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Basement Waterproofing in Mercer Island, WA

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Are you experiencing issues with dampness, mold, or musty odors in your basement? Mercer Island's climate, with an average annual precipitation of about 36 inches, can lead to water infiltration and significant structural damage if not addressed. Our basement waterproofing solutions, including interior drainage systems, sump pumps, and vapor barriers, are designed to keep your basement dry and your home healthy.

Groundworks, North America's premier foundation repair company, proudly serves Mercer Island, Washington, by combining the expertise of local brands such as Rainy Day Crawl Space & Basement and Matvey Foundation Repair. Together, we offer exceptional customer service and top-quality foundation and waterproofing solutions. Our mission is to ensure every home in Mercer Island remains safe and stable. Contact us today for your free inspection.

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Groundworks is Mercer Island's Basement Waterproofing Expert

Serving Mercer Island and the surrounding areas
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Recent Work Completed Near You

8,421 basements waterproofed by the Seattle branch

254 basements waterproofed in Mercer Island

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Why your neighbors trust Groundworks

We've earned 475 five star reviews.

"My experience with Matvey exceeded my expectations. From Matthew's very detailed accounting of repairs for our sunken walkway to Eli's brilliant workmanship of making things perfect, we are so pleased with the end result. Matthew was very patient as I asked questions regarding the repairs and was very informative on the process. Eli took time to make sure that everything was done to perfection and he did a great job of cleaning up afterward. Thank you so much!"

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Our in-house crews are certified and local to your area.

Our work comes with a nationally backed warranty.

Types of Basement Damage in Mercer Island

Common Causes of your Basement Problems in Mercer Island

Foundation Cracks

Cracks in foundation walls or floors can let water seep into your basement, especially during heavy rain.

Poor Drainage Systems

Ineffective drainage, such as clogged gutters, downspouts, or poorly graded yards, directs water toward your foundation.

Hydrostatic Pressure

Water in the soil builds pressure against basement walls, filling the clay bowl, and forcing water through cracks and joints.

High Water Table

Rising groundwater during heavy rain or snowmelt can seep into your basement through cracks or porous concrete.

Faulty or Missing Sump Pump

Water from heavy rainfall or flooding can accumulate in your basement without a working sump pump.

Plumbing Leaks

Leaking pipes or fixtures near your foundation can saturate the soil, causing water to seep into your basement and cause moisture related problems.

Basement Waterproofing Solutions We Provide For You in Mercer Island

Control Wall Moisture

What We Do

  • Inspect basement for vulnerabilities
  • Take custom measurements
  • Provide lasting moisture solutions

What We Use

 Vapor Barrier Learn More

Control Groundwater Seepage

What We Do

  • Identify leakage sources
  • Consider your home's unique needs
  • Install a reliable drainage system

What We Use

 Sump Pump Learn More
Drain System Learn More
FreezeGuard Learn More

Control the Environment

What We Do

  • Recognize ventilation insufficiences
  • Offer options for moisture control
  • Regulate humidity levels effectively

What We Use

 Dehumidifier Learn More

Our Other Services in Mercer Island

Concrete Lifting
Crawl Space Repair
Foundation Repair

Our Groundworks' Mercer Island Office Serves You

Our Address

18915 16th Ave S, SeaTac, Washington 98188

Contact Us

(855) 976-0804

About Us

Meet our Mercer Island team, see our
service area, and get financing details
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Proudly Serving Mercer Island and Surrounding Areas

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Trust the experts at Groundworks

How it works

Straightforward and simple process

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Schedule an
inspection

Upon arrival, our Inspector will introduce themselves and chat with you about the problems you're experiencing. Based on the information you provide them, they'll then create a plan of action to examine your home inside and out.

Receive a detailed repair plan and quote icon

Receive a detailed
repair plan and quote

Once the inspection is complete, the Inspector will sit with you and present their findings. And because we provide same-day estimates, you'll have all the cost and financing information you need to make a decision right away.

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Get the work done
when you're ready

When you're ready to move forward with repairs, we'll help you choose an installation date that works for your schedule, and notify our Installation team immediately of the upcoming work.