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Spray Foam Insulation in Washington, DC

Find top-rated spray foam contractors and save up to 25% on energy bills

Compare 3 verified spray foam insulation contractors serving Washington, District of Columbia, backed by 112 customer reviews averaging 4.5★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened Washington contractors handle both open-cell and closed-cell spray foam. Homeowners here typically cut energy bills by around 25% — get free quotes and read verified reviews below.

💰 Spray Foam Savings Calculator for Washington

Homes in Washington typically cut energy use by 20%–30% with spray foam. Change the numbers below to fit your home.

Foam type
$450
Estimated annual savings
At about 25% off your energy bill
$5,100–$8,200
Rough install cost
Attic roofline, about 5.5" of open cell
11–18 years
Estimated payback
Install cost ÷ annual savings

These are estimates, not quotes. Actual savings vary based on home size, current insulation, energy rates, and climate conditions. Savings estimates are based on Department of Energy data for your climate zone. Cost assumes the attic roofline (about 1.15× your home's square footage) at typical installed prices of $0.40–$0.65 per board foot for open cell and $1.00–$1.50 for closed cell; a two-story home has less roof and usually costs less. Get quotes from the contractors below for real prices.

Verified Contractors in Washington

Crawl Space Brothers

📞 Call Now🌐 Visit Website

Direct: (571) 582-3591

4.8⭐
89 Google reviews

Recent Reviews:

Christine Stavrou★★★★★4 months ago

Highly recommend Crawl Space Brothers! In one day, they transformed our crawl space from a junk filled, mildewy mess that we never could use into a clean, protected space where we can store things. Everyone we worked with was professional and friendly.

Candace Poe★★★★★a month ago

Friendly and considerate staff. Completed my project and cleaned everything up. Oliver was exceptional, seeing the project through from scheduling to completing the work. The pricing was very reasonable. I had gotten quotes from 8 other companies prior to contacting CSB. They were respectful of my needs and budget, willing to do the most critical aspect now and allow me to reach out in the future when I am ready to take on the rest. I will be utilizing their services again and highly recommend them.

Jeanean Willis Marsh★★★★★a month ago

Oliver and his crew did an amazing job! My house was built in 1970 and had over 50 years of cobwebs, lint, and dirt in the crawl space. The team thoroughly cleaned the space and did an excellent job of encapsulating the floor and walls. My humidifier works great and I love the small, portable monitor that I placed on my kitchen counter. Oliver taught me how to read the monitor and gave me his number to call should the humidity levels move out of range. I noticed immediately after installation that there is less dust and spiders, and more importantly, no critters in my house. One last thing, they did a great job of cleaning up after the job was done . I highly recommend them!

DC Spray Foam Insulation

⭐Specialist
📞 Call Now🌐 Visit Website

Direct: (202) 915-3464

4.7⭐
15 Google reviews

DMV ATTIC INSULATION

📞 Call Now🌐 Visit Website

Direct: (202) 516-6980

4.1⭐
8 Google reviews

Recent Reviews:

Ehud M★★★★★3 years ago

I purchase my home in NW Chevy Chase DC few months ago and the insulation was very old and non-sufficient , Leo & his team from DMV attic insulation did amazing job, the remove the old insulation & clean the attic, then the did air sealing all over the attic floor to seal all gaps and holes, after that the install new fiberglass insulation R-49 ( we can feel a huge different already ) , the also built a storage platform in the attic for storage & install new attic fan to reduce the heat in the summer, outstanding job , complete it the next day. Thank you Leo for making our home cooler in the DC summer☀️🌞 and warmer in the cold DC winter ❄️🥶

Israel Sayag★★★★★2 years ago

The best decision we ever made was having our upstairs properly insulated. We hired DMV ATTIC INSULATION and they did a FANTASTIC job. They were thorough and professional. They came on time and even cleaned up after themselves. We have already begun to see out heating expenses go down. Our only regret was waiting so long to get it done!

