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Best basement waterproofing pros near Sumas, WA

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

Near Me Roofing Company
5.0(
74
)
Basement Drainage Channels - Repair

Serving Sumas, WA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"Excellent service and very thorough with explanation and getting the right. I researched many skylight installation companies and decided to hire Ari and Elijah. I will recommend my colleagues and friends and family. I will absolutely use this roofing company for any roof work on my house."
Response time4 days
Recommended by80%of homeowners
Avatar for American Concrete N Masonary
American Concrete N Masonary
5.0(
6
)
Basement Drainage Channels - Install

Serving Sumas, WA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"I needed a garden path from my house to my art studio, and I wanted it to match the concrete path already going from my house to the garage. Not a big job, but American Concrete Construction was willing to take it on. Their main guy, Sinisia Moli, came right out one day to evaluate the job, then returned the next day to survey, dig out the path, frame it, and put in rebar. Cement was poured the following day. And now I have my garden path. Which, incidentally, matches the other, much older path perfectly. ... Sinisia Moli of American Concrete Construction is a man of experience, good aesthetics, and common sense. He is also friendly, upbeat, and generally a pleasure to have around. Best of all, unlike so many of his colleagues who work in various construction trades, Moli talks to women. He doesn’t insist on talking to your husband. ... I am definitely keeping American Concrete Construction in mind for future projects."
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+29

Recommended by100%of homeowners
Ryan's Remodeling
4.3(
3
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Sumas, WA and surrounding areas

In business since 2008

Free estimates

"I scheduled the work for early November thinking the job was a three day affair.  We did not have another bathroom so I needed it done as efficiently as possible, we have 900 sq feet so everything was in disorder.  The contractor rescheduled with me, the day before he was supposed to come for the following week. When he did come, he met me at the hardware store to help me choose items, and to get supplies.  He was on time and communicative, and helped me understand the remodel process.    After working to take out the tub, he did not return for the week, did not call or answer my calls or texts,then finally he called, returning on the weekend.
 I felt as if he did good work and did not cut corners and had some integrity about his workmanship. So he went ahead with the second part of the remodel: putting in some new drywall and the ceiling fan and heater.  However, things started to disintegrate, he never came when he said or was late and did not always call. He always had a seemingly legitimate excuse. But in the end a 6-7 maybe 8 day job took over a month!  I ended up finishing the job myself:  painting and putting up new towel racks.
Its a shame, I thought his workmanship good but can't ask him back for the third part of the remodel. It's almost Christmas and I'm painting the bathroom!
"
Recommended by66%of homeowners
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Basement Waterproofing FAQs, answered by experts

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

To ensure your basement walls are waterproof, it's crucial to address any existing moisture issues before finishing. Inspect for signs of water seepage, such as dampness or discoloration, and repair any leaks or cracks. Install a vapor barrier to prevent moisture from penetrating the walls, and consider waterproofing paints or coatings.

Proper drainage systems, such as interior or exterior waterproofing, can also be beneficial.

In most climates, contractors recommend closing your crawl space vents in winter. Keeping them shut protects your crawl space from freezing temperatures, pests, and cool breezes that can lead to chilly floors in your home. However, it's often best to speak with a local crawl space team about your specific design and its relationship to the winter season.

The most expensive foundation repair method is to install helical piers. Helical piers are a type of steel pier used to support sinking foundations in areas with poor soil conditions or deep bedrock. This foundation repair method can cost up to $3,000 per pier, including labor, because of its material and labor-intensive installation process. Total foundation repair costs can easily reach over $20,000 using this method.

Yes, you can add a bathroom to an unfinished basement, but you’ll want to take proper precautions if doing so. As with any bathroom addition, you’ll need to make sure that it’s approved by local building authorities first. With unfinished basements, you especially need to keep an eye on proper ventilation practices.

The Sumas, WA homeowners’ guide to basement waterproofing services

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