St. Louis Waterproofing, Insulation, & Foundation Repair

Water and air leaks lead to costly structural damage and unhealthy living conditions. We repair foundations, stop leaks, and insulate homes so you can feel confident your home is healthy, protected, and built to last.

Get a Free Inspection

Photo of a home owner greeting a waterproofing inspector at the door

"We had water problems in our basement. Andrew was willing to not only answer our call, but offered to walk us through it via video call. He then went above and beyond and offered solutions as well as a written report that explained everything."

Samantha M.

O'Fallon, MO

Waterproofing

Have confidence that water won't ruin your home and everything in it.

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Insulation

Insulate your home efficiently so you stop wasting money on energy bills.

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Foundation Repair

Restore your cracked or broken foundation to prevent further damage to your home.

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The Risk

Don't risk your biggest investment

Water can destroy your home and everything in it. Poor insulation always makes your home uncomfortable.

Foundation problems gradually destroy your home.

Bad insulation wastes your money on energy bills.

Unreliable contractors offer fixes that don't last.

Get Help

The Guarantee

We protect your home the right way

You learn the real problem

Anyone can offer to fix a crack without knowing the underlying cause. We find the true problem so that your money isn't wasted.

You get the right fix

We don't just fix cracks; we create a solution system that addresses the root of the issue so that you don't call us back.

You're left with a clean home

When we work on your home we treat it carefully. And when we're done, your basement or attic will look cleaner than before.

Airtight Results

Our affordable experts have been fixing St. Louis homes and businesses for generations.

70,000+

Successful Jobs

70+

Years in Business

4.9

Review Rating

350+

Google Reviews

Get Our Free Foundation Crack Guide

Worried about a crack in your basement? Download our free guide to see how big of a problem you might be dealing with.

How it Works

The Process

Dealing with a wet basement can be overwhelming. But we've taken the mess out of it.

Contact us

Our inspectors will develop a custom plan along with a free estimate.

Property repair

Our certified repair crews will fix your broken foundation or insulation.

Enjoy your home again

Rest easy knowing you are covered by our craftsmanship warranty.

Schedule Online

Reviews

Customer Testimonials

We think we're good at waterproofing, but don't take our word for it. Listen to what our customers have to say!

Greg Dunn and Quality Waterproofing were very responsive when we had a sump pump problem. They were able to get a tech here even with the high workload after a storm, spotted the problem, and got it fixed quickly.
Ted W.
Villa Ridge, MO
I have trusted Quality Waterproofing with many home projects and they have never failed me! Andrew Timp and the service team are amazing! Will continue referring them as well as using them for my own projects!
Jade P.
St. Louis, MO
Quality Waterproofing is a company of integrity. They focus on “going the extra mile” to see that their customers receive exactly what’s needed at reasonable cost. They don’t oversell. In fact they will counsel you to follow the most prudent approach.
Randall K.
St. Louis, MO
They were amazing! They found a plumbing problem that could be the water issue. Rather than recommending expensive work off the bat like another company I contacted, they recommended I fix the plumbing issue first and see if I still had the problem. Fantastic.
Kari L.
St. Louis, MO
We had four leaking cracks in our basement repaired and we’re very happy with the service received. All of the employees were very kind and professional. The repairs were done quickly and no messes were left! Highly recommend!
Jessica H.
Pacific, MO
They didn’t try to sell on anything unreasonable and even recommended alternative solutions as to not run my bank dry. Will be calling for any and all related issues in the future.
Ali K.
St. Louis, MO
Eric Wulff is the most honest and pleasant person I have invited into my home to give me a bid on a job.
Donnie H.
St. Louis, MO

Read All Reviews

Reviews

Customer Testimonials

We think we're good at waterproofing, but don't take our word for it. Listen to what our customers have to say!

