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TRUSTED BY WINDHAM, ME HOMEOWNERS

  • Average homeowner rating star icon3.9
    Average homeowner rating
  • Verified reviews icon35
    Verified foundation repairs reviews

Top-Rated Foundation repair specialists in Windham - Updated Nov 2026

Avatar for A.G. Construction, LLC
A.G. Construction, LLC
4.8(
6
)
Foundation Drainage - Install or Replace

Serving Windham, ME and surrounding areas

Approved

In business since 2010

Free estimates

Offers commercial services

"Andrew and his crew did an amazing job building this garage. Even though he ran into some issues with the supplier of products he went above and beyond to make sure we were kept informed. Additionally, he also replaced (and improved) an existing garage door in the lower level of our home. He also repaired some siding on our house. They even put our two garage door openers in. Overall, we were more than please with his work and his crew."
Jefferson Deck Rebuild
Jefferson Deck Rebuild
Jefferson Deck Rebuild
Camp on post
Camp on post

+27

Response time2 days
Recommended by100%of homeowners
Avatar for The Eagles LLC
The Eagles LLC
New to Angi
Concrete Foundation - RaiseConcrete Foundation - RepairPoured Concrete Wall - Repair

Serving Windham, ME and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

The Eagles are specialized in Masonry and Waterproofing. The Eagles Focus on New Buildings, Repairs, Designs, Extensions, demolitions, Etc. We Provide work related to bricks, chimneys, retaining walls, veneer stone, blue stone, granite stone, pavers, Asphalt driveways, concrete slab, basement foundations, patio, decking, fencing, cinder block walls and snow removal. We also provide free estimates for any project around Massachusetts and New Hampshire. Please give us a call or mail at any time to provide an appointment or meeting to your location to provide an instant estimate or for building any designs. \n

Chimney Completely Finished
Chimney Repointing
Stairs Restoration
Stairs Restoration
Stairs Restoration

+67

6 neighbors recently requested a quote
Avatar for octagon-restoration
octagon-restoration
4.7(
96
)
Foundation Drainage - Install or ReplaceFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Windham, ME and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"I called Octagon the day after we had an upstairs water leak. The next day, Octagan had scheduled a technician to assess the damage and set up the mitigation solutions to dry out the damage before mold could set in. Everyone from Octagon was friendly, professional and very responsive. If you need a fast, reliable and effective response, you will find it with Octagon!"
Water extraction.
Octagon vehicles
Drying structure damaged by water.
MOLD REMEDIATION
Dirty air duct.

+2

Response time6 hrs
Response rate100%
Recommended by90%of homeowners
DryLock Systems
3.8(
68
)
Concrete Foundation - RepairFoundation Drainage - Install or ReplaceFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Windham, ME and surrounding areas

In business since 1985

Free estimates

Warranties offered

"Rob and Jacob did an amazing job repairing our sump pump setup and repairing leaks in our basement. They are very professional and helpful, worked cleanly and explained everything that they were doing. We recommend them highly."
Response time2 days
Recommended by97%of homeowners
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Foundation Repair FAQs, answered by experts

Efflorescence can damage a concrete slab for two to three years. After that, it resolves on its own once the surrounding salts are gone.

Concrete can crack from general wear, improper installation, or in response to uneven support from the soil underneath. Small, thin cracks on the surface of aging concrete are usually a result of normal wear and tear, while cracks on new concrete more likely indicate a problem with installation. Larger cracks or uneven steps can signify a much more severe issue. A concrete contractor should be able to diagnose the cause and repair concrete cracks for you.

You'll find a slurry of natural and synthetic polymers, rubbers, epoxies, and resins used to bond old concrete to new concrete. The right bonding agent depends on the method of concrete pouring you choose and whether you're adhering concrete over concrete or concrete over sand and gravel. Some concrete resurfacing mixtures contain bonding chemicals as well.

Yes, foundation repairs are worth it if you have a significant problem or see signs that could worsen if not dealt with. If your foundation fails, your home can lose up to 20% of its value. Protecting your home from serious structural damage and avoiding more costly repairs later is well worth the money.

You could DIY the work, but unless you have plumber’s knowledge for identifying and fixing a slab leak and specialized equipment in your tool shed, attempting to DIY your slab leak repair isn’t a good idea. It’s simply not something that the average homeowner can take on themselves, regardless of how many successful DIY projects they’ve got under their belt. You could, however, do something simple like foundation waterproofing yourself to save some money on the post-repair work.

The Windham, ME homeowners’ guide to foundation repairs

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