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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

A leak under your foundation from a water supply line or sewage line is likely to lead to water pooling on certain areas of your property during rainfall, abnormally fast-growing or green grass in certain sections of your lawn, and differential settlement of your foundation, which can result in large foundation cracks, windows and doors failing to operate properly, a wavy or sloping roofline, or damages or irregularities in your interior walls, including cracks and bulging. If it’s a plumbing line embedded in your slab, you’ll also likely notice above-average water bills.

Yes, sustainable mixes and sealants minimize environmental impact.

You can use a level or straight-edge to test for plumb foundation walls and a level slab, a level or a ball to check for sloping floors inside your home, and a hygrometer to look for moisture in your underhome area. Aside from these DIY tests, it’s important to get a foundation repair specialist or structural engineer to test the foundation to see if it’s supporting your structure properly. They can determine if the loads on the concrete are uneven or need reinforcement.

Yes, all basement floors crack in response to the natural settlement of the soil around them and from concrete shrinkage as it cures, and you’ll see hairline cracks as a result. However, you should keep an eye on your basement floor to see if cracks continue to lengthen or widen or show signs of water intrusion. In any of these cases, the problem is likely not settling or shrinkage, and a professional repair is necessary.

You can seal a concrete slab by cleaning the surface, filling in any cracks, etching the surface, applying a sealer, and letting it dry. Concrete slabs don't typically need sealing, but you can use a topical concrete sealer if you notice signs of water damage. If you haven't already fixed the cause of the leak, then you'll want to repair the plumbing before you seal a concrete slab.

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.