Get matched with top insulation pros in Kapolei, HI

Q: Should plaster walls be insulated?

• <div><p>Whether plaster walls should be insulated depends on whether the walls are at particular risk of moisture problems. In many cases, you can insulate plaster walls, while in others, it's a poor decision because of the lack of a vapor barrier. Choose a reputable insulation contractor to help you decide if and how to proceed to increase your home's energy efficiency.</p></div>

Q: What is inside a cupola?

• <div><p>You won&rsquo;t find anything inside a cupola on a house because it&rsquo;s hollow (think of an upside-down cup), allowing air to ventilate out of a roof via vents and light to come in via windows. They also usually have a base, vents around the middle (usually louvers), and a pointed cap at the top. </p></div>

Q: How can I cover my HVAC ducts and air vents during construction?

• <div><p>To cover your HVAC ducts and air vents during construction, use plastic sheets or drop cloths secured with painter's tape. Be sure to cover all supply vents on your floors and walls, as well as the larger HVAC return vent, which is typically on the ceiling. While canvas drop cloths can also be used, they may not catch all the fine dust. It is crucial to shut off your HVAC system or at least the zone where construction is happening. Running the system with vents sealed can put significant strain on the blower motor and air handler. For additional dust containment, you can also hang plastic sheets over doorways to separate the construction area from the rest of your home.</p></div>

Q: What's the difference between a vapor barrier and insulation?

• <div><p>A vapor barrier keeps moisture out of the crawl space, while insulation reduces the amount of unconditioned air&mdash;and sometimes moisture&mdash;that enters the space. Coupling a vapor barrier with insulation can help prevent humidity and related moisture damage in a crawl space while also making your home more energy-efficient. Just be sure to use insulation that won&rsquo;t get damaged from moisture, like rigid foam board or expanding spray foam insulation.</p></div>

Q: Does open-cell foam need a vapor barrier?

• <div><p>Because of the moisture concern, open-cell foam requires a vapor barrier. The barrier protects against high humidity and moisture exposure in rooms such as basements, bathrooms, or exterior walls. It wouldn't be necessary in dry interior spaces.</p></div>

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Verified Reviews for Insulation Service pros in Kapolei, HI

*The Angi rating for Insulation Service companies in Kapolei, HI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

*The HomeAdvisor rating for Insulation Service companies in Kapolei, HI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

Last update on September 02, 2026

Reviewed in September 2026
They installed central air a couple of years ago. A few months in, the attic unit started leaking through the ceiling, lights, and ceiling fans. They came out, claimed it wasn&#39;t their fault, and we spent a couple thousand dollars for the fix. I said I was done with them, but Damon seemed...
Hawaiian Pro A/C
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Reviewed in December 2025
The job was done in 3 days & looks good. I just hope the moisture buildup doesn’t occur again in another part of my.townhouse.
Reeves Remodeling and Restore
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Reviewed in September 2025
Awesome job! Work was done to repair a leaking hot water line. Hot water heater was drained and moved, concrete chipped to access the piping. Once piping was replaced with new copper water line drywall was repaired good as new. Brison works efficiently, he?s courteous, and leaves the area...
Brison's Plumbing, Inc.
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Reviewed in July 2025
Shout out to Kevin from Air Masters. After a preliminary estimate back in April, he returned to repair my Mitsubishi AC unit. He wasted no time in laying down plastic sheeting to protect the floor and wall. He immediately began breaking the down the unit and replacing the evaporator coil. He...
Air Masters Inc
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Reviewed in October 2024
Not only did Josh come to my site for an estimate he advocated towards a HOA who was not wanting me to put in an EV personal Charger. The companyâ s owner reached out to me and was helpful explaining their licensing and insurance documentations. After explaining the condo garage not being...
Paumalu Electric, Inc.
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Reviewed in October 2023
Ryan and his crew are total professionals. Skilled in every aspect of what was needed to complete a full renovation of our home. From the beginning to the end, Ryan was great at listening to my vision and any concerns along the way and responded in a timely and efficient fashion. He stayed...
JRP Construction
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Reviewed in August 2022
Darrell Ing of Hawaiian Energy Systems Inc was super helpful. He did not try to sell me something I didn't need and installed a standard water heater based on the size of our household. Work was done in a timely manner and Darrell and his crew were professional and efficient. I plan to use them...
Hawaiian Energy Systems, Inc.
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Reviewed in May 2022
Lawrence did an excellent job on our air conditioning unit. He installed our split a/c and got it working in a few hours. He also helped my daughter's a/c problem at her house and had it fixed in less than an hour. I trust Lawrence because his work is excellent!! I will always recommend his...
Hi Tech Air Conditioning LLC
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Reviewed in September 2021
GUY REPAIRED TWO ROOF LEAKS FOR US. HE SHOWED UP THE NEXT DAY. HE WAS METICULOUS WITH PROTECTING OUR FURNISHINGS FROM DUST AND DAMAGE. HE DID AN EXCELLENT JOB AND WE HIGHLY RECCOMEND HIM!
McKeague Drywall
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Reviewed in March 2021
Robert and his team showed up on time and completed all the work in a truly professional manner. The prices he charged were very reasonable. I would gladly use his services again for any future drywall or insullation projects in our home.
RA Acoustic, Insulation and Drywall
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Find Insulation pros in Kapolei

H Drywall, LLC

5.0(

)

Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Kapolei, HI and surrounding areas

In business since 1993

Free estimates

Emergency services offered

"The work was clean and the owner as well as, all of the employees were professional and friendly. The only criticism would be the failure to clean up the job site. They did haul most of the rubbish away but the employees left chunks of drywall mud and screws on the floor of the garage, empty bottles in the yard, and leftover materials, fiberglass insulation, were thrown carelessly on top of my personal belongings. Despite the messiness, I would hire this company again. ?"

