Concrete repair, basement waterproofing, crawl space & foundation repair in Denver, CO

Thrasher Foundation Repair is proud to offer the very best home services in Denver and the surrounding areas, including the following:

Thrasher Foundation Repair’s Local Service Offering:

Winterize your concrete with concrete sealant

Protect your concrete from the freeze/thaw cycle with SealantPro, a permanent sealant that penetrates deeply into the pores and bonds with the concrete to create a strong, permanent barrier. With SealantPro, your concrete is protected from pitting, flaking and cracking.


We’ve been bringing the best to the West since 1975 and are thrilled to offer our services to the great state of Colorado!

Thrasher Foundation Repair - Now Serving the Greater Denver Area!

When folks think of the Western United States, a few images come immediately to mind. One may imagine rolling plains, dense forests, canyons cut deep into the soil, or towering mountains hidden by the morning fog. When it comes to Western cities, Denver may be the quintessential member of the whole group.

Nestled at the foot of the mighty Rocky Mountains’ front range, our city has been a premier destination for travelers, tourists, businesses, and fans of the great outdoors for hundreds of years. With a bustling metropolitan center and quick access to some of America’s greatest scenery, wildlife, and recreational activities, it’s no wonder Denver was one of just 14 cities in the U.S. to add 100,000 residents to its urban population between 2010 and 2020. And like the good folks who sought new opportunities in the gateway to the Rockies over the last several years, so too did Thrasher Foundation Repair. Our newest location represents our constant drive to improve our business and succeed in challenging ventures, an ethos exemplified by the people of Denver dating back to the 1850s.

The weather can be extreme in a city at altitude. Winter brings blankets of snow without fail, and the spring thaw releases millions of gallons of water into many of the area’s rivers and creeks, like the South Platte or Cherry Creek. Heavy rainfalls have caused massive flooding, as recently as the 2013 regional flood event that caused nearly $4 billion in damages. Between heavy rains, snowmelt, freeze-and-thaw cycles, and occasional flooding, basements and foundations in the Mile High City are always under pressure.

Thrasher Foundation Repair specializes in basement and foundation solutions, including basement waterproofing, sump pump and drainage installations, foundation repairs, and more. We also perform crawl space encapsulation and concrete leveling and repair services throughout the Denver area. We’ll repair bowing foundation walls, fix and prevent wet basements, repair concrete driveways, and more, using the best products and practices. Our company has been in business for more than forty-five years, and we’re excited to bring our expertise to your door!

We offer no-cost, no-obligation estimates for clients in Denver and the surrounding area. Call now to schedule yours today!

Testimonials From Denver
I'm so happy we called Thrasher to take care of these issues. They were able to get the job installed...
Testimonial by Juila H. from Denver, CO
The process was so easy from beginning to end considering this was for a real state deal. I'm happy it was...
Testimonial by Zach S. from Denver, CO
Extremely happy with all of the work and the crews professionalism and clean up!
Testimonial by Steve B. from Lakewood, CO
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Professional Basement Waterproofing Services in Denver, CO

Wet basements are a sign of deteriorating structural health for any building, and never something you want to see in your home. As we mentioned earlier, Denver is a city built around a series of drainages at the foothill of America’s premier mountain range. Heavy winter snowfall, voluminous spring snowmelt, and torrential summer rains can lead to flooding and excess moisture buildup in the soil around your home. This occurrence causes external pressures and heightens the potential for damage to your basement over time.

Water infiltration results from a variety of factors, while repairs and preventative measures differ depending on the situation. That’s why you need the expert basement waterproofing contractors at Thrasher Foundation Repair. Our professional teams are trained to identify the root causes of wet basements, providing customized fixes for your home’s specific problems. There are no boilerplate solutions when you work with Thrasher Foundation Repair. We will design and implement a basement waterproofing system that works specifically for your home, delivering lasting results and peace of mind. Wherever you are in the greater Denver area, we’re the basement waterproofing team to call!

We offer no-cost, no-obligation basement waterproofing inspection and service estimates across Denver. Contact us today to schedule yours!

We offer the following basement waterproofing products and solutions:

  • Interior drainage systems
  • Dehumidifiers
  • Sump pumps
  • And more!

Denver, CO’s Local Foundation Repair Experts

Helical pile foundation supports are installed at a Denver construction site
If your foundation is in distress, don't worry! We'll take it from here.

