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Newell and Crathern is a Loudon, NH insulation and weatherization contractor whose website lists spray foam, residential and commercial insulation, energy audits, ductless mini splits and window installation. BBB lists the LLC as incorporated in 1999 and managed by William Newell, with an A+ grade, and Google shows 4.6 stars from 48 ratings. A recent customer hired the company for air sealing and blow-in insulation following an energy audit, and wrote that the crew kept the workspace tidy and left everything exactly as it was. A 2026 customer wrote that Josh came out first to do the weatherization audit, and that a few weeks later the crew came back to insulate the attic and around the house and cleaned up before they left. A 2025 customer wrote that the team insulated the attic, basement and exterior walls after an energy audit by Steve Cotnoir, and also replaced a bathroom fan that had been installed incorrectly. A 2023 customer wrote that after air sealing, the company blew cellulose insulation into the attic and applied closed cell spray foam to two basement walls. A 2023 customer said the crew added a 10x10 crawl space not covered in the original plan, and that the house was one third more energy efficient afterward. A 2025 customer wrote that Jon, Kyle and Tristan installed a new mini split system to replace an outdated furnace. A 2026 customer said John from the HVAC department installed a hot water tank first thing the morning after the call. A recent customer wrote that in 2024 the Community Action Weatherization Program subcontracted the company to blow insulation under the floors and install a new propane heating system. That customer said several leaks were afterward found in the main waste drain pipe, that the problem was not promptly dealt with despite numerous attempts, and that mold growth and over $185,000 in damage followed, still unresolved. That customer also wrote that the heating system had been installed without the required permits and with code violations, according to the town building inspector. A customer who wrote in 2022 about a no-call, no-show on an appointment to fix repairs on a storm door the company installed updated the review in 2024 to say the company completely replaced the door at no extra charge.
“It is, I had Newell & Crathern.”
“Newell & Crathern, Yankee Thermal Imaging, A+ Energy Services, and Shakes to Shingles all have good reputations.”
“We used Newell and Crathern.”
In 2024, the Community Action Weatherization Program subcontracted with this company to blow insulation under my floors and also install a new propane heating system in my home. After they were done, several leaks were found in my main waste drain pipe resulting in human waste leaking throughout the insulation and contaminating all the floor boards. It was not promptly dealt despite numerous attempts to have them do so, which resulted in mold growth throughout my home, and over $185,000 in damage which is still unresolved. After that damage, it was found that the heating system they installed was deemed a fire and combustion hazard, as it was installed without the required permits, insufficient clearances, incorrect roof jack and venting, improper wiring, all code violations, as verified by my town building inspector, which also invalidated the warranty, causing additional monetary damages and leaving me with no heat.
I recently had the pleasure of working with Newell and Crathern, and I am thoroughly impressed with both their business acumen and the quality of work they deliver. From the initial consultation to the final execution, every step was handled with the utmost professionalism and a keen attention to detail. The team at Newell and Crathern went above and beyond to understand my unique needs and tailored their services to ensure exceptional results. Their commitment to excellence is evident in the innovative solutions they provided, which have significantly contributed to the project's success. I wholeheartedly recommend Newell and Crathern to anyone seeking a reliable and expert partner for their weatherization needs.
I recently hired Newell and Crathern to handle air sealing and blow-in insulation following my energy audit, and I am very pleased with the quality of their work. The team— Steve, Jacqui, Josh, Ryan, Kyle, Zach, and others — were outstanding. They were professional, polite, and showed a great deal of respect for my home throughout the entire process. The crew was incredibly thorough and took the time to ensure the job was done right, maintaining a high level of attention to detail. They kept the workspace tidy and left everything exactly as it was when they arrived. It is clear that Newell and Crathern prioritizes customer satisfaction and professional standards. I really appreciate the service and the positive attitude of everyone involved in the project. If you are looking for a company that is thorough, polite, and professional, I highly recommend them!
Had a really great experience with Newell Crathern! Josh came out first to do the weatherization audit and was super easy to talk to, he explained everything in a way that actually made sense and didn’t feel pushy at all. A few weeks later, the crew came back to do the insulation work in my attic and around the house. Shoutout to Ryan, Kyle, Tristan, Ron, and Nate (aka “Nate the Great”) they were all awesome. Friendly, respectful, and clearly knew what they were doing. They worked hard, got everything done efficiently, and cleaned up before they left. Overall just a really smooth process and a solid team. Definitely glad I went with them and would recommend them to anyone looking to make their home more energy efficient!
john from HVAC department was very fast and convenient with my hot water tank. I called them the night before and they offered to come and hook up a temporary one, I didn't need it . They were there the next morning first thing and installed it very quickly and professionally.
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3 changes recorded — last scanned Sep 30, 2026.
