Matt and John did an excellent job with the spray foam insulation in my attic. They were very professional, thorough, and clearly took pride in their work. What impressed me the most was how carefully they worked around all the tight and difficult areas to make sure everything was properly sealed.
They didn’t just spray the easy spots—they made sure the hard-to-reach areas, pipes, and corners were well covered so the space is fully air-sealed. The attention to detail and effort they put into making sure everything was sealed properly really shows.
I truly appreciate the quality of their work and their professionalism throughout the job. I would highly recommend... read full review
December 2025
GNI did a professional job from start to finish! We are very happy and have noticed a difference in the overall heat distribution within our house! Just on the phone (my first call/before visiting), Jason explained the various options for insulation, what the installation team does, associated costs and R values. When Jason came to see the attic, he was on-time and he explained clearly and simply what was required to bring it up to current code. The team that came in to do the work was also on-time, worked very efficiently and quietly. When they finished, they took a picture for me and explained (again, since I asked) what they had done. Wonderful experience and... read full review
August 2025
Had our attic insulated by GNI and very impressed with the work done! My only issue is the miscommunication between the office, sales, and workers. There were discrepancies in what information was relayed to me about the job and timing. However that aside, the job was done well, pricing was reasonable, and we noticed a significant difference in cooling since the insulation was done! Thank you for everything.
Matt and John did an excellent job with the spray foam insulation in my attic. They were very professional, thorough, and clearly took pride in their work. What impressed me the most was how carefully they worked around all the tight and difficult areas to make sure everything was properly sealed. They didn’t just spray the easy spots—they made sure the hard-to-reach areas, pipes, and corners were well covered so the space is fully air-sealed. The attention to detail and effort they put into making sure everything was sealed properly really shows. I truly appreciate the quality of their work and their professionalism throughout the job. I would highly recommend... read full review
GNI did a professional job from start to finish! We are very happy and have noticed a difference in the overall heat distribution within our house! Just on the phone (my first call/before visiting), Jason explained the various options for insulation, what the installation team does, associated costs and R values. When Jason came to see the attic, he was on-time and he explained clearly and simply what was required to bring it up to current code. The team that came in to do the work was also on-time, worked very efficiently and quietly. When they finished, they took a picture for me and explained (again, since I asked) what they had done. Wonderful experience and... read full review
Had our attic insulated by GNI and very impressed with the work done! My only issue is the miscommunication between the office, sales, and workers. There were discrepancies in what information was relayed to me about the job and timing. However that aside, the job was done well, pricing was reasonable, and we noticed a significant difference in cooling since the insulation was done! Thank you for everything.