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Serving Portsmouth, NH and surrounding areas. (603) 956-1359
Your existing home can hold heat the way a newer home does - without tearing out walls or moving out. We add insulation where you need it most and handle your NHSaves paperwork.
Retrofit insulation in Portsmouth, NH means adding insulation to a home that is already built - filling attics, walls, crawl spaces, and rim joists using methods designed for occupied homes, with most projects completed in one to two days and no need to move out.
Portsmouth has one of the oldest housing stocks in New England. If your home was built before 1980, there is a good chance it is losing heat in ways you can actually feel - rooms that never quite warm up, bills that spike hard every November, and ice dams appearing at the roofline after the first heavy snow. Retrofit insulation addresses all of these problems at the root.
For the best results, we typically recommend pairing retrofit insulation with attic air sealing - because adding insulation without sealing air leaks first leaves real performance on the table.
If your gas or electric bill climbs sharply from November through March, your home is not holding heat the way it should. Portsmouth winters are long and cold, and a well-insulated home should maintain comfortable temperatures without the heating system running all day. Under-insulated attics and walls are two of the most common causes.
A bedroom above the garage, a back room, or any room at the end of the house that stays noticeably colder than the rest is a classic sign of missing or inadequate insulation in that area. Heat moves toward cold, and poorly insulated rooms lose their warmth faster. This is especially common in Portsmouth's older homes where insulation was installed unevenly or not at all.
Ice dams - those ridges of ice that build up at the roof edge after a snowfall - are a direct sign that heat is escaping through your attic and melting snow unevenly. Portsmouth gets enough snow and cold that ice dams are a recurring problem for homeowners with under-insulated attics. Left unaddressed, they can force water under shingles and into the house.
Hold your hand near an electrical outlet on an exterior wall on a cold day. If you feel cold air coming through, that is a sign of air leaks and missing insulation in the wall cavity behind it. Drafts along baseboards or near window frames are another common signal - these are energy losses you are paying for every month.
The attic is almost always the first place we look, because heat rises and attic improvements deliver the highest return. We blow in cellulose or fiberglass to bring your attic up to the insulation level your home needs for Portsmouth's climate. For homes where existing insulation is old, compressed, or contaminated, we can remove it first and start fresh. We always seal air leaks before adding insulation - because adding material over unsealed gaps is like putting a thick blanket over a drafty window. Spray foam insulation is another option for certain areas where a seamless, moisture-resistant seal is the priority.
For wall insulation, we drill small holes from the exterior or interior, pack the wall cavities with insulation, and patch the holes so they are barely visible afterward. Rim joists - the band of wood that sits on top of your foundation - are a significant source of heat loss that most homeowners never think about, and we address those as part of a whole-home upgrade. We also tie in home insulation planning so that every area of your house works together rather than leaving gaps in coverage.
Best for homeowners whose biggest complaint is high heating bills and cold upper floors - the attic is where you get the most improvement for the investment.
Best for older Portsmouth homes with little or no wall insulation - blown in through small holes with minimal disruption to your interior finishes.
Best for homes with cold floors in winter and a crawl space or unfinished basement - addresses heat loss at the foundation level that insulation above rarely reaches.
Best for homeowners who want to address every area in a single coordinated project - air sealing, attic, walls, and foundation in one visit to maximize NHSaves rebate eligibility.
Portsmouth sits in a climate zone where heating season runs from October through April and temperatures regularly drop into the single digits. The city also has a large number of homes built before 1940 - Colonial, Federal, and Victorian-era properties that were constructed long before modern insulation standards existed. Many of these homes have never had a meaningful insulation upgrade. Contractors working in Portsmouth also need to pay close attention to moisture management because of the city's coastal location along the Piscataqua River - wet insulation loses its ability to perform and can lead to mold inside walls and attics.
We work throughout the Seacoast region, including in Dover and Durham, where older homes face many of the same heating challenges. The financial case for acting is strong right now - New Hampshire's NHSaves program offers meaningful rebates for qualifying insulation work, and those amounts can change year to year.
We ask about your home's age, which areas concern you, and whether you have noticed specific problems like drafts or high bills. We reply within one business day and can schedule an in-home assessment within one to two weeks.
We check the attic, exterior walls, crawl space, and rim joists - noting how much insulation is there, where the air leaks are, and whether any moisture issues need addressing first. You receive a written estimate before any commitment.
Once you have the estimate, we walk you through what rebates are currently available through NHSaves and your utility provider. The estimate clearly lists what areas will be insulated, what materials will be used, and whether air sealing is included.
The crew sets up, protects your floors and furniture, and completes the work - typically in a single day. Before leaving, we walk you through the completed job. In the attic, you will see even, consistent coverage. We handle the rebate paperwork so you do not have to.
No pressure, no obligation. Written estimate and honest answers about what your home actually needs. We reply within one business day.
(603) 956-1359Portsmouth's pre-1940 Colonial, Federal, and Victorian homes present real challenges - balloon framing, plaster walls, and decades of layered renovations. We have worked on enough of these properties to handle them carefully, preserving original details while delivering a genuine performance improvement.
We are enrolled in the NH Home Performance with ENERGY STAR program. That means our work qualifies for rebates from Eversource and Liberty Utilities, and we handle all the documentation - so you are not leaving money on the table.
New Hampshire requires insulation contractors to hold a current state license through the Office of Professional Licensure and Certification. We are fully licensed and insured, which protects you if anything goes wrong and keeps your homeowner's insurance valid.
Portsmouth's coastal humidity makes moisture management a real part of every insulation project. We install insulation in a way that does not trap moisture inside walls or attics - so you get the performance benefit without creating conditions for mold or rot down the road.
Local knowledge, proper licensing, program enrollment, and a careful approach to moisture - these are the things that separate a retrofit project that actually holds up from one that creates new problems. We bring all of them to every job.
A seamless, moisture-resistant option for areas where blown-in insulation is not the right fit - especially crawl spaces, rim joists, and irregular cavities.
Learn MoreA whole-home view of your insulation needs across every area - attic, walls, basement, and crawl space - for homeowners who want to address everything at once.
Learn MorePortsmouth heating season is long. Book your free estimate now and lock in your project before winter - NHSaves rebates are available while program terms hold.