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Serving Bangor, Hermon & Central Maine
Foundation Crack Repair & Sealing in Bangor, ME
Leaking foundation cracks sealed from the inside, with drainage that keeps Maine freeze-thaw cycles from opening them again.
- 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.
Why do foundation walls crack in Maine?
Concrete shrinks as it cures. Maine's freeze-thaw cycles then push saturated soil against the wall every winter and spring. Most vertical and diagonal cracks are from shrinkage and settling.
Horizontal cracks can signal soil pressure and need a closer look. A hairline crack that only weeps is a routine repair. A crack that is widening, offset, or horizontal should be assessed for movement first.
Any crack that lets water in should be sealed before it feeds mold and rots framing. We find the source on a free inspection and recommend the right fix.
Foundation Sealing: Stop Water Where It Gets In
A leaking crack is a waterproofing problem. Foundation sealing closes the path water uses to get in, and drainage takes away the pressure that pushes it through.
Seal the crack
Leaking cracks in poured concrete walls are sealed from the inside, so the repair bonds through the full wall thickness. Sealing one or two cracks is normally a single visit.
Seal the wall
Block and fieldstone walls leak in more than one place. We seal and drain them with dimple board and a perimeter drain to a sump pump.
Keep water off the wall
Outside, French drains and downspout drainage keep water away from the foundation so it cannot freeze, expand, and crack the concrete.
Water pooling against your foundation after rain?
Exterior waterproofing fixes the cause outside the wall, and pairs with crack sealing inside. Most French drain and downspout projects take one to three days.
How do you repair a leaking foundation crack?
Poured concrete walls
We seal the crack from the inside so the repair bonds through the full wall thickness. Where water pressure stays high we add interior drainage so the wall is not fighting standing water.
Block and stone foundations
Older Bangor and Hampden homes often sit on block or fieldstone. Those walls are sealed and drained with dimple board and a perimeter drain to a sump pump, not a single injection.
Will the crack come back?
A properly sealed crack should not leak again. Because Maine soils keep moving, we also address the water pressure behind the wall with grading, downspout drainage, or an interior drain.
How long does foundation crack repair take?
Sealing one or two cracks is normally a single visit. Wall sealing with a new interior drain and sump pump takes one to three days. You get a written estimate and schedule after the free inspection.
Pair crack repair with sump pump installation or exterior French drains when water is still reaching the wall. Existing mold is handled by our IICRC and MICRO certified crew on mold removal.
What does foundation crack repair cost in Maine?
$500–$2,500
Typical range
Sealing a single leaking crack from the inside is typically in this range per crack. Multiple cracks, wall sealing with dimple board and drainage, or cracks that show movement in the foundation cost more and start with a structural assessment.
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 working from our Hermon office, with 20+ years of experience and 500+ completed projects across Central Maine.
What our customers say
5.0 rating · 27 Google reviews
Linda Scrofano
August 2024 · Google
“We contacted Nick to discuss a serious foundation issue and a mold issue with a property we intended to purchase. Nick came out to look at the issues within just a couple of days and provided us with a comprehensive estimate and discussed the details of the proposed repair with me. He also answered some questions I had with mold in another area of the house. The quote is extremely reasonable for the work to be done.”
Nicole Burgess
July 2023 · Google
“Nason’s Home Solution was recommended after an inspection was completed on the home I was buying. Nick and his team did a great job in mold remediation in the attic and was quick to respond when I inquired about the result while still living in another state. I later hired him to fix a leak in the basement wall and install larger gables for the attic.”
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!”
Foundation crack repair questions from Bangor-area homeowners
Why do foundation walls crack in Maine?
Concrete shrinks as it cures, and Maine's freeze-thaw cycles push saturated soil against the wall every winter and spring. Most vertical and diagonal cracks are from shrinkage and settling; horizontal cracks can signal soil pressure and need a closer look.
Is a leaking crack serious?
Any crack that lets water in should be sealed before it feeds mold and rots framing. A hairline crack that only weeps is a routine repair. A crack that is widening, offset, or horizontal should be assessed for structural movement first.
How do you repair a leaking foundation crack?
For poured concrete walls we seal the crack from the inside so the repair bonds through the full wall thickness. Where water pressure is high we add interior drainage so the wall is not fighting standing water.
Can you fix cracks in a block or stone foundation?
Yes. Block and fieldstone foundations, common in older Bangor and Hampden homes, are sealed and drained differently than poured walls, usually with wall sealing, dimple board and a perimeter drain to a sump pump.
How long does foundation crack repair take?
Sealing one or two cracks is normally a single visit. Wall sealing with a new interior drain and sump pump takes one to three days. You get a written estimate and schedule after the free inspection.
Will the crack come back?
A properly sealed crack should not leak again. Because Maine soils keep moving, we also address the water pressure behind the wall with grading, downspout drainage or an interior drain so new cracks are far less likely.
Related services in Bangor & Central Maine
More home performance services and towns we serve
Related work we do across Central Maine includes interior basement waterproofing, exterior French drains and downspout drainage, sump pump installation, crawl space encapsulation, basement finishing, spray foam and blown-in insulation, air sealing, BPI energy audits and mold removal and remediation.
We work in homes throughout the region, including Millinocket, Lincoln, Bangor, Hampden, Old Town, Orono, Hermon, Holden, Brewer, Ellsworth, Bar Harbor, Belfast, Waterville, Newport, Dexter, Dover-Foxcroft and Greenville.
Our guides go deeper: Why Insulation and Air Sealing Are the Best Energy Investments for Your Maine Home, 5 Warning Signs Your Crawlspace Is Costing You Money and Mold in Maine Homes: What Every Homeowner Needs to Know.
More about us: all of our services, the full list of towns we serve, our certifications and team, answers to common questions, our home performance blog, how to book a free assessment, privacy policy and terms of service.
Get a free estimate in Bangor, ME
Tell us about your foundation crack repair project. We reply with a time for a free on-site visit.
Need it today?Call (207) 291-6558