Company Facts
Thrasher Foundation & Concrete Repair at a Glance
The work
- Best for
- Homes with foundation, concrete and basement moisture problems together
- Primary service
- Waterproofing
Where
- Headquarters
- Denver, CO
- Service area
- Denver
- Emergency service
- Not advertised
Money and guarantees
- Free estimates
- Yes
- Financing
- Available
- Workmanship warranty
- The company describes its warranties and guarantees as fully transferable and gives customers a copy of the warranty. One reviewer reports a five year warranty on concrete work. Ask for the exact term and coverage for your job in writing.
Credentials
- Better Business Bureau profile (seal displayed on company site)
- Better Business Bureau profile (seal displayed on company site) (reported by the company, not verified)
Editorial Review
Our Take on Thrasher Foundation & Concrete Repair
Thrasher is the pick for homeowners whose problem is bigger than a damp wall, with foundation, concrete and drainage handled by one crew. Its review base is strong at 4.8 from 926, but much of it describes concrete jobs. Treat its basement scope like any other and ask for it in writing.
Best forHomes with foundation, concrete and basement moisture problems together
What We Like
- Family-owned since 1975, per the company, with a staffed Denver branch and named Denver managers
- 4.8 from 926 Google reviews, read October 21, 2026
- Foundation, crawl space, concrete leveling and basement drainage handled by one company
- Free inspection, same-day estimate and GreenSky financing with a 12 month no-interest option
- Warranties described as fully transferable, and a reviewer reports a warranty-backed driveway repair visit
Things to Consider
- The office is in Henderson, a Commerce City address north of Denver, so crews travel to southern suburbs
- Many reviews describe concrete work, so confirm basement waterproofing experience for your specific problem
- One four star review reports streaky residue after sealing, which the crew was working to correct
Customer Ratings
Google Reviews for Thrasher Foundation & Concrete Repair
Customer ratings shown here come from Google. They are separate from our editorial review above.
Rating Distribution
- 5 stars94%
- 4 stars2%
- 3 stars1%
- 2 stars1%
- 1 star3%
iAbout this distribution
The distribution reflects the 937 Google reviews available when this profile's review data was last refreshed on October 28, 2026. Ratings and counts change continuously on Google, so figures here may lag the live profile slightly. We publish only the values returned by the source, never estimates for missing bands.
Recent Google Reviews
Editorial Ranking
Why Thrasher Foundation & Concrete Repair Made Our Top 5
It holds position 3 in 5 Best Waterproofing Companies in Denver, CO (2026).
Areas Served
Based in Denver, CO.
iAbout service coverage
Coverage is as the business describes it, cross-checked against where its recent documented work is. A company will often travel beyond the areas listed here for a large job and decline a small one at the same distance, so confirm your address before scheduling.
Company Background
About Thrasher Foundation & Concrete Repair
Thrasher Foundation & Concrete Repair handles more than wet basements. Its Denver crew levels sunken driveways with foam, caulks and seals cracked slabs, repairs foundations and crawl spaces, and installs interior drainage and sump systems, which makes it a practical single call when water, settling and cracked concrete show up together.
The Denver branch works from 9652 Hanover Ct W in Henderson, a Commerce City address north of the city. The company's Denver service page names Aurora, Westminster, Arvada, Littleton, Boulder, Parker, Longmont and Colorado Springs among the communities it reaches. Thrasher is a multi-state, family-owned business that says it has operated since 1975, with offices across Nebraska, Kansas, Iowa, Missouri, Illinois and Colorado. Its team page lists a Denver regional manager, Shae Mapes, along with a Denver service manager, production manager and sales manager.
For wet basements the company installs the WaterGuard interior drainage system, sump pumps, wall vapor barriers, dehumidifiers and gutter solutions. Crawl space encapsulation and structural support are also offered. The concrete side covers foam leveling, caulking, sealing and polyaspartic coating. Thrasher gives free inspections with a same-day estimate, offers financing through GreenSky, and describes its warranties as fully transferable. One reviewer reports a five year warranty on a driveway and porch job.
Thrasher Foundation & Concrete Repair shows 4.8 from 926 Google reviews, read October 21, 2026, and sits at position 3 on Google Maps for Denver waterproofing. Reviewers name Angelo, Ted, Andrii, Jose, Abdullah, John and Susan for being thorough and on time. Most of the recent praise concerns concrete leveling and sealing rather than basement drainage. One four star review from Zach reports streaky white residue on a sealed surface; he says the crew kept working to fix it and blames old paint under the sealant.
