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Products & Services
Basement Repair Services & Products
Basement Dehumidifiers
Basement Sealing
Basement Seepage Solutions
Basement Wall Repair
Flood Vents
Drain Tile Installation
Dry Basement Systems
Exterior Waterproofing
Flooded Basement Repair
Foundation Waterproofing
French Drain Installation
Interior Waterproofing
Leaky Basement Repair
Sump Pump Drainage
Sump Pump Installation
Sump Pump Repair
Sump Pump Battery Backup
Wet Basement Solutions
Basement Insulation
Basement Crack Repair
Basement Wall Cracks
Aspen Air Purifier


Crawl Space Repair Services & Products
Crawl Space Access Doors
Crawl Space Dehumidifier
Crawl Space Drainage
Crawl Space Encapsulation
Crawl Space Insulation
Crawl Space Liner
Crawl Space Moisture Barrier
Crawl Space Moisture Control
Crawl Space Mold Prevention
Crawl Space Sealing
Crawl Space Sump Pump
Crawl Space Vapor Barrier
Crawl Space Ventilation
Crawl Space Waterproofing
Crawl Space Excavation


Basement Remodeling
Basement Remodeling Plans
Basement Renovations
Basement Refinishing
Basement Subfloor
Basement Wall Panels
Thermaldry Basement Flooring
Basement Design
Basement Ideas
Basement Remodeling Ideas
Basement Ceiling Ideas
Basement Floor Plans
Basement Flooring Ideas


Seismic/Earthquake Retrofitting
Before and After Pictures from Underwood
CleanSpace in Underwood, Washington

CleanSpace in Underwood, Washington

Before After
CleanSpace in Underwood, Washington CleanSpace in Underwood, Washington

This crawlspace was a layer of continuous mud and dirt from one side to the other. Our crew came and encapsulated the space and installed a new sump pump to keep the space dry. 

Company Awards
Best of Beaverton Plumbers - 2021
The goal is to connect people with the best local experts. Expertise scored Beaverton Plumbers on more than 25 variables... [Read more]
Ten Years with Home Advisor
Currently an active member of the Homeadvisor network 10 Year anniversary of initial Screening & Approval No homeowner complaints in the last... [Read more]
Elite Service Professional
Have a minimum of five reviews with a 5-star rating Overall customer service rating of 4.5 or better No homeowner complaints in... [Read more]
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Basement Waterproofing & Crawl Space Repair in Underwood, Washington

Do you have water in the basement? Is your crawl space damp? This leads to mold, rot, musty odors, and structural issues. It also leads to a reoccurring headache for you. Luckily, our trained experts are available to permanently fix the problem.

We will properly install a hidden drainage system in your Underwood basement and completely encapsulate your crawl space with CleanSpace vapor barrier. We are here to solve the problem for you.

Why Choose Us?
  • Lifetime Warranty on all Perimeter Waterproofing Systems
  • 25-year Warranty on Crawl Space Encapsulation Systems
  • Sump Pump Installation, Repair & Replacement
  • Basement, Crawl Space & Spray Foam Insulation
  • Basement Egress Windows
  • Flood Vents & Drainage Systems
  • Crawl Space & Basement Dehumidifiers
  • Crawl Space Excavation
  • Hundreds of Satisfied Customers

Basement Remodeling in Underwood, WA

Waterproofing your basement prevents outside water from coming in but what if a pipe bursts or the water heater leaks inside the home. A newly remodeled basement done by your average contractor will mold and rot if there is an internal leak. You'll have to tear out your new basement! We fix this issue.

Our Products Include:
  • Waterproof, washable, insulated walls           
  • Mold-Resistant, No-Sag suspended ceiling
  • Modular carpet, tile & faux wood flooring

  • Energy-efficient, double-paned basement windows
  • Attractive Sunhouse basement window wells
  • French, bifold, louvre & six-paneled steel doors
Unlike the average Underwood contractor we use completely inorganic, waterproof materials. Even if the basement floods your walls and floors will not be damaged by the water. These waterproof products are patented and are built to create an attractive basement that lasts a lifetime.

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Earthquake & Seismic Retrofitting in Underwood

In Underwood, earthquake risk is a reality. That is why it is critical to have your home properly reinforced and prepared for any seismic event. At John's Waterproofing, we provide seismic retrofitting services on your home or business using metal connectors and other reinforcing methods and materials. The goal is to counteract racking, sliding, and overturning, the 3 major earthquake-induced forces that can damage or ruin your structure.

For a FREE no-obligation written estimate in Underwood, WA, please click below and John's Waterproofing will contact you shortly.

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Job Stories From Underwood, WA
Water Crawls Down Driveway and Into Garage - Underwood, WA

This home had an issue with water running down their driveway and creeping into their garage. In an effort to solve this issue the homeowners first updated their old garage door, which was better sealed when it was closed, but then pooling on the outside of the garage door occurred which came in when the door opened. To keep this issue from happening, the homeowners then called up John's Waterproofing. 

To combat this issue our installation crews dug a trench along the exterior near the garage doorway. We then installed a TrenchDrain here to collect the water and grade it along the side of the home and safely out and away from the home's foundation and out via a LawnScape outlet. The garage of This home will now stay dry and healthy. 

Old Vapor Barrier Chewed on by Vermin - Underwood, WA

This home had minor water issues and had a 6 Mil vapor barrier installed a few years prior. Upon recent inspection, the homeowners discovered that the vapor barrier had been chewed through in multiple places, and there were other signs that critters had taken up residency in this crawlspace. To stop this issue before it escalated, the homeowners called in John's Waterproofing.

Our crew began by removing the old and damaged vapor barrier. We then laid down our 20 Mil thick CleanSpace vapor barrier. This is tearing and rip-resistant and comes with a twenty-five-year warranty to back it up. This is sealed along the post footings, and anchored along each wall, to ensure it has a tight seal throughout, keeping both water and critters out. To finish up this project we replaced the vent covers since they show signs of critters chewing them as well. 

Basement Doorway has Flooding - Underwood, WA

This home had a well finished basement. One side of the basement was build into a hillside, and the opposing side had a large doorway that opened up to their backyard. The issue was that the home had a lot of water build up around this exterior doorway when it rained heavily. This water pressure was pushing its way into the basement and the homeowners were worried about the long term damage that their basement would face with this water exposure. To put an end to this, the homeowners called John's Waterproofing. 

Our crew inspected the basement and found no other way for the water to be getting in, it was just the doorway that had some water issues. To combat this we dig a trench in the cement back porch and laid a trench drain to collect the water that had been pooling here. We had a drainage pipe then divert this collected water and taken a safe distance away from the home. This will ensure that the basement can stay dry throughout the seasons. 

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