The foundation is the backbone of your home, and Thrasher Foundation Repair is your local foundation repair expert. We treat buildings as a system of interlocking components, all centered around stability at the foundation. Like any structure, strength comes from the base, and your home is no different. If you’ve noticed cracks in basement foundation walls or floors, sticking windows or doors, a tilting chimney, or any common foundation damage symptoms, then it’s time to call in the experts.

Pressures to foundations arise from several issues, like hydrostatic pressure, shifting soil compositions, soil heave, and settlement. Hydrostatic pressure results from excess moisture lingering in the fill-in soil around your foundation, increasing its density and pushing at the walls with added force. Heave happens when expansive soils expand, forcefully pushing themselves upwards against your home’s slab. Settlement is similar in function to heave, instead causing a foundation to sink as soils shift and contract beneath your home.

With Thrasher Foundation Repair, you no longer have to worry about your home’s foundation problems. We offer lasting, customized foundation repair services that will meet your every need. If you’ve got street creep issues, foundation cracks, or a tilting chimney, you know who to call.

We offer free foundation estimates for clients in the Denver area. Call now to get yours!

Foundation Problems We Fix:

  • Foundation settlement & sinking
  • Sticking windows & doors
  • Tilting chimneys
  • Tilting & bowing walls
  • Cracked foundation walls & floors
  • Collapsing retaining walls
  • Sagging crawl space
  • Uneven floors
  • Sagging garage door lintels

Our Foundation Repair Products:

  • Crawl space support posts
  • Push piers & helical piers
  • Wall anchors
  • Street creep repairs
  • Foundation wall brace & beams
  • Carbon fiber wall straps
  • Foundation settlement repair
  • Foundation crack repair

Denver’s Concrete Leveling & Repair Contractor

Technicians install a compression guard in a Denver driveway
We're experts in concrete repair of all kinds. We repair
pool decks, driveways, sidewalks, and more!

While concrete is undoubtedly a strong and resilient building material, it’s not indestructible. We’ve all seen sunken sidewalks, cracked driveways, chipped building walls, or other clear signs of concrete decay throughout our lives. Causes of this damage vary by region, primarily due to environmental factors. In Colorado, concrete is constantly stressed by our long, harsh winters, and subsequent periods of freezing, thawing, and the presence of excess moisture. As concrete freezes it contracts, expanding in warmer conditions and creating tiny pores within the structure. In periods of high moisture - like the spring thaw - these pores will absorb and retain water. This trapped water, if frozen again, will expand to a volume greater than its liquid form. This expansion leads to damage like cracking, pitting, flaking, and even internal corrosion of rebar and other internal metal components.

With Thrasher Foundation Repair, you have nothing to fear if your concrete has deteriorated. Whether it’s your driveway, a pool deck, or the sidewalk, our concrete repair and leveling experts can identify the issue and prescribe a tailored solution to alleviate your concrete problems once and for all. We specialize in both repairing damaged concrete and leveling sunken or uneven slabs, and we’ve got almost five decades of experience behind us to ensure your satisfaction.

We offer no-cost concrete repair estimates in Denver and the surrounding area. We’re standing by to give you a hand!

Our concrete repair solutions:

  • PolyLevel® concrete leveling
  • NexusPro™ cracked concrete repair
  • SealantPro™ concrete sealing
  • Commercial concrete repairs
  • Driveway repairs
  • Pool deck leveling
  • Sidewalk repairs
  • Step repairs

Reliable Concrete Sealing for Flaking, Cracked Concrete

Concrete repair company installing SealantPro concrete sealing in a Denver driveway
Prevent flaking, cracked concrete in Denver with
SealantPro™ concrete sealing!

Moisture is a slab's worst enemy. As temperatures fluctuate, water within untreated concrete expands and shrinks during freeze-thaw cycles. This exerts pressure on the slab and weakens the structure, leading to sinking, cracked concrete and causing discoloration, peeling, and flaking. When major features of your home or building are impacted, including the driveway, walkway, patio, or pool deck, this can reduce the curb appeal and value of the property. And even worse, these sinking, cracked concrete slabs are also a safety concern, as these uneven surfaces are falling hazards and can cause injuries.

