Company lists · Data refreshed September 2026

Top 25 Residential waterproofing contractors based in the United States

Name: Residential waterproofing contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 976 companies tracked

RevenueBase identified 976 residential waterproofing contractors headquartered in the United States as of September 2026 and tracks 12,558 professional contacts across them, including 3,321 with verified work emails. Houston is the largest hub.

This list covers residential waterproofing contractors headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

976Companies

12,558Contacts tracked

3,321Verified emails

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The 25 largest residential waterproofing contractors based in the United States

Ranked by team size

Top 25 of 976 residential waterproofing contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to residential waterproofing contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Groundworks	Indirect evidence	Virginia Beach, VA, United StatesHQ checked Sep 29, 2026	5,001-10,000	1,132 contacts →
	Indirect evidence “At Groundworks, we're more than just a company; we're a national movement towards safer, more secure foundations for homes and businesses across the United States.” Source: RevenueBase Database · checked Sep 29, 2026
2	Valcourt Group	Indirect evidence	The Woodlands, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	409 contacts →
	Indirect evidence “The Valcourt Group is one of the nation's leading providers of commercial building restoration, repair, and maintenance services.” Source: RevenueBase Database · checked Sep 29, 2026
3	Roof Services	Partial evidence	Deer Park, NY, United StatesHQ checked Sep 29, 2026	51-200	304 contacts →
	Partial evidence “Roof Services is a Commercial roofing contractor.” Source: RevenueBase Database · checked Sep 29, 2026
4	RAM Construction Services	Strong evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	501-1,000	288 contacts →
	Strong evidence “Founded in 1918, RAM Construction Services is the oldest and most experienced waterproofing and restoration contractor in the United States.” Source: RevenueBase Database · checked Sep 29, 2026
5	JES Foundation Repair	Indirect evidence	Nottingham, MD, United StatesHQ checked Sep 29, 2026	5,001-10,000	242 contacts →
	Indirect evidence “JES is proud to be part of Groundworks-North America’s leading and fastest-growing foundation and water management solutions company.” Source: RevenueBase Database · checked Sep 29, 2026
6	Eskola Roofing & Waterproofing	Partial evidence	Morristown, TN, United StatesHQ checked Sep 29, 2026	501-1,000	226 contacts →
	Partial evidence “With over 35 years in the roofing business, Eskola Roofing is a full-service roofing and waterproofing company.” Source: RevenueBase Database · checked Sep 29, 2026
7	Beacon Waterproofing Products	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 29, 2026	51-200	133 contacts →
	Partial evidence “At Beacon Waterproofing, we’re the largest, nationwide distributor of commercial sealants and specialty waterproofing solutions.” Source: RevenueBase Database · checked Sep 29, 2026
8	Basement Systems, INC	Strong evidence	Seymour, CT, United StatesHQ checked Sep 29, 2026	51-200	128 contacts →
	Strong evidence “Basement Systems Inc, based in Seymour, Connecticut, is a network of basement waterproofing and crawl space repair contractors spanning across the United States and Canada.” Source: RevenueBase Database · checked Sep 29, 2026
9	Aquaguard Foundation Solutions	Indirect evidence	Marietta, GA, United StatesHQ checked Sep 29, 2026	1,001-5,000	123 contacts →
	Indirect evidence “AquaGuard is proud to be part of Groundworks-North America’s leading and fastest-growing foundation and water management solutions company.” Source: RevenueBase Database · checked Sep 29, 2026
10	Foundation Recovery Systems	Indirect evidence	Moberly, MO, United StatesHQ checked Sep 29, 2026	5,001-10,000	114 contacts →
	Indirect evidence “Foundation Recovery Systems is proud to be part of Groundworks-North America’s leading and fastest-growing foundation and water management solutions company.” Source: RevenueBase Database · checked Sep 29, 2026
11	Olshan Foundation Repair	Partial evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	201-500	113 contacts →
	Partial evidence “Olshan Foundation Solutions is the premier provider of foundation repair, waterproofing and related services in the markets it serves across the United States.” Source: RevenueBase Database · checked Sep 29, 2026
12	Cantey Foundation Specialists	Indirect evidence	Camden, SC, United StatesHQ checked Sep 29, 2026	51-200	112 contacts →
	Indirect evidence “Cantey Foundation Specialists: Where expertise meets peace of mind.” Source: RevenueBase Database · checked Sep 29, 2026
13	Helitech Waterproofing & Foundation Repair	Partial evidence	Caseyville, IL, United StatesHQ checked Sep 29, 2026	201-500	105 contacts →
	Partial evidence “Helitech is a locally-owned specialty contractor serving Arkansas, Illinois, Indiana, Iowa, Kansas, Kentucky, Missouri, Oklahoma, and Tennessee with a focus on faith and family.” Source: RevenueBase Database · checked Sep 29, 2026
14	Perma-Seal Basement Systems	Partial evidence	Burr Ridge, IL, United StatesHQ checked Sep 29, 2026	201-500	96 contacts →
	Partial evidence “For over 45 years, Perma-Seal has been the trusted name in basement waterproofing, foundation repair, concrete leveling, plumbing, and attic insulation throughout Chicagoland and…” Source: RevenueBase Database · checked Sep 29, 2026
