Every project
Free estimates
A free, no-obligation visit and a detailed written estimate before any work begins. No pressure to commit.
Serving Bangor, Hampden & Central Maine
Crawl Space Encapsulation in Bangor, ME
A sealed, dry, conditioned crawl space that stops musty air, mold and cold floors above.
- 5.0 · 27 Google reviews
- Licensed & insured
- BPI · IICRC · MICRO certified
- Efficiency Maine partner
- 20+ years experience
- 500+ projects completed
Offers & financing
Payment options
Financing available
Financing options help make larger projects affordable. Ask about current terms when you book your estimate.
What Is Crawlspace Encapsulation?
Crawlspace encapsulation is the process of sealing your crawlspace from the ground and outside air using heavy-duty vapor barriers, sealed vents, and climate control. This transforms your crawlspace from a damp, dirty area into a clean, dry, conditioned space.
Maine's climate creates ideal conditions for crawlspace moisture problems. Humid summers, spring snowmelt, and high water tables can all contribute to dampness,mold growth, and structural damage. Encapsulation works alongside waterproofing solutions to address these issues at the source.
Get a Free Assessment
Benefits of Encapsulation
A properly encapsulated crawlspace provides lasting benefits for your home and family. An energy audit can show you exactly how much you can save.
Moisture Control
Eliminate dampness and standing water that leads to mold, rot, and pest problems.
Improved Air Quality
Up to 50% of your home's air comes from below. A clean crawlspace means cleaner air.
Energy Savings
Proper encapsulation can reduce heating and cooling costs by up to 20%.
Structural Protection
Prevent wood rot and damage to floor joists and support beams.
Pest Prevention
Sealed crawlspaces are less attractive to insects, rodents, and other pests.
Increased Home Value
A properly encapsulated crawlspace is a selling point for potential buyers.
Our Encapsulation Process
We follow a comprehensive process to ensure lasting results.
1
Inspection
We assess your crawlspace condition, identify moisture sources, and check for existing damage.
2
Preparation
Remove debris, address any standing water, and treat existing mold if present.
3
Vapor Barrier
Install heavy-duty 20-mil vapor barrier on floor and walls, sealed at all seams.
4
Seal Vents & Openings
Close foundation vents and seal all openings to create a conditioned space.
5
Dehumidification
Install a commercial-grade dehumidifier to maintain optimal humidity levels.
6
Insulation (Optional)
Add spray foam insulation to walls for maximum energy efficiency.
Our Work
What does crawl space encapsulation cost in Maine?
$5,000–$15,000
Typical range
Typical for a full encapsulation in Central Maine: vapor barrier on floor and walls, sealed vents and a dehumidifier. Crawl space size, standing water or mold that must be handled first, and spray foam insulation on the walls move the price.
Every job starts with a free, no-obligation estimate. You get the exact price in writing before any work begins.
Why Central Maine homeowners choose Nason's
Long-term solutions, not quick fixes
We fix the cause, not just the symptom. Water, mold and heat loss get traced to the source so the problem stays solved.
Transparent, written estimates
A free on-site visit and a detailed written estimate with no pressure to commit. The price you see is the price you pay.
Certified, local crew
BPI, IICRC and MICRO certified professionals based in Hampden, with 20+ years of experience and 500+ completed projects across Central Maine.
What our customers say
5.0 rating · 27 Google reviews
Madelyn Boardman
October 2025 · Google
“I needed to insulate my cellar and I had Nick and his crew come and. I'll definitely recommend him to others when a job that needs to be done correctly and in a professional way give him a call and ask for his help and he'll get back to you in a timely way just as soon as he can.”
Traveling. Not Lost!
May 2024 · Google
“Nick was wonderful from start to finish. He showed up when he said he would, got the work done as promised, and went above and beyond. My horrible crypt-like 200 year old cellar is now sealed and dry, and looks like a completely different cellar. I recommend Nason's without reservation!”
Chelsey Schader
October 2020 · Google
“Otis & the rest of the team were kind, professional, and very thorough. This is our first winter in our house and we wanted to get our basement insulated to help save on heating costs.”
Crawl space encapsulation questions from Bangor-area homeowners
What is crawl space encapsulation?
Sealing the crawl space with a heavy-duty vapor barrier on the floor and walls, closing the vents, and adding a dehumidifier. The result is a dry, conditioned space instead of a damp, vented one.
Why does my crawl space smell musty upstairs?
Up to half of the air in your living space comes up from below. A damp crawl space sends moisture, mold spores and odors straight into the house. Encapsulation cuts that off at the source.
Should the vents be open or closed?
Closed and sealed. In Maine's humid summers, open vents pull in warm moist air that condenses on cold pipes and joists. A sealed, dehumidified crawl space stays drier year-round.
Does encapsulation lower heating bills?
Yes. Sealing air leaks from below and, optionally, spray-foaming the crawl space walls keeps floors warmer and reduces heating costs. Insulation work may also qualify for Efficiency Maine rebates.
What if there is standing water or mold down there?
We handle that first. Standing water gets a drain and sump pump, and existing mold is remediated by our IICRC and MICRO certified crew before the vapor barrier goes down.
How long does crawl space encapsulation take?
Most encapsulations in the Bangor area take one to three days depending on size, access and whether water or mold has to be addressed first.
Related services in Bangor & Central Maine
Get a free estimate in Bangor, ME
Tell us about your crawl space encapsulation project. We reply with a time for a free on-site visit.
Need it today?Call (207) 291-6558