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Best basement waterproofing pros near Thomaston, ME

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Top-Rated Basement waterproofing pros in Thomaston - Updated Nov 2026

Avatar for octagon-restoration
octagon-restoration
4.7(
96
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Thomaston, 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
Avatar for New England Home Renovations LLC
New England Home Renovations LLC
4.0(
311
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Thomaston, ME and surrounding areas

In business since 1983

Free estimates

Emergency services offered

"This project was supposed to be "phase one" of three projects that we hired NE Renovation to complete.  On day one, the basement was prepped - all carpeting was covered and baseboard heating covers were removed.  Sheetrock was supposed to be installed on the next day, but due to a serious injury to the sub-contractor, that was not done.  Instead, demolition work began on what was supposed to be "phase two" of the project - the remodeling of a bathroom.  We had not been expecting this change in schedule and to be fair, neither did anyone else.  The basement project was put on hold until an alternate plan could be made.  A few weeks later, work began again on the basement.  The sheetrock was installed very well and in quick time.  The plaster work was completed perfectly which was no small task given the length of the walls. Additionally, the paint job was done perfectly.  The new six-panel doors, wall mounted television, upgraded lighting, and new baseboard heating covers helped complete the transition of the space from 1970 to 2012!

The value we received from this project has exceeded our expectations.  We added a pool table and two sectional sofas to complete our new recreational space.  It serves as a great "man cave" as well as a great place for family and friends to hang out.  NE Renovations did a great job renovating our basement."
Before
After's
New boiler install
Removal of cast Iron to PVC.
Additional Photos

+37

Recommended by89%of homeowners
POST construction Facebook
4.3(
12
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Thomaston, ME and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"Justin was very professional, competent and thorough. He took pictures of the the issues with my skylight so that I could fully understand the problem and set up a time the very next day to repair it. He was very fair in his pricing and his communication was excellent. He knows what he is doing and does it in a very timely manner. I would also give him high marks for his accountability and promptness. I will definitely hire him again."
Response time1 day
Recommended by90%of homeowners
Avatar for Northeast Home Inspections
Northeast Home Inspections
4.8(
6
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Thomaston, ME and surrounding areas

In business since 2019

Free estimates

Credit card accepted

"I hired him for a home inspection, a radon air test, and a septic inspection. He arrived within 10 min of appointment time. His home inspection was very thorough and a comprehensive report provided in a timely manner. His radon air test was completed in the basement, rather than the lowest living area (stated that there was a laundry hookup in the basement so it had to do down there, despite a full laundry room on the second floor)"
Attic
Attic Access
Septic
Septic
Septic

+15

Response time4 hrs
Recommended by100%of homeowners
Bennett Family Carpentry& Remodeling
4.0(
5
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Thomaston, ME and surrounding areas

In business since 1989

Free estimates

Warranties offered

"Great work! Excellent customer service. Very knowledgeable in his field. Personable. I will be hiring him in the future in order to build my new home. I will be recommending Bob to anyone who is considering a construction project."
The start
day 1
McKenzie Ramp
 Out with the old
The beginning

+19

Recommended by100%of homeowners
Avatar for Winkler Construction
Winkler Construction
5.0(
1
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Thomaston, ME and surrounding areas

In business since 2014

Free estimates

Small jobs welcome

"Tyler is great to work with! Communication is key when doing anything and he was always accessible for any questions concerns or changes. He put in my hardwood floor and tiled my bathroom as well as tiling a back splash in my kitchen. Weâ  ve also discussed siding my shed and perhaps a walkway. He pretty much does everything! I highly recommend."
Recommended by100%of homeowners
Armstrong Landscaping & Excavation, LLC
4.0(
1
)
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Thomaston, ME and surrounding areas

In business since 1999

Free estimates

Emergency services offered

Armstrong Landscaping & Excavation LL is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time6 days
Recommended by100%of homeowners
Vannah Construction, LLC
New to Angi
Basement Drainage Channels - Install

Serving Thomaston, ME and surrounding areas

In business since 2010

We are dedicated to providing our clients with the very best in installation, service and repair for your heating and cooling needs. Our company is built on honesty and integrity. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

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Basement Waterproofing FAQs, answered by experts

Some disadvantages of crawl spaces are mostly regarding the air itself—moisture build-up and poor ventilation, which can cause problems both in the house and underneath it, even damaging the foundation itself. Crawl spaces are difficult to access and often invite unwanted pests during the hot summer months and the cold winter ones. These hard-to-seal spaces are also susceptible to water damage during periods of heavy rain or melting snow.

If a crawl space isn’t vented, there can be moisture buildup, which can lead to mold damage, easily destroying the foundation of your home. A closed-off crawl space can trap heat, which can be useful in the winter, but can also trap dangerous gases and prevent clean air from entering the home through the floorboards.

Living in a finished basement is acceptable, but only if the space has the proper points of egress and includes smoke and carbon monoxide (CO) detectors to ensure the safety of the occupants. A good way to ensure your finished basement is suitable for use as living space is to get the basement finishing project properly permitted.

Whether to waterproof your basement from the interior or exterior depends on several factors, including your budget.

Exterior waterproofing is generally considered the superior method because it stops water at the source, preventing it from seeping into and damaging your basement walls. This approach offers the most protection, making it ideal if you use your basement for storage.

By contrast, interior waterproofing is often less expensive and requires less labor because the area is more accessible.

For maximum protection against water leakage and moisture, applying waterproofing measures to both the inside and outside is the best solution. However, if you must choose only one, stopping water from the outside is the most effective approach to preserve your foundation and prevent damage.

Preventing water accumulation involves regular inspections, maintaining effective drainage systems, ensuring proper roof maintenance, and taking preventive measures against heavy rainfall or floods.

The Thomaston, ME homeowners’ guide to basement waterproofing services

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