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Products & Services
Basement Waterproofing
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


Crawl Space Repair
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 Finishing
Basement Finishing Ideas
Basement Finishing Plans
Basement Finishing Systems
Basement Flooring Systems
Basement Wall Finishing


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 Finishing Ideas
Basement Floor Plans
Basement Flooring Ideas


Seismic/Earthquake Retrofitting
Before and After Pictures from Lake Oswego
Unstable foundation repaired with Smart Jacks

Unstable foundation repaired with Smart Jacks

Before After
Unstable foundation repaired with Smart Jacks Unstable foundation repaired with Smart Jacks

Parts of this foundation were in dire need of help and reinforcements. Our team went in and replaced many of these below standard posts with our patented Smart Jacks, guaranteed to never rust and create an unsafe foundation. They also include a superb warranty. 

Servicing a Sump Pump in Lake Oswego, OR

Servicing a Sump Pump in Lake Oswego, OR

Before After
Servicing a Sump Pump in Lake Oswego, OR Servicing a Sump Pump in Lake Oswego, OR

When we come out to do an annual service, we will make sure that your pump is cleaned up, free of debris and running smoothly. Here is what this pump looked like before and after our service tech Andrew cleaned it up. 

Cleaning a Sump Pump in Lake Oswego, OR

Cleaning a Sump Pump in Lake Oswego, OR

Before After
Cleaning a Sump Pump in Lake Oswego, OR Cleaning a Sump Pump in Lake Oswego, OR

When we come out to do an annual service, we will make sure that your pump is cleaned up, free of debris and running smoothly. Here is what this pump looked like before and after our service tech Andrew cleaned it up. 

Company Awards
Innovation and Excellence Award
We just got this email! We have now reviewed all of the information on the companies and individuals taking part... [Read more]
2019 Build Awards- Outstanding Service in Waterproofing
We are delighted to announce that John's Waterproofing Company are recipients within the 2019 BUILD Awards! Build Magazine's first program... [Read more]
The 2017 Impact Award
We received the Impact award this year (2017) at the annual basement system dealer’s convention. This award means so much... [Read more]
More Awards

Your Proven Lake Oswego, OR Basement Finishing & Waterproofing Experts

Please tell the powers that be that Manuel  G's crew was amazing. They were all very courteous and hard working....
Happy Customers Surrounding Lake Oswego, OR
Work Requests

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Reviews From Lake Oswego
Testimonials From Lake Oswego
I have been a customer for over 10 years and have always received great service and quality products.
Testimonial by Tom A. from Lake Oswego, OR
We highly recommend this company for the tough job of removing water from crawl spaces. John's employees are thorough, careful, respectful and clean.
Testimonial by Bonnie C. from Lake Oswego, OR
I believe this is a viable, affordable solution and was explained very well.
Testimonial by Tyler J. from Portland, OR

Basement Waterproofing & Crawl Space Repair in Lake Oswego, Oregon

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 Lake Oswego 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 Finishing & Remodeling in Lake Oswego, OR

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 finished 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 Lake Oswego 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 finished basement that lasts a lifetime.

Earthquake & Seismic Retrofitting in Lake Oswego

In Lake Oswego, 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 Lake Oswego, OR, please click below and John's Waterproofing will contact you shortly.

Press Releases From Lake Oswego
Job Stories From Lake Oswego, OR
Wet and moldy Crawlspace in Lake Oswego, OR

This customer called with concerns for their crawl space continuously being wet even with the sump pump they made. The foundation was leaking water and the fiberglass insulation was absorbing all the moisture causing mold and sagging. The homeowner called us for a free inspection to help relieve some of these issues. 

When our inspector went out he found mold under the fiberglass insulation, and one some areas of the foundation. The soil was mud and the old black plastic vapor barrier was torn and puddled with water. Continuously exposing your crawlspace to these conditions takes a toll on your foundation and the air quality of your home. Our inspector recommended a crawl space encapsulation system to keep the water, moisture, and mold out of the crawl space for good. 

Our crew went in and did a complete dry out first to remove all the moisture and dampness out. After the crawl space was dried they treated the mold with a product we use called Mold X. It kills the mold and removes the mold stains from the wood. Once we had the mold and moisture taken care of we put in a drainage system with our TripleSafe sump pump. It is a three-level pump the will run depending on the volume of water that is flowing in. When doing an encapsulation we use our CleanSpace vapor barrier, it is a 20 mils thick woven fiber barrier that is rip-resistant. To make sure your crawl space is completely sealed we put the vapor barrier all the way up to the sill plate of the home along with running the barrier under your posts and piers. Once the crawl space is encapsulated we installed our SaniDry XP dehumidifier that will filter out moisture, mold spores, and other allergens. Leaving your home with cleaner air and preventing moisture and mold from the crawl space. Lastly, our after everything is in place and set our crew uses a spray foam insulation around the parameter of the crawlspace. Completely encapsulating the space and leaving you with a dry and healthy crawl space. 

The homeowner was so thrilled to have such a burden lifted and know that the foundation of her home was protected. She couldn't believe the transformation of the crawl space and it was the same space. 

