Residential Exterior Drainage Repair Services

While exterior drainage may not be traditionally considered a crawl space service, it significantly impacts your crawl space’s health and integrity. Exterior drainage failures or deficiencies can result in water seepage under or through your home’s foundation, leading to standing water or flooding in the crawl space.

Why Choose Northwest Crawlspace Repair?

  • Expertise: Our team brings years of experience and expertise in exterior drainage repair and installation.
  • Quality Assurance: We use premium materials and employ industry best practices to deliver durable and effective solutions.
  • Customer Satisfaction: Your satisfaction is our priority. We strive to exceed your expectations with reliable service and exceptional results.


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(888) 246-5837

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Fill out this form and we will contact you within 24 hours.

Reasons for Exterior Drainage Problems


The natural shape of your property plays a crucial role in water distribution. Slopes, hills, and valleys determine the flow path of water around your home. Without proper management, a steep slope can channel water towards your foundation, causing flooding in lower areas. Installing a drainage system like a French drain becomes essential to mitigate these risks.

Age of Your System

Over time, exterior drainage systems age and become susceptible to clogs and damage. Drain pipes can accumulate debris or be infiltrated by roots, leading to blockages and drainage failures. Regular maintenance is essential to keep these systems functioning optimally and prevent water intrusion into crawl spaces.

Faulty Installation

Improper installation of exterior drainage pipes can result in significant issues, including flooding in crawl spaces. Misplaced drain pipes or negative elevation can cause water backflow, leading to water infiltration. Professional installation by experienced contractors is crucial to avoid such mishaps.

Lack of City Infrastructure

In some areas, the absence of proper storm drains exacerbates drainage problems. Without adequate city infrastructure, residents contend with flooding and saturated ground during heavy rainfall. Implementing effective exterior drainage solutions becomes imperative to address these issues.

Exterior Drainage Services We Provide

French Drain Installation

Our French drain systems utilize perforated pipes to redirect water away from problem areas. By employing gravity, water is channeled to designated drainage points, such as streets or catch basins, preventing water accumulation around your home's foundation.

Foundation Drain Replacement

Foundation drains are crucial for preventing basement or crawl space flooding. Over time, these systems can fail, leading to water penetration. We offer professional replacement services to ensure your basement or crawl space remains dry and protected.

Gutter Downspout Drains

Proper downspout drainage is essential for diverting water away from your home's foundation. We provide installation, inspection, and repair services for gutter downspout drains to maintain efficient water management around your property.

Catch Basin and Sump Pump systems

For properties with challenging topography, we offer catch basin and sump pump solutions to collect and remove excess water. Our systems efficiently channel water away from your home, mitigating the risk of flooding and water damage.


Northwest Crawl Space Services is family-owned right here in the Pacific Northwest. With years of experience, we’re licensed and bonded and always prioritize our customer’s satisfaction. Please read some of our 5-star reviews from our happy customers.

