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TRUSTED BY SUBLIMITY, OR HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon32
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Sublimity

Avatar for Crawlspace Masters, Inc.

Crawlspace Masters, Inc.

4.90(
79
)
•Approved Pro

Crawlspace Masters, Inc.

4.90(
79
)
•Approved Pro
Customers say: Quick response
14 years of experience
Free onsite estimate

Dillon Rivera and Harlan Gross grew up together in the Pacific Northwest and quickly realized that they made a great team in business. The only issue was finding something that combined both of their passions. As the years passed, Dillon climbed the ladder at a restoration company to become the General Manager, while Harlan took interest in masonry and eventually got into a managerial role in his field. Eventually they both realized that they had the skills and drive necessary to go into business together in restoration and the rest is history. Restoration combined those two passions: helping people and creating a great product. They had observed all sorts of service practices from various trades including masonry, construction, remodeling and more. The main lesson they learned is: It's not worth it in the short or long run to not provide superb service to the customer.

"Royal was very polite and kept things clean and worked very hard "

pete b on September 2025

Dillon Rivera and Harlan Gross grew up together in the Pacific Northwest and quickly realized that they made a great team in business. The only issue was finding something that combined both of their passions. As the years passed, Dillon climbed the ladder at a restoration company to become the General Manager, while Harlan took interest in masonry and eventually got into a managerial role in his field. Eventually they both realized that they had the skills and drive necessary to go into business together in restoration and the rest is history. Restoration combined those two passions: helping people and creating a great product. They had observed all sorts of service practices from various trades including masonry, construction, remodeling and more. The main lesson they learned is: It's not worth it in the short or long run to not provide superb service to the customer.

"Royal was very polite and kept things clean and worked very hard "

pete b on September 2025

Avatar for Upfront Construction, LLC

Upfront Construction, LLC

4.94(
27
)
•Approved Pro

Upfront Construction, LLC

4.94(
27
)
•Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

Welcome to Upfront Construction LLC. We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. Give us a call, text or email today, and let us get started!

"I highly recommend Upfront. The work was done in professional and timely manner."

Jim G on August 2023

Welcome to Upfront Construction LLC. We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. Give us a call, text or email today, and let us get started!

"I highly recommend Upfront. The work was done in professional and timely manner."

Jim G on August 2023

Avatar for John's Waterproofing

John's Waterproofing

4.58(
185
)
•Approved Pro

John's Waterproofing

4.58(
185
)
•Approved Pro
Customers say: Super punctual
52 years of experience
Free onsite estimate

Since 1974, John's Waterproofing has been helping the PNW have dry and healthy homes. We specialize in below-grade waterproofing for crawlspaces and basements. In addition to this we also provide radon testing and mitigation, and humidity and mold control. We are proud to offer the best in the industry solutions to your homes waterproofing needs. Cost is determined by the job. CCB#15830 (503) 873-5650 [email protected]

"Chris and Joel were great, they were in and out and our water heater was rewired and sump pump wired in no time at all."

Dawn S on May 2025

Since 1974, John's Waterproofing has been helping the PNW have dry and healthy homes. We specialize in below-grade waterproofing for crawlspaces and basements. In addition to this we also provide radon testing and mitigation, and humidity and mold control. We are proud to offer the best in the industry solutions to your homes waterproofing needs. Cost is determined by the job. CCB#15830 (503) 873-5650 [email protected]

"Chris and Joel were great, they were in and out and our water heater was rewired and sump pump wired in no time at all."

Dawn S on May 2025

Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

5.00(
9
)
•Approved Pro

TerraFirma Foundation Systems

5.00(
9
)
•Approved Pro
Customers say: Quick response
21 years of experience
Free onsite estimate

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"They were great. They had a great communication. They exceeded our expectations."

Rachel Olson K on February 2021

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"They were great. They had a great communication. They exceeded our expectations."

Rachel Olson K on February 2021

Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

4.55(
70
)
•Approved Pro

TerraFirma Foundation Systems

4.55(
70
)
•Approved Pro
Customers say: Quick response
21 years of experience
Free onsite estimate

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"Skyler and TerraFirma far exceeded our expectations. The injection process of the foam raised our cracked garage floor back to level. Skyler’s customer service was the best. I highly recommend TerraFirma and hope that you get Skyler as the person doing the work… you will not be disappointed!"

