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Serving Portsmouth, NH and surrounding areas. (603) 956-1359
Cold rooms, climbing heating bills, and ice dams are not quirks of an old house - they are fixable problems. We insulate attics, walls, basements, and crawl spaces for Portsmouth homeowners who are ready to be comfortable.
Home insulation in Portsmouth covers every area where heat escapes - attic, walls, basement, and crawl space - using blown-in, batt, or spray foam materials matched to each location. Most single-area jobs finish in one day.
Portsmouth sits in one of the colder climate zones in the continental U.S., and the city has a large share of homes built before 1960 that were never insulated to today's standards. If your heating bills feel out of proportion to the size of your home, or if certain rooms never quite warm up, the insulation is almost always involved. A full home insulation assessment looks at every area at once so you understand the whole picture, not just the attic. Many Portsmouth homeowners start there, then address walls or the crawl space in a second phase once they see the difference. If older insulation has settled or been damaged, we can also handle insulation removal before the new material goes in.
Portsmouth winters are long and genuinely cold, but if your heating costs seem high compared to neighbors in similar-sized homes, under-insulated walls and attic are a likely cause. Heat rises and escapes through the attic faster than anywhere else, and every hour the furnace runs to compensate costs you money.
If certain bedrooms, the top floor, or rooms over a garage or crawl space stay noticeably cold in winter, uneven or missing insulation is often the reason. This is especially common in Portsmouth's older homes, where insulation was added piecemeal over the years or never added at all in certain areas.
Hold your hand near an electrical outlet on an exterior wall on a cold day - if you feel cool air, that wall cavity has little or no insulation. Drafts along baseboards or around window frames are another sign that heat is escaping. These are fixable, not just quirks of an older house.
Ice dams form when heat escapes through an under-insulated attic and melts roof snow unevenly. Portsmouth homeowners who have dealt with ice dams - or the water stains they leave inside - almost always benefit from an attic insulation and air-sealing assessment. Fixing the source is far less expensive than the ongoing repairs.
We cover every area of your home where insulation matters. For attics, we use blown-in fiberglass or cellulose that fills irregular spaces completely - always combined with air-sealing first so warm air cannot bypass the insulation through gaps around fixtures and pipes. For walls in older Portsmouth homes, retrofit blown-in insulation is installed through small holes that are patched cleanly after the work. We also offer air sealing services as a standalone job for homes that need gap-filling before or alongside insulation work.
Basements and crawl spaces are areas that many Portsmouth homeowners overlook, but they are a significant source of cold floors and moisture-driven heat loss. Spray foam works well in tight crawl space framing where other materials are difficult to install properly. If you are not sure which area of your home needs the most attention, the assessment visit will make that clear. You can also review our insulation removal service if existing material needs to come out before new insulation can go in.
Best starting point for most Portsmouth homes - reduces heat loss and prevents ice dams.
Retrofit option for older homes where exterior walls have little or no insulation behind the siding.
Addresses cold floors and moisture-driven heat loss in the lower areas of your home.
Combined service that seals gaps first, then installs insulation for the greatest comfort improvement.
Portsmouth is one of the oldest cities in New England, and that history shows in the housing stock. A large share of homes here were built before 1960 - many in the South End and around Strawbery Banke date back much further. Homes of this age were rarely built with adequate wall insulation, and whatever was added to the attic over the decades may have settled, degraded, or been disturbed by pests or renovation work. Portsmouth's location on the Piscataqua River and close proximity to the Atlantic also means higher humidity than inland New Hampshire communities - moisture is insulation's enemy, and a contractor working here needs to account for vapor management, not just R-value.
We serve homeowners across Portsmouth and the surrounding Seacoast region. If you are in Kittery or Newburyport and dealing with the same cold-home and ice-dam issues that Portsmouth homeowners face, all of the same services apply. We can typically schedule an initial assessment within a few days of your first contact.
We respond within 1 business day. We will ask a few basic questions - the age of your home, what areas concern you, and what you have noticed - so we arrive prepared rather than starting from scratch.
A technician walks through your home and inspects the attic, basement, crawl space, and walls as needed. They measure what is already there, check its condition, and look for air gaps. This visit is free and typically takes 30 to 60 minutes.
You receive a clear written estimate covering materials, labor, and whether your project qualifies for a NHSaves rebate. Take time to compare it - a contractor who is confident in their price will not rush you to sign.
The crew protects your home, completes the work, and provides documentation of what was installed and where. You will typically notice a difference in comfort within the first cold snap after the work is done.
We respond within 1 business day. There is no obligation - just a clear picture of what your home needs and what it costs. After submitting, someone from our office will call to schedule a free in-home assessment.
(603) 956-1359Older Portsmouth homes bring real variables - knob-and-tube wiring, limited attic access, original plaster walls, and coastal moisture. We assess these conditions before quoting so there are no mid-job surprises and the price you see is the price you pay.
New Hampshire licenses insulation contractors through the Office of Professional Licensure and Certification. Working with a licensed contractor protects your ability to claim NHSaves rebates and ensures the work meets state standards - ask for the license number before signing anything.
Insulation without air-sealing is like putting a coat on a house with open windows. We seal gaps around light fixtures, plumbing penetrations, and framing before any insulation goes in - it is the step that makes the biggest difference in your heating bills.
Heating season in Portsmouth starts in October and runs through April. We respond to every inquiry within one business day so you are not waiting weeks to get a conversation started. The sooner we assess, the sooner you are warm.
We document every job clearly so you have something concrete to show for your investment - useful for NHSaves rebate applications and for future home sales. The ENERGY STAR home sealing guide is a good resource for understanding why air-sealing and insulation work together, and the Building Performance Institute sets the standards we use to evaluate insulation quality.
Old or damaged insulation needs to come out before new material can do its job - we handle safe removal and disposal.
Learn MoreSealing gaps and cracks in your home's shell before adding insulation is what separates a good job from a great one.
Learn MoreContact Advanced Portsmouth Insulation for a free home insulation assessment - Portsmouth homeowners who schedule before peak season get on the calendar first.