Myong Soo Kim
Myong Soo Kim
9 March 2023
Exceed their promises..excellent communication and great crew. Highly recommend.
Thomas Roberts
Thomas Roberts
9 March 2023
Rob and crew from NW Crawl Space did full remediation for our crawl space and attic, after finding evidence of rodents (mice) in both areas. Removed old crawl space insulation & vapor barrier, replaced heat-ducts that were damaged, & vacuumed out attic insulation and debris. Sealed openings in both areas to prevent rodents from returning. Traps set, with rodent control plan. Highly recommended!
Emily Davis
Emily Davis
3 March 2023
Northwest Crawl Space Services has been honest, professional, easy to work with, and has done excellent work on my home. I first approached the company looking for someone to reinsulate and clean out my mud room crawlspace-- it is an addition to the house and is open-air. Lior came by and noted that because NWCSS specializes in fiberglass insulation, they wouldn't be able to work on this part of my house, because it would require spray foam insulation to truly be rat and weather proofed. I really appreciated this up front honesty-- two previous contractors had given me bids to reinsulate with fiberglass, never mentioning the need for spray foam, and never saying that they wouldn't be able to do a proper job. I would have paid money to some other company for a shoddy, inappropriate "solution" if Lior had not filled me in. Lior even recommended some other companies to call that specialize in spray foam! After this helpful and informative experience, I knew right away when I discovered signs of rats in my main basement crawlspace that I wanted NWCSS to be the ones to work on the problem. Lior came by to check it out and did a very thorough inspection. His manner with clients is excellent-- I never felt like my questions were being dismissed. We set a date for a crew to come by to replace rat-infested insulation, remove the improperly installed vapor barrier, clean out debris, and reinstall vapor barrier to industry standards. The crew, Patrick and Chandler, were friendly, polite, and happy to answer questions. Savannah in the office has also been very friendly and quick to answer my questions regarding logistics and payment. Overall, my experience was excellent and I will re-hire NWCSS when it comes time to reinsulate and clean out my attic crawlspace.
jan ostrovsky
jan ostrovsky
6 February 2023
Matan gave us a fair estimate for the crawl space re-insulation and screening, and the work was done promptly. I was pleasantly surprised when the final bill came in about 15% UNDER the estimate. It’s nice to deal with a company which has the integrity to pass those savings on.
Dan Huang
Dan Huang
26 January 2023
Northwest Crawl Space is a trustful company to work with. They helped me install the French drain, replace the insulation and vapor barrier. Matan and his stuff did a great job. They will carefully protect your home when performing the job, clean the waste after the work is done, and come back to inspect if the work is good.
Scott Taylor
Scott Taylor
17 December 2022
We had Northwest crawlspace come out to inspect our crawlspace and they identify a lot of standing water as well as rodent activity in the insulation. As a result, we needed a full clean out of our crawlspace and new insulation, vapor barrier, drain and sump pump. The crew was professional, friendly and fast. The work was extremely well done, we recently had them come out to check everything and the technician confirmed it was one of the best installs he had seen. I would highly recommend this company to anyone.
Ricardo Salvatierra
Ricardo Salvatierra
16 December 2022
My experience with this company has been amazing. Lior (the owner) goes above and beyon every single aspect, super professional and always providing the best advice to avoid unnecessary expenses. They did the whole work in my crawlspace, sump pump, french drain, vapor barrier, etc... and results are great, 0 moisture. I would definitely recommend it.
Torrey Olsen
Torrey Olsen
15 December 2022
Lior and his NW Crawl Space Services team were everything we expected in professionals! They were on time, neat, though, communicative, polite, did the job as promised and then checked back with us as promised again to ensure that the job was done!
Wayne Appler
Wayne Appler
18 November 2022
I had Northwest Crawl Space Services remove all my rodent infested insulation and vapor barrier. They cleaned & disinfected my crawl and installed all new insulation and a sealed vapor barrier. The workers were very diligent and and skilled in their methods. I was given a quote up front and feel that I received a quality job that was worth every penny. I am beyond pleased with the company and would highly recommend them to everyone.

Frequently asked questions

Why is proper exterior drainage important for my home?

Proper exterior drainage is essential for preventing water damage to your home’s foundation, basement, and crawl space. It helps to divert rainwater away from your property, reducing the risk of moisture-related issues such as mold, mildew, and structural damage.

Signs of poor exterior drainage include pooling water around the foundation, water stains on basement walls, cracks in the foundation, and damp or musty odors in crawl spaces or basements. If you notice any of these signs, it’s essential to address the drainage issues promptly.

Common causes of exterior drainage problems include improper grading, clogged or damaged gutters and downspouts, inadequate drainage systems, and soil erosion. Identifying the specific cause is crucial for implementing effective repair solutions.

Our experienced technicians conduct a thorough inspection of your property to identify drainage problems accurately. This may include evaluating the grading, inspecting gutters and downspouts, and assessing the condition of existing drainage systems.

We offer a range of repair solutions tailored to address specific drainage problems. These may include grading and landscaping adjustments, gutter and downspout repair or replacement, installation of French drains or surface drainage systems, and foundation waterproofing.

The duration of exterior drainage repairs depends on the extent of the problem and the chosen repair solutions. Our team works efficiently to minimize disruption to your daily routine and complete the repairs in a timely manner.

Yes, addressing exterior drainage problems can enhance your home’s curb appeal and resale value. Potential buyers are more likely to be attracted to a property with effective drainage systems in place, as it signals proper maintenance and protection against water damage.

While minor drainage issues such as cleaning gutters or adjusting downspouts can be DIY projects, it’s advisable to consult with professionals for more complex problems. Attempting DIY repairs without proper expertise and equipment could worsen the issue or lead to further damage.

To schedule an inspection or request a quote for residential exterior drainage repair, please contact our team at (888) 246-5837. We’ll be happy to assess your drainage issues and recommend the best solutions for your home.

Get Your Free Quote

Fill out this form and we will contact you within 24 hours.