Greg Dunn and Quality Waterproofing were very responsive when we had a sump pump problem. They were able to get a tech here even with the high workload after a storm, spotted the problem, and got it fixed quickly.
Ted W.
Villa Ridge, MO
I have trusted Quality Waterproofing with many home projects and they have never failed me! Andrew Timp and the service team are amazing! Will continue referring them as well as using them for my own projects!
Jade P.
St. Louis, MO
Quality Waterproofing is a company of integrity. They focus on “going the extra mile” to see that their customers receive exactly what’s needed at reasonable cost. They don’t oversell. In fact they will counsel you to follow the most prudent approach.
Randall K.
St. Louis, MO
They were amazing! They found a plumbing problem that could be the water issue. Rather than recommending expensive work off the bat like another company I contacted, they recommended I fix the plumbing issue first and see if I still had the problem. Fantastic.
Kari L.
St. Louis, MO
We had four leaking cracks in our basement repaired and we’re very happy with the service received. All of the employees were very kind and professional. The repairs were done quickly and no messes were left! Highly recommend!
Jessica H.
Pacific, MO
They didn’t try to sell on anything unreasonable and even recommended alternative solutions as to not run my bank dry. Will be calling for any and all related issues in the future.
Ali K.
St. Louis, MO
Eric Wulff is the most honest and pleasant person I have invited into my home to give me a bid on a job.
Donnie H.
St. Louis, MO

Read All Reviews

Reviews

Customer Testimonials

We think we're good at waterproofing, but don't take our word for it. Listen to what our customers have to say!

Greg Dunn and Quality Waterproofing were very responsive when we had a sump pump problem. They were able to get a tech here even with the high workload after a storm, spotted the problem, and got it fixed quickly.
Ted W.
Villa Ridge, MO
I have trusted Quality Waterproofing with many home projects and they have never failed me! Andrew Timp and the service team are amazing! Will continue referring them as well as using them for my own projects!
Jade P.
St. Louis, MO
Quality Waterproofing is a company of integrity. They focus on “going the extra mile” to see that their customers receive exactly what’s needed at reasonable cost. They don’t oversell. In fact they will counsel you to follow the most prudent approach.
Randall K.
St. Louis, MO
They were amazing! They found a plumbing problem that could be the water issue. Rather than recommending expensive work off the bat like another company I contacted, they recommended I fix the plumbing issue first and see if I still had the problem. Fantastic.
Kari L.
St. Louis, MO
We had four leaking cracks in our basement repaired and we’re very happy with the service received. All of the employees were very kind and professional. The repairs were done quickly and no messes were left! Highly recommend!
Jessica H.
Pacific, MO
They didn’t try to sell on anything unreasonable and even recommended alternative solutions as to not run my bank dry. Will be calling for any and all related issues in the future.
Ali K.
St. Louis, MO
Eric Wulff is the most honest and pleasant person I have invited into my home to give me a bid on a job.
Donnie H.
St. Louis, MO

Read All Reviews

Videos & Articles

Waterproofing & Insulation Knowledge Base

Learn how to guard your home against water and structural damage.

A Quality Waterproofing + Insulation expert talks with a homeowner

Selling a House With Basement Water Damage in St. Louis: What Sellers Need to Know

You've decided to sell your St. Louis home, and everything is coming together, except for that basement. Maybe it's a musty smell you've learned to walk past, a stain near the sump pump, or a crack that showed up sometime last winter.

Selling a House With Basement Water Damage in St. Louis: What Sellers Need to Know

waterproofing methods for a basement including sump pump, carbon fiber, and drain tile

The Complete Guide to Basement Waterproofing in St. Louis: What Works & What Doesn’t

Basement water intrusion is one of the most common problems St. Louis homeowners face, and one of the most misunderstood.

The Complete Guide to Basement Waterproofing in St. Louis: What Works & What Doesn’t

Basement water intrusion is one of the most common problems St. Louis homeowners face, and one of the most misunderstood.

The Complete Guide to Basement Waterproofing in St. Louis: What Works & What Doesn’t

Basement water intrusion is one of the most common problems St. Louis homeowners face, and one of the most misunderstood.

Finished basement ready for holiday guests in a St. Louis home, dry and fresh

Hosting the Holidays Over a Damp Basement? Prepare Your Basement for Holiday Guests in St. Louis

You've got the guest room ready, the good towels out, and a menu planned down to the last side dish. Then someone heads downstairs to grab a folding chair from the basement, and you watch their face change.

St. Louis Waterproofing, Insulation, & Foundation Repair