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TRUSTED BY CORNELIUS, OR HOMEOWNERS

  • Average homeowner rating star icon4.2
    Average homeowner rating
  • Verified reviews icon66
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Cornelius

Avatar for John's Waterproofing
John's Waterproofing
4.3(
252
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Cornelius, OR and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"From the first visit to my home from Sean for an estimate, to the crew that arrived to do the project I was impressed. Everyone was extremely professional. The crew arrived on time, the crew leader introduced me to the rest of the crew and explained how they would proceed with the project. They protected the work spaces with plastic from my garage to the crawl space opening in side my closet. They went to work and kept me informed about the progress. The whole crew worked very efficiently and got the project done in one day. They left work area spotless when they were done. I would highly recommend this company for any waterproofing project!!"
Trim around fireplace was removed and mold found along the base
Fiberglass was drooping away from the home, removing its insulation value
Fiberglass Insulation was falling down in clumps from water weight
This window had been upgraded and given trim to give a clean and finished look
Re removed the below-grade sections of the wall and waterproofed with ThermalDry Radiant vapor barrier and installed a drain system around the interior perimeter

+41

Response time9 hrs
Response rate100%
21 neighbors recently requested a quote
Avatar for Better Basements and Waterproofing
Better Basements and Waterproofing
5.0(
10
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Cornelius, OR and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"Dylan Milroy went in and cleaned out the crawlspace put down plastic and dug a french drain and redirected all the downspouts so that the rain and we had now more water being drained. He is super easy to work honest he follows up to see if you are satisfied with his work.. I recommend him to everyone."
12mil vapor barrier
12mil vapor barrier
Standard Vapor Barrier
Exterior Drainage
Exterior Drainage

+3

2 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for John's Waterproofing Co.
John's Waterproofing Co.
4.0(
71
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Cornelius, OR and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"Friends who know what our basement looked like before are flabbergasted. The information they send you after you contact them is super educational and everyone was prompt, polite, and professional. Wish we'd done this sooner."
Encapsulation System
Before Encapsulation
Before Interior Drain System
After Interior Drain System
Finished basement

+38

Response time6 hrs
216 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Pacific Waterproofing & Foundation Solutions, LLC
Pacific Waterproofing & Foundation Solutions, LLC
4.9(
8
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Cornelius, OR and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"Very impressed with Darren: his work ethic, thoroughness of the work, cleanliness of the job site when the job was finished. He arrived when he said he would and stopped by when he was done for the day to let me know he was leaving. I certainly would recommend Pacific Waterproofing, LLC."
Response time2 days
8 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Legacy Plumbing and Excavation, LLC
Legacy Plumbing and Excavation, LLC
4.5(
75
)
Basement Drainage Channels - Install

Serving Cornelius, OR and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"James from Legacy Plumbing and Escavation was professional and friendly did an a awesome job in a timely manner in repairing a leaky shower in a home we had just purchased. Highly reccomend James and Legacy Plumbing and Escavation 🤙"
Sewer Repair
Excavation & Sewer
Response time9 hrs
Response rate95%
719 neighbors recently requested a quote
Avatar for 3 Mountains Plumbing
3 Mountains Plumbing
4.2(
648
)
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Cornelius, OR and surrounding areas

Approved

In business since 2000

Emergency services offered

Warranties offered

"Highly recommend! They called when they said they would and showed up when they said they would and finished the project when they said they would. Very friendly and helpful staff all the way around from the dispatchers, Nicole & Michelle, to the Journeymen Tristan and Travis. I have nothing but good things to say about them."
The 3MP Team (Circa 2017)
Bill Kerrigan
Alex Grabbing a Photo
Rolling Through Lake Oswego
Random Patch Photo

+103

Response time1 day
Recommended by92%of homeowners
Avatar for RBP Construction LLC
RBP Construction LLC
4.6(
9
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Cornelius, OR and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

RBP Construction was founded by Ruben Bautista, his son Brandon, and their loving dog! Rambo. With over 20 years of experience in the industry, Ruben always dreamed of owning his own business. \nI always dreamed of building something that is s my own. Since leaving my homeland of Veracruz, Mexico my aspiration and vision have been to build and build, we all have the capacity to create and grow something for ourselves and our families. We are proud of what we are doing, even through the tough times, we have an end goal in mind.\n\nRuben prides himself and his team in offering quality services in both residential and commercial construction. From excavations to concrete, and siding services, RBP Construction is your premier contractor in Oregon and Washington. No construction project is too big or too small! We have the knowledge, equipment, and capacity to make your building dreams come true. \n

RBP Construction LLC
RBP Construction LLC
RBP Construction LLC
RBP Construction LLC
Framing

+5

9 neighbors recently requested a quote
Recommended by33%of homeowners
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Basement Waterproofing questions, answered by experts

French drains and yard grading systems are two highly effective ways to fix standing water around the foundation. Since the French drain uses a perforated pipe covered by gravel, you won’t have to worry about water taking the soil away from your foundation. Meanwhile, yard grading levels out the ground to prevent water from gathering around your foundation.

External pressure on the basement wall can cause it to bow inward. Soil, heavy with water saturation, is commonly the main culprit. The soil exerts immense pressure on the wall, causing it to fail, at least partially. This is known as hydrostatic pressure—these situations can occur after rainfall or simply due to regular groundwater presence and may be temporary or more permanent.  

Damp proofing and waterproofing are both methods to help keep your basement dry. Damp proofing keeps soil moisture from entering your basement, which is helpful since your basement is underground. Waterproofing, however, keeps both soil moisture and liquid water out of the basement, which is essential, especially if you live in a wet environment. Because it’s more protective, waterproofing typically costs more than damp proofing.

To maintain an outdoor structure, perform regular inspections for damage, leaks, and weak joints. Clean the structure regularly, treat or repaint wood surfaces for weather resistance, and reinforce any weak joints to prevent deterioration and ensure its longevity.

Costs depend on the area's size and condition, damage extent, and chosen method. A professional evaluation provides a tailored estimate based on specific needs.

The Cornelius, OR homeowners’ guide to basement waterproofing services

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