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Serving Honolulu, HI and surrounding areas. (808) 509-0068
Custom Honolulu Insulation helps homeowners across Oahu stop paying to cool the sky. We insulate attics, walls, crawl spaces, and more - with real solutions built for Hawaii's climate, not the mainland.
Custom Honolulu Insulation is a licensed insulation contractor serving Honolulu, HI and the surrounding communities across Oahu. We offer 16 insulation and air sealing services for residential and commercial properties, covering every area of your home from attic to crawl space. Whether you're dealing with runaway electric bills, hot upstairs rooms, or moisture problems, our team diagnoses the root cause and fixes it - not just the symptom.
Your AC fighting all day but losing? Spray foam seals every gap and stops Honolulu heat at the source.
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Top floor feeling like an oven? Proper attic insulation blocks radiant heat before it reaches your living space.
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Blown-in insulation fills every corner of your attic, cuts AC runtime, and installs in a single day.
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A whole-home insulation assessment finds where your cooling energy is escaping and fixes it for good.
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Old, wet, or pest-damaged insulation? We remove it safely and prepare your attic for a fresh start.
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Crawl spaces let heat and moisture into your home from below - we seal and insulate them properly.
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Hot walls heating up your rooms? Wall insulation cuts heat gain and makes every room more comfortable.
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Gaps around pipes, wires, and fixtures let humid outside air in constantly - air sealing closes them all.
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Below-grade spaces need the right insulation to control moisture and temperature in Honolulu's climate.
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Closed-cell foam is dense, moisture-resistant, and ideal for crawl spaces and high-humidity areas.
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Open-cell foam covers large spaces quickly and adds acoustic benefits alongside its thermal performance.
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Commercial buildings in Honolulu lose significant energy through poor insulation - we fix that at scale.
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A vapor barrier stops ground moisture from rising into your home's structure and degrading your insulation.
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Proper vapor barrier installation protects insulation, framing, and air quality in humid island conditions.
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Sealing attic bypasses stops conditioned air from escaping above and blocks humid outdoor air from entering.
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Older Honolulu homes were built without modern insulation standards - retrofit upgrades fix that without renovation.
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Reach out by phone or through our contact form. We ask a few quick questions about your home - age, area you want insulated, and what problems you've noticed. We respond within 1 business day and schedule your free in-home estimate at a time that works for you.
A licensed contractor visits your home, inspects the attic, crawl space, or walls, and measures what is already there. You get a written estimate with a clear breakdown of what will be done, what materials will be used, and what the total cost will be - no surprises.
Our crew arrives on the scheduled day and completes the work efficiently. Most jobs finish in a single day. Before we leave, we walk you through exactly what was installed and where, show you the results, and answer any questions. Your home is ready to use immediately.
We hold a valid Hawaii state contractor license and carry full liability insurance on every project. Your home is protected, and you have real recourse if anything ever goes wrong.
We come to your home, assess the actual work needed, and give you a written estimate - no pressure to decide on the spot. The estimate is yours to keep and compare.
We've been serving Oahu homeowners since 2016. We know Hawaii's climate, housing stock, and permit requirements - we do not need to learn on your dime.
If the work does not meet the standard we agreed on, we come back and fix it. We stand behind every job, and we do not consider a project closed until you are satisfied.
Ready to get started? Call (808) 509-0068 or request a free estimate online.
"Our upstairs bedroom was basically unusable in the afternoon - now it feels like the rest of the house. The attic job was done in one day and the crew cleaned up completely before leaving."
Marcus T., Kaimuki - Attic insulation
"Our electric bills dropped noticeably after the spray foam job. The team explained what they were doing and why, which we appreciated. They handled the permit paperwork without us having to do anything."
Linda S., Pearl City - Spray foam insulation
"We had an older home in Manoa that had never been insulated properly. The blown-in job was less disruptive than we expected - done by noon and we were back to normal by afternoon."
Ray K., Manoa - Blown-in insulation
We respond within 1 business day - no waiting around. There is no obligation, and no pressure to commit on the spot. After you submit, someone from our office will call to schedule a free on-site estimate at a time that works for you.
(808) 509-0068Custom Honolulu Insulation serves Honolulu and surrounding communities across Oahu, including Pearl City, Kailua, Kaneohe, and more - 12 service areas in total. We offer same-week scheduling for most projects and can usually have an estimator to your home within a few days of your first call.
