. Thank you Econotherm.
Response from the owner · 3 weeks ago
Hello Michelle,
We are glad that we were able to help you with your project. There will definitely be lower energy bills and the comfort level this winter will be like living in Florida. Thanks again for the kind words, it means so much to us.
Lou
Louis came in and reviewed my whole house, they came a few months later and insulated and air sealed everything! Wonderful work, great guys, they cleaned up after themselves amazingly and the price was excellent! I'm so happy we did this and can't wait to see how much better this house will be at retaining the cold/heat moving forward. We had no insulation in most of the house.
Daniel, Branley and their team were amazing, so friendly and they explained everything to me in great detail.
Highly recommended
Price assessment: Great price
Services: Service not listed
Response from the owner · a month ago
Hello Mike,
We are so pleased that we put a smile on your face. You and family are going to realize a tremendous difference in your home, as well as extra money in your pockets with the reduction of energy usage. It was a pleasure working for you,
Lou
OMG! Where do I start? I thought I had a problem with my insulation. I initially called another company who could not help me so they recommended Econo-Therm Insulation to me because they are specialists. I called them and Lou, an owner of the company, came to my house the very next morning and from the moment you met him you felt at ease. I immediately knew I had a person with knowledge and integrity in my home. He immediately looked in the attic. He took pictures of the insulation, my central air conditioner, etc.. He came down and showed me the pictures, explained everything thoroughly and nicely, and said my insulation was great. He explained why it was good. He gave me tips and suggestions. He answered all of my questions in a way I understood. He said I didn't have to have any work done. He was honest! He could have made up an invoice of work and told me anything but he didn't! He was HONEST! I even offered him a tip for coming and he would not accept it. He just does right by people. He drove an hour to my house in AM rush hour traffic and didn't leave with a dime but instead left knowing that he did right by me, a random potential customer. He says that he is able to sleep at night and this is because he always does right by people. This man, this company is the TRUTH! I haven't encountered too many companies like this but this man, Lou, will be blessed by GOD for ever because he treats people the way people should be treated. So honest, so knowledgeable, so respectful! Lou and Econo-Therm you guys will ALWAYS be the company I choose for all of my insulation needs! WOW!!!! Thank you!! God bless you, Lou! A++++
Response from the owner · a month ago
Hello Mr, Parham,
It was my pleasure assisting you today.
Regards,
Lou
By far the best insulation company and team to work with! I can’t thank Econo Therm Insulation enough for the incredible service they provided at a very reasonable price. Louis, Daniel, and the entire team were extremely thorough, detail-oriented, professional, respectful, and an absolute pleasure to work with from start to finish. The quality of their work and attention to detail really stood out. If you’re looking to repair, improve, or upgrade your home attic or crawl space, Econo Therm is the team to call. Highly recommend!
Price assessment: Great price
Response from the owner · a month ago
Hi Chad,
Thank you for the kind words, and taking a moment to write about your experience. You and family will definitely realize a tremendous difference in your home, as well as a healthier environment due to some critters. It was a pleasure working for you,
Lou
A very intelligent, loyal company. They were efficient, fast, and didn’t try to nickel and dime you. We strongly suggest Econo. Thank you for your services! :)
Response from the owner · a month ago
Hello Amanda,
Thank you for the taking the time to share your experience, if you ever need anything? Please feel free to reach out.
Regards,
Lou
If you happen to come across this review trying to determine despite their 90's looking website if Econo-Therm is legit and does quality work, the answer is an astounding yes to both. Late last year I had solicited two bids for an attic insulation job from local competitors, who of course sent out their A-team sales reps, and presented me with incredibly absurd proposals. I then came across Econo-Therm and gave them a call. Louis came out, we jumped in my attic, and he took a very thorough look and prepared a comprehensive bid right after. He detailed exactly what I wanted done without needing to ask, which is very refreshing to hear from any contractor. My ranch house's attic was woefully underinsulated with 50+ recessed lights. He proposed a solid plan: best effort air sealing along the ceiling plane, IC rated light covers + seal, remove the old TV antenna, capped a PVC pipe, mastic some of the ducting, fiberglass bat + tyvek the curtain walls, build a small platform near my air handler for the HVAC techs, and of course blow 12+ inches of L77 to top off the existing fiberglass and bring me up to let's call it R49+ across the entire attic. He provided a bid on the spot with extremely fair pricing. I scheduled the job and they came on time the day of. His son runs most of the installs I think. They came with 7 team members, finished the project in a half day, did a wonderful job and took a bunch of pictures along the way. They left no mess at all and required essentially no supervision. They also, free of charge, re-ducted two bathroom vent fans that were improperly done. Quality of work was excellent - house immediately felt more comfortable and I already saw reduced oil burn this last winter and lower electric costs this summer so far. Don't think twice; call Econo-Therm!
Response from the owner · 2 months ago
Hello Matthew,
Yes; it may be time to update the website !!!!! I guess it just shows how long we've been around " 1969". Those things get overlooked, lol
I'm happy we were and continue to put a smile on your face, and helped you save money. Thanks again for taking the time to share your thoughts.
Your friend,
Lou
Econo Therm Insulation just left my home & I'm so happy to have them insulate for me. Brantley & Daniel's crew was amazing! Very thorough, friendly, professional & welcomed questions. They caulked everything inside my 1974 home as well as insulating from outside with blown in cellulose, reducing my blower door results by 40%. I feel truly blessed to have this experience of a wonderful team working on my home.
Response from the owner · 4 months ago
Hello Denise,
We are a bunch of humble people here at Econo-Therm Insulation. I'm very happy you are very satisfied with the install of measures installed in your home today. We take great pride in what we do and treat each and every home as if it were one of our own. I have to give credit though to the great people of " Long Island Regional Clean Energy Hub" who put you in contact with us. If it were not for their initial contact with you, and them guiding you to a contractor that could service your needs. None of this would ever have happened. Sometimes in life, it just takes a great group of people with a common goal to make things happen.
My sincerest regards,
Lou
This Business is kind, caring and they get the job done . They were very efficient and cleaned up after themselves when they finish the job I would recommend this company to anyone.
Price assessment: Not sure
Services: Service not listed
Response from the owner · 4 months ago
Hello Miss. Nicholson,
Thank you for sharing your experience. You are going to realize a tremendous difference in your home. It was an absolute pleasure working for you and family.
Regards,
Lou
I don’t write reviews often. However, after having the team at econotherm insulation insulate my home I am beyond happy with the job they completed. They arrived at my home at 8:30 with three trucks and it was like watching a tight orchestra work on the outside and inside of my home! They answered any and all questions I had and went above and beyond from the minute they placed drop cloths on my floors till they mopped their way out. This is a family business that takes pride in what they do I would highly recommend them to anyone, no need to look any further. Thank you Louis and the team!
Response from the owner · 5 months ago
Hello Beth,
We are happy that you took a moment to share your experience. If you ever need anything from us? please feel free to reach out.
Regards,
Lou
I had Econotherm at my home this past winter, they insulated my attic and my exterior walls all I can say is they definably knew what they were doing such a great group of guys and so easy to work with, definably going to recommend to my neighbors and friends
Response from the owner · 5 months ago
Hello Gail,
Thank you for thinking of us. It was a pleasure making your home comfortable and energy efficient.
Regards,
Lou