Loading...
Serving Portsmouth, NH and surrounding areas. (603) 956-1359
Cold spots near your walls and high heating bills are usually a wall insulation problem - we fix it fast, with minimal disruption to your home.
Wall insulation in Portsmouth, NH slows heat from escaping through your exterior walls, most jobs on a typical single-family home are completed in one to two days with no need to leave your home.
Cold walls are one of the most common complaints from Portsmouth homeowners, especially in homes built before the 1980s when wall insulation was not standard practice. If you feel a chill near exterior walls or notice certain rooms never warm up, the wall cavities may be empty. Proper wall insulation fills those cavities and makes a noticeable difference starting with the first cold snap. Many homeowners combine this work with air sealing services to get the most out of every improvement.
Portsmouth's older housing stock - including colonial, cape, and Victorian-era homes - often has shallow or irregular wall cavities that require an experienced contractor. We know how to work on these homes without damaging historic finishes or plaster walls.
If your energy costs spike sharply from October through March and your furnace seems to run constantly, your walls may be letting heat escape faster than your system can replace it. Portsmouth winters are long and cold, and a home with little or no wall insulation can lose a surprising amount of heat through exterior walls alone.
Hold your hand flat against an exterior wall on a cold day. If it feels noticeably cold, or if you sense air movement near outlets and switch plates on outside walls, your wall cavities likely have little insulation. In older Portsmouth homes - especially those built before World War II - this is extremely common because insulation was not part of standard construction.
If a room never warms up no matter how high you set the thermostat, the problem is often in the walls rather than the heating system. Corner rooms and rooms on the north or west side of the house - which take the brunt of Portsmouth's prevailing winter winds - are especially prone to this when wall cavities are empty or only partially filled.
Homes built before the mid-1980s in New Hampshire were constructed under older building codes that did not require meaningful wall insulation. If you have never had insulation work done and your home dates to that era or earlier, there is a good chance your exterior walls have little or nothing in them - particularly true in Portsmouth's historic neighborhoods.
We offer two main approaches to wall insulation depending on your home's condition. For finished walls - the situation in most Portsmouth homes - we use a blown-in method that requires only small access holes, fills every cavity completely, and leaves your walls looking as they did before. For walls that are open during a renovation, we install batt insulation between studs for a clean, thorough result. Pairing wall insulation with spray foam insulation in areas like rim joists or hard-to-reach corners gets you the most complete coverage.
Every job starts with an assessment of your walls before any holes are drilled. We check for moisture issues, confirm wall construction, and give you a written estimate with no surprises. We also know the NHSaves rebate program well and can help you use it to reduce your cost. For homes that need broader improvements, we often recommend combining wall work with air sealing services to close every pathway where heat escapes.
Best for finished walls - small access holes, complete cavity fill, and a patched finish when done.
A tightly packed blown-in method that prevents settling and ensures consistent coverage across every stud bay.
Ideal during renovation when walls are already open - pre-cut sections fit between studs for fast, thorough coverage.
Used for irregular cavities, penetrations, and hard-to-reach spots where blown-in material alone may not fully fill.
Portsmouth is one of the oldest cities in the country, and a large share of its homes were built long before modern insulation standards existed. Many houses in the South End, Strawbery Banke neighborhood, and surrounding streets have wall cavities that have never been filled. Combined with Portsmouth's cold winters - temperatures that regularly drop below freezing and wind off the Piscataqua River that makes a poorly insulated wall feel even colder - this means many homeowners are losing significant heat every season without realizing why. The state energy code now calls for insulation levels that most of these older homes do not come close to meeting. Homeowners in Exeter, NH and Hampton, NH face similar situations in their older housing stock.
Portsmouth's coastal location adds another layer of complexity. Salt air and higher ambient humidity off the harbor mean moisture management in wall assemblies matters more here than in inland communities. A contractor who understands how moisture moves through walls in a coastal climate will insulate your home in a way that keeps cavities drier over the long term - not just warm. The NHSaves rebate program, funded by utilities including Eversource, is available to Portsmouth homeowners and can meaningfully reduce the cost of qualifying wall insulation work. Learn more at NHSaves.com.
Reach out by phone or form and we will reply within one business day. We ask a few questions about your home's age and size so we arrive prepared.
We walk through your exterior walls, check for moisture, and assess how your walls are framed. You receive a written estimate before any work is scheduled - no surprises.
The crew drills small access holes, fills each cavity completely, and patches every hole when done. Most homes are finished in a single day. You stay home throughout.
We walk through the completed work with you, confirm coverage, and provide documentation needed for any NHSaves rebate application before leaving your driveway.
Free estimate, no obligation. We reply within one business day and can usually schedule your assessment within the week.
(603) 956-1359Portsmouth's historic neighborhoods have wall construction that newer contractors rarely encounter - irregular cavities, plaster walls, and non-standard stud spacing. We have worked on these homes extensively and know how to insulate them completely without damaging historic finishes.
The biggest fear with wall insulation is paying for work you cannot see. We verify complete cavity fill before patching each access hole, so you have confirmation the job was done right - not just a hope that it was.
We work with the NHSaves rebate program regularly and handle the documentation for you. Portsmouth homeowners who qualify can recover a meaningful portion of their project cost, and we make sure you do not leave that money on the table. Learn more about the program at BPI.org
Portsmouth's coastal humidity means moisture is always a factor in wall assemblies. Before we drill a single hole, we check for signs of existing moisture or leaks. If there is a problem, we flag it - because insulating over a moisture issue makes it worse, and we would rather tell you upfront than leave you with hidden damage.
When you combine local knowledge of Portsmouth's older housing stock with a commitment to verifying every job before we leave, you get wall insulation that actually performs. That is what we deliver on every project, from the South End to the city's outer neighborhoods.
Close the hidden gaps and cracks that let heated air escape, so your newly insulated walls can do their job even better.
Learn MoreExpanding foam that seals and insulates at the same time, ideal for irregular cavities and rim joists in Portsmouth's older homes.
Learn MorePortsmouth winters arrive fast - get a free estimate now and have warm, draft-free walls in place before the first hard freeze.