Colorado has no statewide waterproofing licence. The City and County of Denver licenses contractors and requires permits for structural work, and plumbing is licensed by the Colorado State Plumbing Board. This company suits homeowners facing foundation, concrete and moisture problems together who want one contractor and financing. It suits less well anyone who wants a waterproofing-only specialist or a small local firm. Before booking, ask who will be on your crew, get the warranty in writing, confirm licence and permit requirements with Denver Community Planning and Development, check insurance, review the Better Business Bureau record, and ask whether any sump or drain plumbing needs a licensed plumber.
iWhere this information comes from
Company history, ownership and capability details on this page are provided by the business and reviewed by our editors for plausibility and consistency. They are not the same as the credentials block, where each item carries its own verification status and source.
Other Sources
Reputation by Source
We show each source separately rather than blending them into a single score, because they measure different things.
Pricing
Company Pricing & Estimates
What this company publishes about its own pricing.
- Free estimates
- Yes
- Financing
- Available
- Workmanship warranty
- The company describes its warranties and guarantees as fully transferable and gives customers a copy of the warranty. One reviewer reports a five year warranty on concrete work. Ask for the exact term and coverage for your job in writing.
Gallery
Project Photos
Business-submitted, reviewed by our editors
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Thrasher Foundation & Concrete Repair FAQs
Is Thrasher Foundation & Concrete Repair licensed in Denver?
Colorado has no statewide waterproofing licence, so there is no state number to look up for this trade. The City and County of Denver licenses contractors and requires permits for structural work, and plumbing is licensed by the Colorado State Plumbing Board. Thrasher's site does not publish a licence number, so ask for it, confirm requirements with Denver Community Planning and Development, and check insurance and the Better Business Bureau record.
What are Thrasher Foundation & Concrete Repair's hours in Denver?
Google lists the Henderson branch as open Monday to Friday 7:00 AM to 6:00 PM, Saturday 9:00 AM to 6:00 PM and Sunday 12:00 PM to 6:00 PM. Thrasher's site does not advertise 24 hour emergency service, so ask when you call whether an urgent flooding visit is possible. Call +1 720-513-0951 to book a free inspection.
Does Thrasher offer a warranty and financing, and where does it work around Denver?
Yes to both. Thrasher describes its warranties as fully transferable and offers GreenSky financing, including a 12 month no-interest plan for same-day signers and a standard 11.99% APR plan. Its Denver page lists Aurora, Westminster, Arvada, Littleton, Boulder, Parker, Longmont and Colorado Springs as nearby communities. Get the warranty term for your job in writing, since a reviewer reports five years on concrete work.
Is Thrasher Foundation & Concrete Repair licensed and insured?
We checked 0 of 1 credentials against the issuing authority. Verified items carry the date we checked; reported items are what the business told us and we could not independently confirm.
What areas does Thrasher Foundation & Concrete Repair serve?
Denver. Coverage is as the business describes it, cross-checked against where its recent documented work is. Confirm your address before scheduling, particularly at the edge of a service area.
Does Thrasher Foundation & Concrete Repair offer emergency service?
Emergency availability is not listed for this company. If you need an urgent call-out, check the ranking for companies that do list it.
What warranty do they offer?
The company describes its warranties and guarantees as fully transferable and gives customers a copy of the warranty. One reviewer reports a five year warranty on concrete work. Ask for the exact term and coverage for your job in writing.. There are usually two warranties on a job: the manufacturer covers materials, the contractor covers workmanship. Get both in writing and check whether the workmanship coverage transfers if you sell.
How was this profile built?
Credentials come from issuing authorities, ratings from the company's Google Business Profile with the date we read them, and the editorial take from our own review of estimates, warranty documents and public feedback. Anything the business told us is labelled as reported.
Can a business pay to improve its profile?
A business can subscribe to manage its own listing details, and it can buy a labelled sponsored placement. Neither changes a ranking position or the editorial assessment on this page.
Is Something Incorrect?
Business information changes. Tell us about an address, phone, website, service area, credential or ownership change, or let us know if this company has closed.
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About This Business Profile
- Last reviewed
- October 2026
- Profile last updated
- November 11, 2026
- Google review data updated
- October 28, 2026
- Sources checked
- Issuing authorities, Google Business Profile, Company website
- Could not verify
- Better Business Bureau profile (seal displayed on company site) (reported only), insurance
- Sponsorship status
- No commercial relationship