Musty Crawlspace

This customer called because he had a musty smell in his house that he couldn't get to go away. Upon further investigating that smell he started to wonder if it was coming from beneath his house. So he gave us a call to have one of our inspectors come out and take a look at what was going on. Our inspector found sagging old fiberglass insulation with a torn vapor barrier. Water and debris had been getting in the crawlspace causing mud, dirt, and moisture damage to the posts and beams. Causing a musty smell to move up thru the house. We recommended doing a crawlspace encapsulation to prevent future water problems from happening. We cleaned out the crawlspace and sealed the vents, the crew then laid down our terra block that is a foam insulation that is 3/4" foam underneath the cleanspace that completely seals in the crawlspace. Along with the cleanspace we installed our smart sump pump that is specifically made for the crawlspace. This customer was so happy to know he doesn't have to worry about musty smells or breathing in poor air from his crawlspace. He can relax knowing he has a dry crawlspace for years to come. 

Waterguard in Lake Oswego, OR Basement

This homeowner had heard of John's Waterproofing before and was interested in the basement waterproofing systems that we have to offer. They also had some concern over the excess water in their basement. Our inspector, Travis inspected their basement and recommended installing Thermal Dry walls, our patented Waterguard perimeter drain, and a Super Sump pump.

Sheryl happily agreed, so Delfino and his team quickly began working to waterproof the basement. They first installed Thermal Dry walls, a flexible material that is installed over the basement walls. It is designed to reflect heat back into the basement space, improving comfort and energy efficiency. Thermal Dry walls work perfectly with the Waterguard perimeter drain by directing wall seepage into the drain. Waterguard is installed in the footing of the basement and collects the walls and floor seepage. It then channels the water into the Super Sump pump. The Super Sump pump runs smoothly and quietly to pump out all water from the basement. 

Not that our systems are in place, Sheryl is glad that she no longer has excess water in her basement and can enjoy a new, usable space.

Waterguard in Lake Oswego, OR Basement - Photo 1Waterguard in Lake Oswego, OR Basement - Photo 2
Work Requests From Lake Oswego, OR
Vicinity of Bonniebrae Drive in Lake Oswego
We purchased our Red Fox Hills condo in 2017 as a second home and at the time were told of "dry rot" on posts and water in the crawl space. Now time to address. Concerned that maybe we have an inside leak...or possibly natural spring leakage. We are part-time and will be back in Lake Oswego in late June. Would it be possible to schedule an inspection/estimate? Would Tuesday June 25 at Noon be OK? Please let me know. Thanks Edward Hayman Cell 1-847-736-0668 or LO Tel 503-303-4896
Vicinity of in Lake Oswego
Water seeping from below cement floor in basement.
Vicinity of Jean Rd. in Lake Oswego
We have a basic sump pump that is located in our crawl space and is no longer working (the breaker in the breaker panel is tripped and can not be reset). I need pricing for someone getting in the crawl space and replace the sump pump
Vicinity of Country Commons in Lake Oswego
Do you repair/seal efflorescence in concrete foundations of homes built around 1923?
Vicinity of Lakeridge Drive in Lake Oswego
Crawl space moisture barrier
Vicinity of Boone's Ferry Road in Lake Oswego
Need vapor barrier install in crawl space
Vicinity of Tracy Ave in Lake Oswego
Crawl space cleanup and vapor encapsulation. We're in the process of correcting a floor say but found the crawl space in general needs to be addressed. Recent rodent damage, and need insulation replaced.
Vicinity of Windsor Ct in Lake Oswego
Have had water in crawl space in the past and want to prevent it in the future.
Vicinity of Lake Haven Drive in Lake Oswego
We have standing water in our crawl space and would like to not have standing water in said crawl space.
Vicinity of in Lake Oswego
We have replaced our sump pump twice now in the last three years and I am looking for lunch my-term solutions to keep our basement dry
Vicinity of Kenny St in Lake Oswego
We have confirmed termite damage under the house and would like to have a repair recommendation and cost assessment. It is a house recently purchased.
Vicinity of Middlecrest Rd in Lake Oswego
Need injections in a few holes in concrete basement wall.
Vicinity of Iron Mountain Rd in Lake Oswego
Basement/family run water damage from outside
Vicinity of LakeView Blvd in Lake Oswego
Need an outside clogged drain looked at which I believe is causing leakage in our basement.
Vicinity of Worthington St in Lake Oswego
Water in the basement
Vicinity of Orchard Springs Rd in Lake Oswego
House is situated on non-drying clay, hardwood floors have cupped, have concern about radon as well
Vicinity of Chapin Way in Lake Oswego
Good Evening, We've had two leaks coming from our crawl space into daylight living area and can't determine the source. I'd like a quote to fix the issue. When can you come out? Thank you, -Rich 503-881-2806
Vicinity of Devon Lane in Lake Oswego
The building has a gravity drainage system which includes French drains around the foundation. Water is directed into a sump well in the crawl space before being pumped up to a sewer line. The crawl space has a vapor barrier but is not encapsulated. The sump pump suffers from sediment buildup and seizes regularly, leaving standing water. I may have some mold forming. A radon test was performed in May with an average reading of 0.3 pCi/L. There is a musty smell and I'm concerned about air quality. Forced air furnace is in crawl space. Most supply ducts are insulated, returns are not. I'm planning to install cooling next year and would like to prepare the space as needed. I'm interested in suggestions and an estimate for the work, please. Thanks for your time and help. /bh
Vicinity of Roosevelt Ave. in Lake Oswego
We would like to get an estimate for removal of dry rot of the sill plate in our crawlspace and also some dry rot on a window and siding. Would also like to know how far your booking out to do the work. Thanks.
Vicinity of Glacier Lily St in Lake Oswego
I have a client in Lake Oswego that is selling their home and the inspection found that several crawlspace vertical beams are defective. We need to get them repaired.
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