15	GDA Contractors	Indirect evidence	Grand Prairie, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	93 contacts →
	Indirect evidence “In 1993 Daniel “George” Cain, Steven “D.” Wilson and Steven “Alan” Frank (ie.” Source: RevenueBase Database · checked Sep 29, 2026
16	DBS Repair	Indirect evidence	Duluth, MN, United StatesHQ checked Sep 29, 2026	51-200	92 contacts →
	Indirect evidence “Since 2012, DBS has proudly served Minnesota and Wisconsin with expert solutions for basements, foundations, concrete, insulation, and whole-home energy performance.” Source: RevenueBase Database · checked Sep 29, 2026
17	Ayers Basement Systems	Strong evidence	Lansing, MI, United StatesHQ checked Sep 29, 2026	51-200	89 contacts →
	Strong evidence “Ayers Basement Systems is a family-owned, veteran-owned, and locally operated basement waterproofing and foundation repair contractor serving Michigan and Northern Indiana since…” Source: RevenueBase Database · checked Sep 29, 2026
18	AFS Foundation & Waterproofing Specialists	Indirect evidence	Alabaster, AL, United StatesHQ checked Sep 29, 2026	5,001-10,000	87 contacts →
	Indirect evidence “AFS is proud to be part of Groundworks-North America’s leading and fastest-growing foundation and water management solutions company.” Source: RevenueBase Database · checked Sep 29, 2026
19	Acculevel INC	Indirect evidence	Rossville, IN, United StatesHQ checked Sep 29, 2026	201-500	87 contacts →
	Indirect evidence “Acculevel is your go-to foundation expert.” Source: RevenueBase Database · checked Sep 29, 2026
20	'58 Foundations & Waterproofing	Partial evidence	Knoxville, NC, United StatesHQ checked Sep 29, 2026	201-500	83 contacts →
	Partial evidence “58 Foundations & Waterproofing, inventor of the interior basement waterproofing system, has been providing five-star customer experiences in basement waterproofing, crawlspace…” Source: RevenueBase Database · checked Sep 29, 2026
21	Woods Basement Systems, INC	Partial evidence	Collinsville, IL, United StatesHQ checked Sep 29, 2026	51-200	79 contacts →
	Partial evidence “In 1986, Rick and Anna Lee Woods, with a partner, started a waterproofing company called Basement DeWatering Systems Metro-East, Inc.” Source: RevenueBase Database · checked Sep 29, 2026
22	Crawlspace Medic	Indirect evidence	Columbia, SC, United StatesHQ checked Sep 29, 2026	11-50	78 contacts →
	Indirect evidence “Crawlspace Medic is the only legitimate franchisor in crawl space and basement repair, nobody else has organized this category at a national scale.” Source: RevenueBase Database · checked Sep 29, 2026
23	Ohio State Waterproofing	Partial evidence	Macedonia, OH, United StatesHQ checked Sep 29, 2026	51-200	78 contacts →
	Partial evidence “Ohio State Waterproofing has provided quality service with over successful waterproofing and foundation repair installations and satisfied customers since our inception in 1978.” Source: RevenueBase Database · checked Sep 29, 2026
24	Aquaguard Waterproofing	Partial evidence	Beltsville, MD, United StatesHQ checked Sep 29, 2026	11-50	72 contacts →
	Partial evidence “Aquaguard waterproofing has serviced the region for more than 25 years.” Source: RevenueBase Database · checked Sep 29, 2026
25	Foundation Systems Of Michigan	Partial evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	5,001-10,000	66 contacts →
	Partial evidence “Groundworks, formerly Foundation Systems of Michigan, is North America's leading provider of Foundation Repair, Crawl Space Encapsulation, Basement Waterproofing, and Concrete…” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: residential waterproofing contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names residential waterproofing contractors.
Partial evidence: Its own public description names part of residential waterproofing contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name residential waterproofing contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 976 residential waterproofing contractors based in the United States

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Residential waterproofing contractors based in the United States at a glance

As of Sep 29, 2026

26.4%Verified-email coverage

12.9Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

354

11-50

456

51-200

115

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 976 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among residential waterproofing contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “residential waterproofing contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names residential waterproofing contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among residential waterproofing contractors, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 3,321 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names residential waterproofing contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many residential waterproofing contractors are there based in the United States?

RevenueBase identified 976 residential waterproofing contractors headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Groundworks, headquartered in Virginia Beach, tops this list with the largest team on record.

Which city has the most residential waterproofing contractors?

Houston leads with 12 headquartered companies, followed by Dallas (9) and New York (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,321 verified decision-maker contacts tracked across these 976 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.