In Honolulu, the sun heats your roof all day - and without enough attic insulation, that heat radiates straight down into your rooms. Adding insulation to the attic floor or roof deck is almost always the fix for this specific problem.
It pays off faster here than anywhere else in the country. Hawaii's electricity rates are roughly three times the national average, so every improvement in your home's efficiency translates into larger monthly savings than the same upgrade would deliver on the mainland.
Yes - if the wrong materials are used or if air gaps are not sealed first. Moisture follows air movement, so an attic full of gaps lets humid outside air in constantly. The right combination of air sealing and moisture-appropriate insulation prevents this.
Especially so. Homes built before the 1980s in Honolulu were often designed with little or no insulation because the climate seemed forgiving. That changed as electricity rates climbed. Older homes in Kaimuki, Manoa, and Palolo benefit the most from modern insulation upgrades.
Closed-cell foam is dense and moisture-resistant - best for crawl spaces and below-grade areas. Open-cell foam is softer and covers large spaces quickly. A licensed contractor will recommend the right type based on where it is going and the conditions in your home.
Insulation slows heat movement; air sealing stops conditioned air from escaping through gaps around pipes, wires, and fixtures. In Honolulu's humid climate, those same gaps also let moist outdoor air in. The U.S. Department of Energy recommends both steps together for maximum results - see{" "} energy.gov for guidance. The U.S. Department of Energy recommends both steps together for maximum results. Learn more at energy.gov.
Custom Honolulu Insulation is a licensed and insured insulation contractor based in Honolulu, HI, serving homeowners and businesses across 12 communities on Oahu since 2016.
Our contractors hold a valid Hawaii state contractor license issued by the Department of Commerce and Consumer Affairs, which you can verify on the DCCA website before you hire us.
Since 2016, we have completed insulation projects across all 16 of our service categories - from single-day attic jobs in Kaimuki to commercial spray foam work in Kakaako. We know what Hawaii homes need, and we are not guessing based on mainland experience. Learn more about us.
If your existing insulation is wet, compressed, or damaged by pests, adding new material on top traps moisture and creates bigger problems. A contractor should inspect the condition of what is already there before recommending a course of action.
Air sealing closes the gaps that let warm, moist air in - and those gaps need to be sealed before the insulation goes on top of them. Doing it in reverse order means you're insulating over pathways that still allow outside air movement.
Keep your written estimate, the final invoice, any product spec sheets, and photos of the finished work. This paperwork matters if you apply for a Hawaii Energy rebate, sell your home, or ever need warranty service.
Hawaii Energy publishes resources on qualifying insulation upgrades and available rebates at hawaiienergy.com. Ready to take the next step? Call us at (808) 509-0068 or request a free estimate.
Honolulu is home to roughly 350,000 residents within the city proper, spread across a mix of older single-family neighborhoods and high-rise condominiums. Census data shows that much of the city's housing stock was built between the 1950s and 1980s - a post-statehood building boom that produced homes designed for natural ventilation rather than air conditioning. Those homes are now 50 to 70 years old, and most were never updated to reflect modern insulation standards.
The neighborhoods we work in most frequently include Kaimuki, with its craftsman-style bungalows and older residential character; Manoa, where lush valley conditions bring higher humidity and over 150 inches of rainfall per year; and Honolulu's broader neighborhoods from Diamond Head west to Pearl Harbor. Homes near the coast face additional wear from salt air, which accelerates deterioration of building materials and makes tight sealing especially important. The iconic Diamond Head State Monument sits at the eastern edge of the city - and the homes in its shadow deal with some of the same intense sun exposure that drives heat into poorly insulated attics across the island.
Custom Honolulu Insulation has been working in Honolulu and surrounding Oahu communities since 2016. We know the difference between a 1960s concrete block home in Kaimuki and a newer condo unit near Waikiki, and we bring the right approach to each. If your home is in Honolulu and you want to stop overpaying on electricity, we are ready to help.
By appointment only, no walk-ins.
Custom Honolulu Insulation
229 Madeira St
Honolulu, HI 96813
estimates@honoluluinsulation.com
Always open, 24/7.
Custom Honolulu Insulation offers free on-site estimates with no obligation - call or submit online and we will respond within 1 business day.