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Avatar for Prudent Homes
Prudent Homes
4.7(
236
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Merrifield, VA and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"David and his team were very professional and the work they did was excellent---we could tell the difference the next day. The temperature on the 2nd floor is several degree lower than before due to the new insulation and feels much more comfortable. David has solid knowledge regarding insulation and he explains things clearly. Definitely would recommend David and Prudent Homes to my friends and neighbors."
38 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for USA Insulation of Fairfax County
USA Insulation of Fairfax County
5.0(
6
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Merrifield, VA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

USA Insulation of Fairfax County provides energy-efficient insulation solutions designed to make homes more comfortable and cost-effective year-round. As part of the trusted USA Insulation network, we specialize in premium injection foam insulation, attic insulation, air sealing, band joist and crawl space solutions. Our team helps homeowners reduce energy loss, lower utility bills, and improve indoor comfort with minimally invasive installation methods. We are committed to quality workmanship, honest recommendations, and outstanding customer service. From consultation to completion, USA Insulation of Fairfax County delivers reliable results that help protect your home and maximize energy savings.

Band Joist
Band Joist
Band Joist
Injection Foam
Injection Foam

+3

22 neighbors recently requested a quote
Avatar for Comfenergy, LLC
Comfenergy, LLC
4.6(
54
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Merrifield, VA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"Comfenergy was very professional thorough from the in-person estimate thru installation. Even though we didnt have a full energy audit, they still go over your entire home and tell you what should and what needs to be done. Some of the little things we did ourselves, or had our handyman. Then Comfenergy did the big part, seal and insulate the attic. We still had late 80's insulation and never a sealing done. It ended up being over an 8 hour project. They were not the cheapest estimate, but definitely the most in-depth review and recommendations provided. The two man team that did the actual work were very professional, showed us the work as the progressed, and good clean up job after all was done."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+68

Response time1 day
27 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Discount Energy Services
Discount Energy Services
4.3(
89
)
Blown-In Insulation - Install or UpgradeInsulation - Install or Upgrade

Serving Merrifield, VA and surrounding areas

Approved

In business since 1984

Free estimates

Warranties offered

"We had a great experience with Discount Energy Services. They insulated our entire attic and crawl space, and from start to finish they were professional, responsive, and easy to work with. The turnaround time was impressively quick, the quality of the work was excellent, and we felt the value was very good for the scope of the project. The team was efficient, knowledgeable, and clearly took pride in doing the job well. We really appreciated how smoothly the whole process went and would gladly recommend Discount Energy Services to anyone looking for high-quality insulation work."
Additional Photos
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+2

Response time1 day
19 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Northern Virginia Insulation and Exteriors, LLC
Northern Virginia Insulation and Exteriors, LLC
4.1(
159
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Merrifield, VA and surrounding areas

Approved

In business since 2014

Free estimates

Credit card accepted

"I am very pleased with how my attic insulation project turned out. when the company came to my house to give an estimate they evaluated my current insulation, told me what I needed to bring my home up to the current standards for attic insulation. (r49) more importantley they told me what I didn't need. I highly recommend this company for your insulation project."
Gallery
38 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for The Fifth Fuel of Virginia, LLC
The Fifth Fuel of Virginia, LLC
4.6(
58
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Merrifield, VA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"These guys were the benchmark for contracting work. Quick estimates on pricing that they stuck to. Timely quality work, and a great clean-up effort. 10/10 would recommend for insulation work."
Response time1 day
50 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Comfenergy
Comfenergy
3.9(
50
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Merrifield, VA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"Very easy to work with. Their repncame out and did a free home energy audit in a timely manner. They then go over over everything they find. He walked me through everything he found. The list he came up was priced out but was definitely a little more than I wanted to spend...but he worked with me to figure out what items to fix that would give me the most bang for my buck at the cost wanted to spend. We definitely notice an improvement in the house from the fixes. I would recommend these guys."
Attic before
Attic after
Historic Waterford Home
Historic Plaque
Crawl space before

+6

Response time1 day
108 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Capital Insulation, LLC
Capital Insulation, LLC
4.7(
70
)
Blown-In Insulation - Install or Upgrade

Serving Merrifield, VA and surrounding areas

In business since 2005

Free estimates

Small jobs welcome

"Capital Insulation just finished a two-day project at my home, removing old, poor quality attic insulation and replaced it with 21 inches of blown fiber glass insulation. They sealed joints, insulated and sealed around sky lights, recessed lights, put new covers over recessed ceiling lights, etc. Jon, team lead, is awesome, a true professional, and task focused to deliver superior results. The crew worked together well with a positive work attitude which I admired. You can see that they enjoy their work and take pride in what they do. Since most of us home owners don't get up into our attics much, if at all, it is important to find a company you know will do the work you pay for. This is a high-quality company with integrity that will do outstanding work for you and you will no longer need to worry about what is going on in your attic. Karl, the company owner, was also in the attic doing work at my home and pointing out to me things he found and offered solutions for fixing problems"
Insulation after.
Attic after removal.
Insulation before.
Before Encapsulation
After Encapsulation

+19

Response time2 days
Recommended by96%of homeowners
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Drywall Insulation questions, answered by experts

It doesn’t matter which way you lay drywall, and you can choose to install it horizontally or vertically depending on the size of the wall and how tall the ceiling is. It’s easier to lay drywall sheets vertically if you have a taller ceiling, but laying sheets horizontally makes it easier to apply joint compound.

You should wait at least 24 hours for drywall mud to dry before sanding or applying another coat. However, the exact drying time depends on several factors, including the thickness of the application, room temperature, humidity, and the type of compound used. Thicker layers, or projects in high humidity, may require 48 hours or more. Lightweight compounds tend to dry faster than heavier, all-purpose ones. You'll know the mud is ready when it feels completely dry and firm to the touch and has changed to a consistent light color. Sanding too early can cause smudging or gouges, so patience is essential for a smooth finish.

It’s not a good idea to plaster over broken plaster (unless by broken you’re referring to cracked, in which case that’s perfectly fine). However, broken plaster can be a sign of a larger underlying issue like foundation damage or severe damage to the lath holding up the plaster, so it’s worth investigating before you simply plaster on top of the damage.

You can put drywall mud over paint to even out the surface or entirely resurface it. Sand the surface with 280-grit sandpaper, vacuum the debris and dust with a shop vac, and clean it with a slightly damp cloth. Allow the surface to dry. Apply drywall primer, especially if you’re skim-coating an entire wall. Apply the right type of drywall mud over the surface and smooth it with a trowel. Allow the layer to cure fully, then sand it before applying another layer or painting it.

Drywall can be installed directly on ceiling joists. In fact, this method is common in many construction projects. Drywall sheets are attached to the joists using screws, ensuring a secure and stable installation. Before attaching the drywall, it's important to mark the joist locations on the ceiling, allowing for accurate screw placement. Proper spacing between screws and careful taping and mudding of joints are crucial to creating a smooth and flawless ceiling surface. If the joists are in good condition and level, installing drywall directly on them is a practical and efficient approach.

The Merrifield, VA homeowners’ guide to drywall insulation services

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