Shiran Amrani★★★★★2 years ago

Leo and his team did an amazing job. They start by removing all the old insulation then they did air sealed and disinfected and finally they install new insulation all over the attic. The result is amazing, & the house feel much comfortable. I can already feel the difference. Thank you.

Frequently Asked Questions — Spray Foam Insulation in Washington

These are the questions Washington homeowners ask most about spray foam cost, R-value, and open- vs. closed-cell foam — with context for local pricing and roughly 25% typical energy savings. Compare the 3 verified Washington contractors above for exact quotes.

Is spray foam insulation worth the cost?▼
For most homeowners, yes. Spray foam creates an air-tight seal that traditional insulation cannot match, reducing energy bills by 15–35% annually. It also adds structural rigidity, acts as a moisture and vapor barrier, reduces outside noise, and can increase home resale value. The higher upfront cost compared to fiberglass is typically recovered within 3–7 years. One important note: because spray foam creates a very tight building envelope, proper mechanical ventilation is important to maintain healthy indoor air quality and prevent interior moisture buildup. This is typically handled by an Energy Recovery Ventilator (ERV) — a system that brings fresh outside air in while pushing stale air out, recovering the energy from the outgoing air so you don't waste what you paid to heat or cool — or a Heat Recovery Ventilator (HRV), which works similarly but is optimized for cold climates. A qualified contractor will assess whether your home needs ventilation upgrades as part of the installation.
How much does spray foam insulation cost in Washington, DC?▼
In Washington, DC and the surrounding area, spray foam insulation typically costs $1.00–$3.00 per square foot installed, depending on the type and your home's specifics. Open-cell foam runs $0.44–$0.65 per board foot, while closed-cell foam costs $1.00–$2.00 per board foot. A typical 2,000 sq ft home attic in Washington costs $2,000–$6,000. Most Washington homeowners recoup this investment within 3–7 years through energy savings of 15–35% annually.
What is the difference between open-cell and closed-cell spray foam?▼
Open-cell spray foam is softer, less dense, and less expensive. It expands significantly and is ideal for interior walls, attics, and soundproofing. Closed-cell spray foam is denser, stronger, and provides a moisture barrier — making it better for exterior applications, crawl spaces, and areas prone to flooding or humidity. Closed-cell also has a higher R-value per inch (R-6 to R-7 vs R-3.5 to R-4 for open-cell). One key difference: open-cell foam allows some vapor movement, while closed-cell acts as a vapor barrier — an important consideration for your home's ventilation needs.
How long does spray foam insulation last?▼
Spray foam insulation is one of the most durable insulation options available, with a lifespan of 80+ years when properly installed. Unlike fiberglass batting which can sag and settle over time, spray foam maintains its shape and insulating properties indefinitely. It will typically outlast the building it is installed in.
How do I find a qualified spray foam insulation contractor in Washington, DC?▼
When searching for a spray foam contractor in Washington, DC, look for ones who are licensed, insured, and have verifiable reviews. Spray foam requires specialized equipment and training — improper installation can cause off-gassing, adhesion failure, or fire hazards. Ask for references, verify their insurance, and get at least 2–3 quotes. A qualified Washington contractor will also assess your home's ventilation needs — a tightly sealed spray foam installation requires adequate mechanical ventilation to prevent moisture and indoor air quality issues. FoamMatch pre-screens all listed contractors in Washington for licensing and insurance so you can compare verified professionals in your area.
How long does spray foam installation take?▼
Most residential spray foam jobs take 1–2 days depending on the size of the area. A standard attic takes 4–8 hours. After spraying, the foam cures within 24 hours, though most contractors recommend waiting 24–72 hours before occupying the space due to off-gassing during the curing process.
Does spray foam insulation need to be replaced?▼
No — spray foam insulation does not need to be replaced under normal circumstances. Unlike fiberglass insulation which degrades over time, spray foam maintains its R-value and air sealing properties for the life of the building. The only reasons to remove or replace spray foam are water damage, renovation work, or improper original installation.

Spray Foam Contractors Near Washington, DC

Not finding the right fit in Washington? Many spray foam contractors travel to nearby towns. These communities within about 60 miles all have verified contractors listed.

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