Larry H on December 2025

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"Skyler and TerraFirma far exceeded our expectations. The injection process of the foam raised our cracked garage floor back to level. Skyler’s customer service was the best. I highly recommend TerraFirma and hope that you get Skyler as the person doing the work… you will not be disappointed!"

Larry H on December 2025

Avatar for John's Waterproofing Co.

John's Waterproofing Co.

4.74(
47
)
•Approved Pro

John's Waterproofing Co.

4.74(
47
)
•Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
52 years of experience

John's Waterproofing Co. is the premier waterproofing company serving in Oregon and southern Washington for almost 4 decades. We Specialize in Basement and Crawlspace Waterproofing and Repairs, we offer free inspections and estimates along with caring customer service. Contact our office today for your waterproofing needs!

"No."

Tracy W on January 2025

John's Waterproofing Co. is the premier waterproofing company serving in Oregon and southern Washington for almost 4 decades. We Specialize in Basement and Crawlspace Waterproofing and Repairs, we offer free inspections and estimates along with caring customer service. Contact our office today for your waterproofing needs!

"No."

Tracy W on January 2025

Avatar for Foundations First Northwest, LLC

Foundations First Northwest, LLC

5.00(
1
)
•Approved Pro

Foundations First Northwest, LLC

5.00(
1
)
•Approved Pro
8 years of experience
Free onsite estimate

Thousands of NW homeowners have trusted Foundations First Northwest to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! Foundations First is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"I contacted Foundations First NorthWest and a couple of other contractors when an inspection revealed some foundation settling and crawl space damage. I chose Foundations First to make the repairs because they included more work, and at a lower price, than their competitors. I can't say enough about how professional everyone at Foundations First NorthWest was, from the first meeting with the sales rep to the constant communication with office staff throughout the project. Every step was completed without a hitch -- getting permits, engineering, the repair work and county inspections. The work crews worked quickly and efficiently on both the installation of stabilizing foundation piers, and also on the crawl space repairs. And they left the work areas in a very clean condition. I highly recommend Foundations First!"

Paul M on May 2025

Thousands of NW homeowners have trusted Foundations First Northwest to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! Foundations First is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"I contacted Foundations First NorthWest and a couple of other contractors when an inspection revealed some foundation settling and crawl space damage. I chose Foundations First to make the repairs because they included more work, and at a lower price, than their competitors. I can't say enough about how professional everyone at Foundations First NorthWest was, from the first meeting with the sales rep to the constant communication with office staff throughout the project. Every step was completed without a hitch -- getting permits, engineering, the repair work and county inspections. The work crews worked quickly and efficiently on both the installation of stabilizing foundation piers, and also on the crawl space repairs. And they left the work areas in a very clean condition. I highly recommend Foundations First!"

Paul M on May 2025

Avatar for American Leak Detection - Oregon

American Leak Detection - Oregon

4.83(
123
)

American Leak Detection - Oregon

4.83(
123
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

American Leak Detection offers the highest level of expertise in the field of leak detection and line locating. We are licensed and bonded in Oregon and Washington. Award winning.

"They showed up right on time and quickly found the source of the problem."

William H on January 2019

American Leak Detection offers the highest level of expertise in the field of leak detection and line locating. We are licensed and bonded in Oregon and Washington. Award winning.

"They showed up right on time and quickly found the source of the problem."

William H on January 2019

Avatar for Lamont Bros.

Lamont Bros.

4.51(
277
)

Lamont Bros.

4.51(
277
)
Customers say: Super punctual
18 years of experience

Lamont Bros. is a company committed to serving the Portland area with the highest quality of remodeling work. From design to completion you will find our dedicated team working with enthusiasm and creatively to create beautiful living spaces.

"The crew did the job in two days! David and Zack were professional and skilled, and the job site was neat and clean when they finished. Matt was personable and easy to work with. In fact, we're looking around for other jobs these guys could do! Highly recommend."

