Washington

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Interior Drainage System Installation in Washington

Keep Water Out with Proven Basement Solutions

Our interior drainage systems capture and redirect water before it damages your basement. Designed for long-term protection, they stop leaks, prevent mold, and keep your home dry year-round.

Redirecting Water Before It Damages Your Basement

What Is an Interior Drainage System?

An interior drainage system is one of the most effective ways to control basement water. Installed along the inside perimeter of your basement floor, it collects water that seeps in through the walls or floor joints and channels it directly to your sump pump.

This stops water from pooling, reduces pressure on the foundation, and helps maintain a dry, usable basement. Interior drainage is often preferred because it can be installed year-round, doesn’t disturb landscaping, and integrates seamlessly with other waterproofing measures.

Common Signs You Need This Service:

Persistent puddles or damp spots on the basement floor after rain

Musty or damp odors that linger despite cleaning

Efflorescence (white, chalky deposits) along basement walls or floors

Mold growth on furniture, drywall, or storage boxes kept in the basement

Water seeping in at the cove joint (where walls meet floors)

Efficient, Low-Impact Solutions for a Dry Basement

Our Interior Drainage Installation Process

Installing an interior drainage system is one of the least disruptive yet most effective waterproofing methods. Our crew works from inside the basement, which means no digging up your landscaping or driveway.

We cut a narrow trench along the basement perimeter, install perforated piping, and direct water into a sump pump that safely removes it from the home. Once complete, the trench is resealed with concrete for a clean, finished look.

Repair process:

  1. Inspection & Planning Identify leak points and design a custom drainage route.
  2. Perimeter Trench Creation Carefully cut and remove a strip of concrete near the walls.
  3. Drain Tile Installation Place perforated piping with gravel backfill to collect water.
  4. Sump Pump Integration Connect the drainage line to a sump pump system.
  5. Concrete Restoration Reseal the trench with fresh concrete for a seamless finish.
  6. Final Testing Ensure proper water flow and system functionality.

Everything You Need to Know About Basement Drainage

Interior Drainage FAQs

How does an interior drainage system work?

It collects water seeping through basement walls and floors into a hidden trench, then channels it to a sump pump that safely discharges it away from the home.

Is it better than exterior drainage?

Interior systems are often less expensive, faster to install, and require no excavation. They’re especially effective for finished basements.

Will I need to replace my flooring?

In most cases, flooring along the basement perimeter is temporarily removed and then reinstalled or replaced, depending on condition.

Does interior drainage require maintenance?

Yes – sump pumps should be inspected annually to ensure proper function.

How long will an interior drainage system last?

With proper installation and routine sump pump maintenance, interior drainage systems can last for decades without issues.

Can interior drainage help prevent foundation cracks?

Yes. By reducing hydrostatic pressure around basement walls, these systems minimize stress that causes cracking and structural movement.

Will installing interior drainage affect basement finishing plans?

No. Systems are designed to sit below the floor slab and are easily integrated before finishing or remodeling your basement.

Still Have Questions About Interior Drainage?

Can’t find the answer you’re looking for? Our experts are here to help explain your options and recommend the right solution for your home.

Trusted by Homeowners Across Washington

Real People. Real Results.

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Birte Nielsen
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Great service; fast and efficient. R&R lifted our sinking driveway today and did a great job. The tech, Austin, was very easy to work with and kept us informed about the process. We would highly recommend this service should the need arise.
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John Strohschein
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R and R foundation specialist were great! Cody, Diego, and team did a professional and thorough job, from installing the helical piles to final cleanup. They were very communicative, friendly, and answered all of my questions. Would recommend them for any future foundation stabilization jobs
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Paula Christiansen
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In October of 2025, we signed with R&R for the stabilization of our foundation. Jordan Ortega took full measurements of the necessary levels in our home, listened carefully to our desires and concerns, explained what we could expect, and worked with me via email to adjust the contract to the level of clarity that we needed. R&R handled the permitting with King County and the City of Kirkland, and in February work began. The team leader, Kyle, was excellent about communicating what he planned to have happen when; and when things didn't go according to plan, he was prompt about communicating what had happened and what the new plan was.
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Todd Humphrey
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R and R was great! The salesman was not a salesman but someone who looked at our issue and made recommendations that made sense. He did not try to sell us something we did not need or ask for. The crew was on time, thoughtful, respectful and did a great job. They finished on time with no issues, and cleaned up after the job was complete. A very professional company I would highly recommend that you at least give them a chance. My wife and I are glad we did.
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Dana Smith
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Update 4/12/26 The company reached out to us, came to our home and made a plan to properly lift our house. The work was done in a timely manner and we had a much better experience with them this time around. We are very happy with how things turned out. Awful company. We paid over $38,000 to raise our foundation 1.5”. It started cracking and they were unable to do what they said they could. They “stabilized “ it and left with our savings. It was the biggest waste of money and I suggest you go elsewhere. Garbage. Our house feels like it’s sinking more.
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Longitude 120 Engineering & Design
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If you need foundation repair, R&R Foundation Specialist should be your first call. Their team is one of the most reliable and professional that we have had the privilege to work with in the industry. We regularly refer clients to Cory and his extremely hard working and well trained staff, for all foundation repair, retrofit, lifts /stabilization needs.
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Kirsten Burt
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So I had some work done by r and r back in 2019. I had six piers put in and really enjoyed Corey the owner… fast forward to 2026 and the other part of my house started having weird sounds and a crack in my ceiling… I live on a hillside and tons of water comes my way and a user error with a downspout may have caused more issues… I made an appointment to have him come Out and do an inspection with a bid…. It’s pretty rare these days to not feel like you have gotten taken… Cory did all the measurements and well it appears the house is just settling. The house was built in 1980 by the original owners and was definitely not built straight. Anyway… Cory literally put me at ease and said. “Let’s just keep these measurements and check them out in a year or so. “He could have easily have just said… “yup. You need six piers….” He didn’t. I highly recommend r and r foundation… thanks for being honest… it goes a long way! Also… when I do need the work done… I, of course, will be using them!

Affordable Protection Without Delay

Financing Options for Interior Drainage Systems

Don’t let basement leaks cause long-term damage. With our flexible financing plans, you can install an interior drainage system right away and pay over time.

Financing Benefits:

  • Quick and simple application process
  • Low monthly payment options
  • Plans available for all credit types
  • No need to wait to protect your home

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