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Top-Rated Foundation, basement or crawlspace waterproofing / encapsulation pros in Portland - Updated Nov 2026

Avatar for octagon-restoration
octagon-restoration
4.7(
96
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Portland, ME and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"I highly recommend Octagon Cleaning and Restoration. We recently purchased a house on the water and discovered that we had a mold issue in our basement. Matt and his crew were professional, informed us what needed to be done and completely eliminated the mold and the musty smell. Matt was very responsive to my texts, answered all my questions and a great representative of 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 Marshall Home Pros
Marshall Home Pros
3.8(
130
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Portland, ME and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"They messed up the ceiling part in a corner.  They got the wall paint mixed in with the ceiling paint.  They did try to fix it.  We do have cathedral ceilings.  It took them a long time to paint.  I was a little frustrated or upset by the fact that the painter didn't have an extension ladder and ended up standing on my wood stove to reach.  It made me so nervous.  I really didn't want them to come back to fix the ceiling.  They did smudge it pretty bad, but I just choose to not look at it. It wasn't exactly what I would have expected from a professional painter, but they did an okay job. They were very responsive.  The owner called me the next day to see how it went.  They were very punctual and professional.  I guess it would be somewhat shady with the lack of ladders they had.  I would probably use them again.  Because of the difficult job, I think overall they probably are decent painters, it was just above their expectations.  They were prompt and worked right thru until they were done."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+32

Recommended by72%of homeowners
Avatar for Northeast Home Inspections
Northeast Home Inspections
4.8(
6
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Portland, 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
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FAQs for foundation, basement or crawlspace waterproofing / encapsulation projects in Portland, ME

Yes, crawl space encapsulation is a good investment. It improves your home's energy efficiency and air quality, boosting its value. With routine inspections and maintenance, encapsulation provides a long-lasting solution to moisture and pest issues. Regular check-ups protect your investment, enhance energy efficiency, and maintain your home's structural integrity. If your home is prone to pests or moisture seepage, encapsulating your crawl space is definitely worth it.

A vapor barrier is a thin sheet of plastic that prevents moisture from seeping into your crawl space, while insulation prevents unconditioned air from entering. Combining both insulation and a vapor barrier creates a dry, temperature-stable environment. Some insulation products serve both purposes, enhancing energy efficiency and protecting against moisture and temperature fluctuations.

The Portland, ME homeowners’ guide to foundation, basement or crawlspace waterproofing / encapsulations

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