Since Denver, CO is prone to flooding and moisture issues, home and property owners need a sure-fire concrete repair solution for peeling, flaking, and cracked concrete. That's where Thrasher Foundation Repair can help with SealantPro™ concrete sealing. This concrete sealing system extends the lifespan of slabs by 3 to 5 times overall in just one quick application. SealantPro permanently bonds to slabs, providing lifelong protection against water damage, peeling, flaking, concrete cracks, discoloration from UV rays, and more! Plus, SealantPro also makes concrete easier to clean, preventing staining and ensuring your slabs look great for years to come.

Benefits of our concrete sealing system:

  • Extends slabs' lifespan by 3-5 times overall
  • Permenately bonds with slabs in one quick application
  • Reduces ice bonding, making ice removal easier
  • Protects against water damage, UV rays, pitting, concrete cracks, stains & more
  • Can be applied to new & existing slabs
  • Concrete sealing system cures in 6 hours, so you can use slabs the same day

Get a free estimate on our concrete sealing and concrete repair systems to learn more. We provide concrete repair services in areas throughout Colorado, including Denver and nearby!

Professional Crawl Space Repair Contractors in Denver, CO

A SmartJack crawl space support system is installed in a local Denver crawl space
Whether you need moisture remediation, waterproofing, or
structural support, Thrasher has your crawl space covered.

In many households, the crawlspace isn’t often thought of. It’s a space beneath your floor where few will ever feel the need to enter - why worry? While this line of thinking may be common all across the country, Thrasher Foundation Repair has seen and serviced enough crawl spaces to know that proper maintenance and care of this part of your home is vital.

Dirty and neglected crawl spaces can be a serious detriment to your building. Over time, dirt, dust, even pests and structural rot can take hold of the area, eventually causing problems with air quality, mold, musky smells, and declining structural integrity. While these issues aren’t as obvious as a cracked wall or sunken driveway, these problems don’t go away on their own and can be both repaired and prevented with the right crawl space repair contractor.

Our suite of crawl space repair products is designed to meet many challenges head-on, whether it be moisture infiltration, sagging support beams, dirt accumulation, or even permanent crawl space encapsulation. We offer the best products installed by highly-trained crawl space experts, guaranteeing your satisfaction and ensuring the long-term health of your home.

For more information and a no-cost, no-obligation crawl space repair estimate in Denver, call the pros at Thrasher Foundation Repair today!

Our crawl space repair system includes:

  • Crawl space vapor barrier
  • Crawl space insulation
  • Crawl space support posts
  • Crawl space dehumidifiers
  • Crawl space sump pumps
  • And more!

Call the experts at Thrasher Foundation Repair for your free, on-site foundation repair, basement waterproofing, or concrete repair estimate!

There's no better time to take care of your lingering household issues than the present. Whether you've got a cracked driveway, a tilting chimney, or a smelly crawlspace, Thrasher Foundation Repair has the tools and experience to properly assess the situation and prescribe the perfect solution.

Our experts are standing by! Give Thrasher Foundation Repair a call today!

Before and After Pictures from Denver

Recent job requests in Denver, CO

Neighborhood: N Vine St, Denver, 80205

It seems like one corner of my house is sinking due to a crack in the wall that has appeared in last year and a half. I'd like a free estimate appointment.

Neighborhood: Monroe St, Denver, 80206

Water is occasionally weeping through the basement wall in one particular area only. I've addressed downspout water dispersal, which has helped, but has not cured the problem.

Neighborhood: S Newton ST, Denver, 80219

Have some cracks on walls

Neighborhood: Denver, 80233

We have 1 large square on the driveway that needs to be leveled.

Neighborhood: Wellington Street, Denver, 80234

Sinking foundation

Neighborhood: Netherland St., Denver, 80249

My driveway has sunk and cracked in several of the sections. I'm hoping the repair will eliminate the alternative of replacement.

Neighborhood: S Geneva St, Denver, 80231

Our porch is sinking which has caused a part of the roof line to slope slightly, we would like to see what it would cost to level the porch.

