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Best basement waterproofing pros near Rainier, WA

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TRUSTED BY RAINIER, WA HOMEOWNERS

  • Average homeowner rating star icon3.9
    Average homeowner rating
  • Verified reviews icon14
    Verified basement waterproofing services reviews

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

Avatar for TerraFirma
TerraFirma
4.0(
100
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - RepairBasement Drainage Channels - Install

Serving Rainier, WA and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"Had huge foundation problems at a project of mine on the waterfront. We used terrafirma to both waterproof the entire basement AND lift the foundation. 10/10 would recommend. extremely communicative, very knowledgeable, and even brought a crew in from Oregon to help us stay on schedule. Oscar and jorge got the job done extremely quickly and Seth was fantastic as my project manager."
A System Design Specialist helping a homeowner
Encapsulating a crawl space
Fleet of vehicles in our Portland, Oregon locatio
Loading up our truck for a piering job
Loading up a truck for a waterproofing job

+33

Response time2 hrs
Response rate100%
87 neighbors recently requested a quote
Near Me Roofing Company
5.0(
74
)
Basement Drainage Channels - Repair

Serving Rainier, 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 Pinpoint Construction LLC
Pinpoint Construction LLC
5.0(
7
)
Basement Drainage Channels - Install

Serving Rainier, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Credit card accepted

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business, we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

Gravel driveway
Ruts in the driveway which causing the water to run down the driveway?
Well utility trench
Gravel driveway
Driveway work in North Kitsap

+15

1 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
4.6(
1,026
)
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Rainier, WA and surrounding areas

Approved

In business since 2013

Emergency services offered

Warranties offered

"Dylan from Harts Services was prompt, professional and courteous... he scoped out three unfinished basement floor drains to determine why they weren't draining properly... he even invited me to observe the process which I did... Dylan was able to diagnose the problem and provide me with viable solutions and costs and within a short period of time emailed me that information to make an informed decision... quite pleased with the service and would/will not hesitate to engage Harts Services again"
Digging out the old broken pipes
House Repipe
House Repipe
House Repipe
House Repipe

+13

Recommended by91%of homeowners
Avatar for Diversified Crawlspace Servs
Diversified Crawlspace Servs
3.9(
25
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Rainier, WA and surrounding areas

Approved

In business since 1992

Free estimates

Emergency services offered

"We had a foot of water in our crawl space after the snow and 6 in. of rain from the December 2021 storms. I had called several companies to come out to take a look and give quotes. Ethan from diversified was the 3rd quote we received. Ethan explained the issue, explained what they would do to remedy it, and answered all my questions. He sent me the quote which was very resonable. BE SURE TO GET SEVERAL QUOTES. ONE COMPANY QUOTED US DOUBLE OF WHAT WE PAID DIVERSIFIED. They were able to get a team out two days later. The team was on time, professional, and did really good work. We ended up needing a sump pump due to ground water coming up. They applied a mold application and completed the work in a day. I highly recommend these guys and did my research prior to having them do the work. I am very impressed and happy we chose them."
crawlspace drainage
crawlspace drainage
crawlspace drainage
crawlspace drainage
crawlspace drainage

+18

7 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for Rain Pros Inc
Rain Pros Inc
4.7(
435
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Rainier, WA and surrounding areas

In business since 2006

Free estimates

Warranties offered

"These guys did a great job on the drain cleaning and explaining to me how the drains were connected beneath and outside my home. I felt like the price was quite fair. I had gotten an estimate to re-do a french drain outside my basement after that experience, and I told them I would get back to them in a few months due to cost. It was a good price, but repairs are repairs, and most of them are expensive. I tried getting these guys out again a few months later, but I had a really hard time getting in touch with anyone. I was happy with the work from before, for sure."
Before
Sump Pit with Sump Pump
Downspout coming off of a barn
4-inch PVC installed with the black asphalt emulsion and custom made flashing up.
Excavated

+51

Recommended by94%of homeowners
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Showing 1-10 of 74
Basement Waterproofing FAQs, answered by experts

Yes, crawl spaces can attract bugs, especially since moisture tends to build up in the space, and moisture attracts pests. A good way to prevent pest infestation in your crawl space is to install a vapor barrier—called crawl space encapsulation—on the interior to seal the space, along with a French drain or some other kind of foundation drainage system outside to keep runoff out of your crawl space. You can also seal foundation cracks and repair damages to cut off access to pests.

Crawl space foundation problems can stem from a few different issues, but the most common are moisture and water problems and soil instability. Moisture and water issues are often a result of poor drainage, which can lead to water intrusion and soil expansion and contraction, leaving your foundation under added stress. A few things can cause soil instability, including poor drainage, karst landscapes and resulting sinkholes, and poorly compacted soil during construction.

As the first layer of water protection for your roof deck and the building materials below, underlayment is designed to prevent water damage, so it’s okay if it gets wet. However, you shouldn’t rely solely on underlayment for protection. If rain interrupts your roof project and you have all of the underlayment down, you’ll likely be fine, but you should install shingles over that layer as soon as possible, as long-term exposure can lead to water damage.

Typically, waterproofing a basement should last up to 10 years. However, it’s worth noting that with proper maintenance and depending on the waterproofing method and installation quality, you can probably squeeze another decade out of it.

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.

The Rainier, WA homeowners’ guide to basement waterproofing services

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