Serving Uniondale, NY and surrounding areas
Approved
In business since 1982
Free estimates
Warranties offered
"One panel under our sun porch fell and dumped insulation every where."




Serving Uniondale, NY and surrounding areas
Approved
In business since 1982
Free estimates
Warranties offered
"One panel under our sun porch fell and dumped insulation every where."




Serving Uniondale, NY and surrounding areas
Approved
In business since 1999
Free estimates
Warranties offered
"We had a great result using them. I originally called because of an issue in a room with a bay window - it was very cold in the window, as though they didn't insulate properly underneath. They offered to come in and do the energy audit. Their recommendations were reasonable, and included a fix for the bay window insulation issue. There was no "hard sell". Their estimated savings for implementing the improvements were $1700 / year. We had the option to finance and roll the costs into our PSEG LI bill, or pay up front (and get a small additional discount).
I've recommended them to others, who have had similar positive results.
"





+68

Serving Uniondale, NY and surrounding areas
Approved
In business since 2021
Free estimates
Credit card accepted
"Zaza seal did a blown in insulation project for one of my bathrooms, yesterday. They were punctual, highly professional, and left the area where they did the work looking like it had never been touched, which was great. They cleaned up well, afterwards. The supervisor on the job, Anderson, could not have been nicer or more responsive to my questions."





Serving Uniondale, NY and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"We have a building and it is so old that it never had insulation in the walls. The winters were very uncomfortable because of the cold that would come thru the walls. Sound from the apartment above carried like the person above was right next to you. I called Ecorite and made an appointment with Danielle to have an estimate. Uri was on time and took measurements then gave us a written estimate. Big wow for us since most of the time we are given a verbal one that keeps changing until a contract is written. We told Uri our issues and he made suggestions. He explained the products and how they use them. Closed and open cell materials and what walls they need to go on. Next was the actual installation. We had to make some changes and Danielle made sure the contract was updated and I approved the changes. She made sure everything ran smoothly. When the workers were on their way Danielle made sure I knew it. When the Kenneth and Lucas (the workers) arrived they were on time and greeted us then introduced themselves. They were friendly and pleasant and they made us feel comfortable with their knowledge of the product, and respectful of our home. They instructed us on how to reduce or eliminate any incontinence to the other tenants of the building. During the installation they worked non-stop, until they broke for lunch. After lunch break they were in a hurry to get back to work. There was no slowness here; if I had to use a word I would use quickÂÂ. After the job was done they cleaned up and took out the trash (which for us is a big thing). The entire job was a pleasant experience. I will be calling back for the next apartment. If not for Homeadvisor I would not have found such a good company. We are very happy."

Serving Uniondale, NY and surrounding areas
Approved
In business since 2012
Free estimates
Warranties offered
We are J Synergy Green, a locally owned company serving our neighbors in Nassau, Brooklyn, Queens, and Richmond counties. We are approved by NYSERDA. We're comprised of industry veterans with more than 21 years experience in servicing and installing residential and commercial solar electric systems. We are also a New York Licensed Contractor with more than 10+ years of experience. We provide the highest level of quality, satisfaction, and value ensuring longevity and peace of mind. \n





+23

Serving Uniondale, NY and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
BuildingLI.com specializes in commercial construction, site intel, site assessment, direct hands-on work, and coordinated subcontracted licensed MEP technical assistance to owners, property managers, and facility services companies. We specialize in occupied-space renovations in commercial, medical and mixed-use active environments.





+172
Serving Uniondale, NY and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
Score Spray Foam is a family based business with over 50 years of experience in the construction business! Come to us for your insulation needs. There is no job to big or small.





+17

Serving Uniondale, NY and surrounding areas
Approved
In business since 2018
Free estimates
Small jobs welcome
Stone Quality Contracting is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 5 years of experience serving Suffolk County, NY and surrounding areas. There is no job too big, or too small for our team. Call today for a Free Estimate and let us put our experience to work for you!\nFollow us on Instagram @stone_quality_contracting and Facebook Stone Quality Contracting\nCall/Text (631) 978-3387\nEmail stonequalitycontracting@gmail.com





+17

Serving Uniondale, NY and surrounding areas
In business since 2015
Free estimates
Emergency services offered
"They showed up exactly when they said they would. They were efficient, neat and made sure to send me pictures in the various stages of execution. And they cleaned up better than when they found the area. I would highly recommend them. I wish he did more than insulation because he would be my go-to guy for all house related needs."





+119

Serving Uniondale, NY and surrounding areas
Free estimates
Emergency services offered
Credit card accepted
"The insulation crew was prompt, professional, and did a fantastic job installing my new insulation. I highly recommend this company for anyone in need of insulation services."





+16
Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.
R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.
Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.
You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.
Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.
From average costs to expert advice, get all the answers you need to get your job done.

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