Recommended by98%of homeowners

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American Home Shield – Home Warranty

3.5(

5,688

)

Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Kapolei, HI and surrounding areas

In business since 1971

Credit card accepted

"Roberto was the technician and he was very professional, polite, and personable. He inspected the rest of our system and told us things that needed to be changed or repaired. He showed me pictures of everything. Everything he told me about was accurate. He quoted me a price for R38 insulation , Some of our ducts were plastic and he recommended them to be changed. I agreed completely and didn't know they were plastic. I would have had them done the work but I had no price comparisons to make and besides I didn't have the money right then. So he just finished the vent cleaning and left his card. He did a great job on the vent cleaning and was happy with the work."

Recommended by65%of homeowners

Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Kapolei, HI and surrounding areas

Credit card accepted

Aloha we are a small business raised in Oahu. We thrive off the passion of delivering a clean & cozy home. We specialize in cleaning everything from bathrooms to kitchens to floors & carpet. We leave you feeling fresh and happy with the results of a sanitized work or living space. We bring our own chemical solutions, rags, vacuums, mops, brooms and other tools needed to clean your home efficiently and swiftly. We hope you give us a chance to show you what we are capable of. Thank you for your trust in our growing business. Mahalo

Recommended by100%of homeowners

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Statewide General Contracting & Construction, Inc.

4.0(

)

Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Kapolei, HI and surrounding areas

In business since 2004

Free estimates

Credit card accepted

At Statewide General Contracting & Construction, Inc., we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Feel free to book online with us today!

Response time1 day

Recommended by100%of homeowners

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Insulation questions, answered by experts

Whether plaster walls should be insulated depends on whether the walls are at particular risk of moisture problems. In many cases, you can insulate plaster walls, while in others, it's a poor decision because of the lack of a vapor barrier. Choose a reputable insulation contractor to help you decide if and how to proceed to increase your home's energy efficiency.

You won’t find anything inside a cupola on a house because it’s hollow (think of an upside-down cup), allowing air to ventilate out of a roof via vents and light to come in via windows. They also usually have a base, vents around the middle (usually louvers), and a pointed cap at the top.

To cover your HVAC ducts and air vents during construction, use plastic sheets or drop cloths secured with painter's tape. Be sure to cover all supply vents on your floors and walls, as well as the larger HVAC return vent, which is typically on the ceiling. While canvas drop cloths can also be used, they may not catch all the fine dust. It is crucial to shut off your HVAC system or at least the zone where construction is happening. Running the system with vents sealed can put significant strain on the blower motor and air handler. For additional dust containment, you can also hang plastic sheets over doorways to separate the construction area from the rest of your home.

A vapor barrier keeps moisture out of the crawl space, while insulation reduces the amount of unconditioned air—and sometimes moisture—that enters the space. Coupling a vapor barrier with insulation can help prevent humidity and related moisture damage in a crawl space while also making your home more energy-efficient. Just be sure to use insulation that won’t get damaged from moisture, like rigid foam board or expanding spray foam insulation.

Because of the moisture concern, open-cell foam requires a vapor barrier. The barrier protects against high humidity and moisture exposure in rooms such as basements, bathrooms, or exterior walls. It wouldn't be necessary in dry interior spaces.

The Kapolei, HI homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Deane Biermeier
•
Jul 8, 2026Jul 8, 2026
How Much Does Ceiling Insulation Cost? [2026 Data]
Your home's ceiling insulation cost will depend on several factors, including the project size, the type of insulation you use, and the R-value.
Mitchell Grant
•
Jul 9, 2026Jul 9, 2026
How Much Does Crawl Space Insulation Cost? [2026 Data]
Crawl space insulation costs vary by size, insulation type, and material. Read this guide to learn how much your crawl space insulation could cost.
Dan Simms
•
Mar 6, 2026Mar 6, 2026
How Much Does Pipe Insulation Cost? [2026 Data]
Find out the average pipe insulation cost, including material and labor prices, plus tips to save money on your project.
Scott Dylan Westerlund
•
Jul 9, 2026Jul 9, 2026
What Is Dryer Vent Insulation? Should You Insulate It?
Learn how to decide if your home needs dryer vent insulation to protect your vent from drafts and moisture that can make your energy usage less efficient. Poorly ventilated dryer vents also increase mold risks!
Allie Ogletree
•
Jul 31, 2026Jul 31, 2026
Should You Remove Old Insulation Before Adding New Insulation?
Removing old insulation may be necessary for upgrading your insulation. Keep reading to see if you should remove old insulation before adding new insulation.
Deane Biermeier
•
May 2, 2026May 2, 2026
How to Insulate Plaster Walls in a Home
Learning how to insulate plaster walls can help improve your home's energy efficiency. However, there are crucial cautions to consider before attempting.