Kassandra K on June 2020

Lamont Bros. is a company committed to serving the Portland area with the highest quality of remodeling work. From design to completion you will find our dedicated team working with enthusiasm and creatively to create beautiful living spaces.

"The crew did the job in two days! David and Zack were professional and skilled, and the job site was neat and clean when they finished. Matt was personable and easy to work with. In fact, we're looking around for other jobs these guys could do! Highly recommend."

Kassandra K on June 2020

WESTERN CONSTRUCTION SYSTEMS

4.85(
26
)

WESTERN CONSTRUCTION SYSTEMS

4.85(
26
)
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

Not a franchise, Family owned and operated since 1987. CCB# 94222, Serving the entire NW. FREE Estimates/ Inspections. Western Construction Systems LLC. is a locally owned, family owned and operated specialty construction company serving the entire north-west. WCS LLC. Prides its self in high quality work which is micro-managed by highly trained crews to ensure the highest level of confidant work. WCS LLC. Has also worked internationally in South America and currently has crews in Haiti. We have worked as far south as El Salvador and as far north as Alaska. We are able to attend to small residential job as well as large industrial projects.

"Western Construction Systems came out and did exceptional work at my house! They went above and beyond my expectations! They were friendly, professional, and hard-working! They took care of all the issues that I had concerns with and then some! Their prices were fair, especially for the high quality of work that they did! I know I pestered them with questions, but they were patient every single time. Before I contacted them to have the work done, I had high anxiety about the drainage issues. When they were finished, I felt confident that there were no more issues. Peace of mind is priceless!"

Robyn S on August 2022

Not a franchise, Family owned and operated since 1987. CCB# 94222, Serving the entire NW. FREE Estimates/ Inspections. Western Construction Systems LLC. is a locally owned, family owned and operated specialty construction company serving the entire north-west. WCS LLC. Prides its self in high quality work which is micro-managed by highly trained crews to ensure the highest level of confidant work. WCS LLC. Has also worked internationally in South America and currently has crews in Haiti. We have worked as far south as El Salvador and as far north as Alaska. We are able to attend to small residential job as well as large industrial projects.

"Western Construction Systems came out and did exceptional work at my house! They went above and beyond my expectations! They were friendly, professional, and hard-working! They took care of all the issues that I had concerns with and then some! Their prices were fair, especially for the high quality of work that they did! I know I pestered them with questions, but they were patient every single time. Before I contacted them to have the work done, I had high anxiety about the drainage issues. When they were finished, I felt confident that there were no more issues. Peace of mind is priceless!"

Robyn S on August 2022

Showing 1-10 of 30

Verified Reviews for Basement Waterproofing pros in Sublimity, OR

*The Angi rating for Basement Waterproofing companies in Sublimity, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Sublimity, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on January 02, 2026

Basement Waterproofing questions, answered by experts

The best type of basement ventilation system depends on your budget, the moisture in your basement’s air, and the types of windows you have down there. You should consider all of these factors when choosing a ventilation system. However, the most effective method for basement ventilation is an energy recovery ventilator (ERV) or a whole-house ventilation system, which preheats or precools incoming air from the outside while also managing water vapor.

Yes, you can over dehumidify your house. While you may prefer a dryer climate inside, the elimination of too much moisture in the air can lead to an extremely dry environment that can affect those with respiratory and skin issues. Strike a balance between eliminating excess moisture without making your home feel like a desert. Most modern thermostats show the humidity levels for guidance.

Physically, the most challenging part of finishing a basement is installing egress windows or doors when the space is below ground level. Mentally, the hardest part may be envisioning the project and planning around load-bearing and mechanical obstacles.

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

A vapor barrier can last over 20 years, but they are vulnerable to pests, flooding, and other natural disasters. If your home weathers a storm or is treated for any pest infestation, make sure to have a drywall pro come check the integrity of your vapor barrier. It’s also important to have a pro install a vapor barrier since improper installation can lead to tears or leaks in the barrier that shorten its lifespan.

The Sublimity, OR homeowners’ guide to basement waterproofing services

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

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