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Serving Bangor, Hampden & Central Maine
Basement Waterproofing in Bangor, ME
Interior drainage, sump pumps and foundation sealing that keep Central Maine basements dry through spring melt and fall storms.
- 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.
Basement Waterproofing Cost in Maine
$5,000–$15,000
Typical range
Simple repairs can start around $1,500. Full interior drainage systems with a sump pump typically run $5,000–$15,000 depending on basement size, how much water is coming in and whether a battery backup is added.
Every job starts with a free, no-obligation estimate. You get the exact price in writing before any work begins.
Why Waterproofing Matters
Maine's climate creates unique challenges for basements and crawlspaces. Heavy rain, snowmelt, and high water tables can all lead to moisture problems that damage your home and affect your family's health. Unchecked moisture often leads to mold growth and poor air quality.
Protect Your Investment
Water damage can destroy belongings and reduce property value.
Protect Your Health
Moisture leads to mold growth, which can cause serious health issues.
Preserve Structure
Water weakens foundations and causes structural damage over time.
Our Waterproofing Solutions
We offer comprehensive solutions to address any water intrusion problem. Pairing waterproofing with proper insulation and an energy audit maximizes your home's efficiency.
Interior Drainage Systems
Our interior drainage systems capture water that enters your basement and direct it to a sump pump for removal.
- Installed along basement perimeter
- Collects water before it reaches your floor
- Works with any foundation type
- Minimal disruption to install
Sump Pump Systems
Reliable sump pumps remove collected water from your basement, protecting against flooding.
- Battery backup options available
- High-capacity pumps for heavy water flow
- Alarm systems for peace of mind
- Regular maintenance available
Crawlspace Encapsulation
Complete crawlspace solutions that eliminate moisture, improve air quality, and protect your home's foundation.
- Heavy-duty vapor barriers
- Sealed vents and access points
- Dehumidifier installation
- Insulation options available
What we install in Bangor-area basements
Spring melt and fall storms push groundwater against Central Maine foundations. We stop it at the source, then move what remains to a pump.
Interior drainage
A perimeter channel collects water at the footing before it reaches the floor. It works on poured, block, and stone walls common around Bangor and Hampden.
Sump pumps
The pump is what actually removes the water. We size it to the inflow, add a battery backup for storm outages, and discharge away from the house. Sump pump installation in Bangor.
Foundation crack repair
Freeze-thaw opens hairline leaks in poured walls. We seal them from the inside and add drainage when pressure stays high. Foundation crack repair in Bangor.
Vapor barrier and wall sealing
Dimple board and a sealed vapor barrier keep residual moisture off the wall. Pair with crawl space encapsulation when the space is unfinished.
Warning Signs to Watch For
Catch water problems early before they cause major damage.
Basement Warning Signs
- Water pooling on basement floor
- Damp or wet walls
- White mineral deposits (efflorescence) on walls
- Musty odors
- Mold or mildew growth
- Cracks in foundation walls or floor
- Peeling paint or wallpaper
- Rust stains on floors or walls
Crawlspace Warning Signs
- Standing water or saturated soil
- Musty smells rising into living areas
- Sagging or bouncy floors above
- Visible mold on floor joists
- High humidity in the home
- Pest infestations
- Wood rot on structural members
- Condensation on pipes or ductwork
Our Work
See examples of our waterproofing projects throughout Central Maine.
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
Ellie Leighton
March 2022 · Google
“Nick and his team did AMAZING work! We had a tricky situation and they were very responsive to help us fix our basement problems. They were very reasonably priced as well. I would highly recommend their services to anyone in the area!”
Adrienne Leppold
December 2021 · Google
“Hired Nason's to install a sump pump after repeated flooding in my basement. Can't speak highly enough. So happy with the quality of their work and the pricing was so reasonable and fair. Nick and his team were efficient, courteous, respectful, and clean.”
Nate Curtis
January 2026 · Google
“I've used Nick for all of my insulation and waterproofing needs and he's never failed me. Always on time, always polite, always a good price. I have nothing but amazing things to say about him and his team. We recently got our house re-insulated and it cut more than half of our heating bill.”
Basement waterproofing questions from Bangor-area homeowners
Why is my basement wet?
Basement water usually comes from hydrostatic pressure (groundwater pushing against the foundation), surface water from roof runoff or grading, condensation, or a plumbing leak. We find the source during a free inspection and recommend the right fix.
What is the difference between interior and exterior waterproofing?
Interior waterproofing collects water that reaches the basement and moves it to a sump pump. Exterior waterproofing keeps water away from the foundation with French drains and downspout drainage. Interior systems cost less and disrupt less; severe problems may need both.
Do I need a sump pump?
If water is getting into your basement, almost always yes. The pump removes what the drainage system collects before it can flood the floor. We recommend a battery backup so the pump keeps running when a storm knocks the power out.
How long does basement waterproofing take?
Most interior drainage and sump pump installations in the Bangor area are finished in one to three days. Foundation crack injection is usually a single visit. We give you a schedule with your written estimate.
Will waterproofing stop the musty smell and mold?
Dry basements do not grow mold. Once the water source is controlled, existing mold can be remediated by our IICRC and MICRO certified crew, and humidity stays down. Many customers pair waterproofing with basement insulation for a warmer, drier space.
Which towns do you waterproof basements in?
We are based in Hampden and serve Bangor, Brewer, Orono, Old Town, Hermon, Veazie, Orrington, Holden, Eddington and the rest of Central Maine. Call if you are unsure whether we cover your town.
Related services in Bangor & Central Maine
Get a free estimate in Bangor, ME
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