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Find Insulation pros in Leesburg

Avatar for DMV Insulation
DMV Insulation
5.0(
6
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"DMV Insulations is a great company to work with. The company focuses on your personal needs, always on time, and great customer service! Mark was able to answer any questions I had, and provided me with useful information. I would recommend this company to anyone with attic insulation needs."
Fiberglass Blow-in
Sanctuary insulation install.
Save energy, reduce waste, and lower your carbon footprint.
Loose fill insulation install.
Additional Photos

+5

Response time1 day
Response rate100%
8 neighbors recently requested a quote
Avatar for Comfenergy, LLC
Comfenergy, LLC
4.6(
54
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"I've been trying to find an expert in insulation for months to come out and tell me out to properly insulate around a removed chimney and Comfenergy was the expert I needed. Even though the insulation part of the job was too small for Comfenergy (wasn't above their minimum quote value) they were happy to give me their expert advice and I appreciate the time spent as I now know what to ask the roofing contractor to do in order to insulate this correctly. Thanks!"
Additional Photos
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Additional Photos

+68

Response time1 day
20 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Discount Energy Services
Discount Energy Services
4.3(
89
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 1984

Free estimates

Warranties offered

"It was amazing, took all day to get the old insulation out, seal the holes, and refill with new insulation. Would recommend this company to anyone looking for a professional service to improve insulation and save money on heating and cooling costs."
Additional Photos
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+2

Response time1 day
19 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for HomeGuard Foam & Foundation
HomeGuard Foam & Foundation
4.7(
23
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"I had several options to pursue in finding a remedy for my hot attic. After meeting with the insulation consultant who was extremely knowledgeable, patient, and provided detailed explanations of how to insulate I knew proceeding with the job was the right decision. My attic is noticeably cooler and I highly recommend"
Attic - Open Cell Spray Foam
Closed Cell Spray Foam
Open Cell on Exterior Walls
Open Cell Spray Foam
Open Cell Spray Foam

+76

Response time1 day
Response rate86%
16 neighbors recently requested a quote
Avatar for Founders Insulation
Founders Insulation
4.9(
17
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"Founders Insulation did a very good job on installing insulation in ceilings! They were careful, courteous and cleaned up."
Exterior Walls
Exterior Walls
Roof line
Exterior Walls
Exterior Walls

+11

Response time12 hrs
312 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for The Fifth Fuel of Virginia, LLC
The Fifth Fuel of Virginia, LLC
4.6(
58
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"I had multiple estimates and Fifth Fuel was the most professional and reasonable. Josh came to my house, took pictures of my attic and explained the different choices of insulating the attic. He provided an estimate in writing the same evening. The installers arrived on time, sent me photos of the before and after. They left the house clean with no debris. The result is a huge improvement in the temperature between the upstairs and down. I couldn’t be happier with them! Outstanding!! Thank you!"
Response time1 day
58 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Comfenergy
Comfenergy
3.9(
50
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"I am so impressed with Comfenergy. The sales rep explained why we only needed to improve the insulation at the top of our unfinished basement walls, not the whole thing as another company recommended. So it was considerably less money than we thought we’d need to do the job. Brent and his assistant arrived on time to do the work and were so quiet that we weren’t inconvenienced in any way. I definitely recommend this company."
Attic before
Attic after
Historic Waterford Home
Historic Plaque
Crawl space before

+6

Response time1 day
104 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for ROI Construction LLC
ROI Construction LLC
4.3(
17
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"We had a great experience with ROI Construction sales representative David Burke. David was very knowledgeable about ROI's porducts and services. We look forward to getting our attic insulation project completed and will provide a more thorough review at that time. Thanks, Tim"
Additional Photos
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Additional Photos

+19

43 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for 3 PROS Basement System
3 PROS Basement System
3.9(
38
)

Serving Leesburg, VA and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"Excellent service and professional work. The only problem was a broken sprayer for which there was no spare that delayed completion. The company refunded our extra hotel night and the owner John LeVan came out personally to ensure clean-up was done correctly and that their work met our expectations. This was also the only company of four that gave an appraisal that provided health and safety information on the product and how ventilation should be performed!!!"
Crawl Space Before Picture
Finished!
Beautiful Encapsulated Crawl space
SaniDry Sedona
Spray Foamed walls

+32

Response time1 day
75 neighbors recently requested a quote
Recommended by90%of homeowners
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FAQs for insulation service projects in Leesburg, VA

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.

The Leesburg, VA homeowners’ guide to insulation services

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

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