Neighborhood: Denver, 80219

Service: Foundation cracks or sinking

Neighborhood: HUDSON ST, Denver, 80207

Hello - we'd like to schedule a foundation system to see if there are any issues and potential solutions. Thank you

Neighborhood: Cherry Street, Denver, 80207

Several times a year the smell in my basement is horrendous and I pull the carpet back and the pad is soaking wet

Neighborhood: Galapago Street, Denver, 80221

Front stop and concrete slab next to it needs lifted and repaired

Neighborhood: W Clyde Pl, Denver, 80211

Main floor of house is uneven/sinking in places, doors don't fit to floors, cracks in walls

Neighborhood: W Hawthorne Pl, Denver, 80221

The house has sagging floors and want to see of there are foundation problems and if it can be repaired

Neighborhood: S Decatur St, Denver, 80219

Hello, We're looking to get an estimate to help stabilize an addition on this property. Home is vacant and can been seen at anytime.

Neighborhood: Utica St, Denver, 80212

Foundation cracking

Neighborhood: Dorothy Blvd, Denver, 80229

Water in crawl space on top of previously installed vapor barrier. Have already shop-vac'd water out, but some seemed to have returned - unsure where it is coming from.

Neighborhood: W Arizona Ave, Denver, 80232

Patio slab dropped about 2 inches on one side.

Neighborhood: Denver, 80204

Service: Gutter replacement

Neighborhood: Denver, 80260

We need a quote for new jacks in our crawl space.

Neighborhood: Denver, 80260

Hi! We did some renovations in our basement and found a horizontal crack along our foundation wall. I'd like to get a quote on epoxy injection and carbon fiber straps. Thanks!
Job Stories From Denver, CO
Porch Repair in Denver, CO

This homeowner has a lot of elderly visitors and did not want her walkway and front patio to be a tripping hazards. After seeing commercials and reading reviews online, she knew she could trust us, so she called Thrasher. System Design Specialist, Jeff Schlimm, came out to meet with her. Jeff did his inspection and found her patio was sinking due to washout. This caused the slabs to become uneven over time. Jeff took these findings and came back to the homeowner with a solution. Jeff proposed we use PolyLevel to lift, level, and stabilize the slab, and NexusPro to seal the joints. Both of these products are waterproof, preventing any more washout in the future. The homeowner was very happy with the work and we know she has the peace of mind of her visitors. 

Porch Repair in Denver, CO

This homeowner has a lot of elderly visitors, and did not want her walkway and patio to be a tripping hazard. She knew of Thrasher and saw our commercials, so she gave us a call. System Design Specialist, Jeff Schlimm, came out to meet with her. Jeff did his inspection and found her walkway had settled due to washout. This caused her concrete slabs to become uneven over time. Jeff took these findings and came back to the homeowner with a solution. Jeff proposed we used PolyLevel to lift, level, and stabilize the patio, and NexusPro to seal off the joints. These products are both waterproof, preventing any more washout to happy. She loved this solution we sent out our installation team. There is no doubt she has the peace of mind she needs for her visitors. 

Crawlspace Repair in Denver, CO

The homeowner of this property was looking to sell but knew he would need to get crawlspace foundation repair before it could go on the market. He knew of Thrashers reputation and that we would easily work with his engineer solution, so he had his real estate agent reach out. System Design Specialist, Anthony Salcedo, came out to meet with them. Anthony took a look at the report, as well as did his own inspection. Anthony found three of the foundation walls were failing, and two of them were in very poor condition. The bad soil in this area was continually pushing in laterally and causing a tremendous amount of aesthetic damage throughout the crawlspace. Per the engineer report, vertical supports were called for, as well as support for the footings on both walls. These specifications were met by using our helical piers and nails.  For the other failing walls, we were able to use our Power Braces and Everbrace. These would ensure the pressure from the soil outside would not be able to press the walls in any further. We were also able to install our Turtl system, which made an easy access point into the crawlspace. The homeowner and real estate agent were very happy with this process and how easy it was from beginning to end. There is no doubt the new homeowners loved the transferrable warranties, and feel safe in their new home. 

Concrete Patio Repair in Lakewood, CO

This homeowner had a back patio that was very damaged and cracked. She wanted to get it back into placed and have a good repair to eliminate the look of it and any tripping hazards. She knew of Thrasher reputation and loved that our company has been in business for over 45 years. She gave us a call and System Design Specialist, Tim Flathers, came out to meet with her. Tim noticed the concrete had moisture that had gotten under the slab and caused the damage. Tim proposed we use our Polylevel to lift and level, NexusPro to seal the joints and cracks, and SealantPro to protect the surface. The homeowner was excited about the project, and loved our warranty and track record. She said yes, and we sent out our installation team! There is no doubt this homeowner is not worrying about her back patio any longer. 

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