Verified ranking · Updated June 2026
Best Basement Waterproofing in Manchester, NH
How we rank (the Bedrock Standard). Every figure below is dated and sourced; star ratings change over time. We read five-star share together with review depth, so a near-perfect share on a large review base counts for more than a perfect score on a small one.
The deepest verified review base of any full-system waterproofer serving Manchester (4.8 across 676 Google reviews, June 2026), a family-owned NH firm in Hudson with direct local accountability, a clean BBB record (A+, accredited 2015, 2 complaints in three years), and the deepest documented radon track record in the set as a National Radon Defense contractor. It installs the national Basement Systems product line rather than a system of its own.
Leads the Manchester Google local pack and holds the highest rating of the full-system options (4.9 across 567 Google reviews, June 2026), with a patented national product line and in-house financing. It ranks second on our methodology, not first, because it is a national consolidator (headquartered in Virginia Beach, VA; the Hooksett branch was formerly the independent firm Rescon) whose warranty service runs through the national company, and its corporate BBB profile shows 741 complaints closed in three years, about 69 percent of them service or repair.
Holds the highest star rating of any company here (5.0 across 165 Google reviews, a 100 percent five-star share, June 2026) and a spotless BBB record (accredited 2025, 0 complaints in three years), and it is a genuine local independent. It ranks third only because it serves Manchester from Plaistow rather than being Manchester-based, and it publishes no named system or warranty terms, where the two companies above publish more for a buyer to check in advance.
Also serving the area
Manchester-based and second in the Google local pack, but a foundation crack-injection specialist (epoxy and urethane) rather than a full perimeter-drainage waterproofer. The right, lower-cost call for a single wall crack or a leaking bulkhead, not a whole-basement water problem (4.8 across 51 reviews). See the head-to-head comparisons below.
The southern-NH and Seacoast local independent in East Kingston that also reaches the greater Manchester area. It carries the cleanest proportional review record of this group (4.9 across 250 reviews, 97.6 percent five-star), a self-branded Forever Dry System with a published transferable warranty, and in-house radon. Its home turf is the Seacoast, so it is not in the Manchester local pack, but it is worth a quote.
Side-by-side
| Company | Type | Google (June 2026) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| Erickson Foundation Solutions | local national brand | 4.8 / 676 | Installs the national Basement Systems line (TripleSafe, SaniDry, WaterGuard) rather than a self-branded system | Transferable written warranty (duration not stated). | A+, accredited 2015, 2 complaints (3yr) |
| Groundworks | national consolidator | 4.9 / 567 | Patented national product line (IntelliJack, AquaStop) | Lifetime, transferable, nationally backed (verbatim terms not verified). | A+ (corporate); 741 complaints closed in 3 years, 514 Service/Repair (~69%), per BBB national profile, accessed June 2026 |
| Reliable Basement Waterproofing | local independent | 5 / 165 | None | No warranty terms published on its website (may be presented at quote). | A+, BBB accredited 2025, 0 complaints (3yr) |
| Crack-X | local national brand | 4.8 / 51 | The Crack-X process (epoxy/urethane crack injection; not full perimeter drainage) | 10-year transferable warranty on most wall cracks. | A+ but not accredited (Manchester profile) |
| 603 Basement Solutions | local independent | 4.9 / 250 | Forever Dry System | Publishes a transferable "Dry for Life" guarantee (marketing wording; exact written terms pending). | A+, BBB accredited since 2022 |
Head-to-head comparisons
- Groundworks vs 603 Basement Solutions
- 603 Basement Solutions vs Erickson Foundation Solutions
- Local Independent vs National Consolidator
- 603 Basement Solutions vs Crack-X
- Reliable Basement Waterproofing vs 603 Basement Solutions
- Groundworks vs Erickson Foundation Solutions
- 603 Basement Solutions vs NH Dry Basement
- Crack-X vs Groundworks
- TC Hafford Basement Systems vs 603 Basement Solutions
Other services in Manchester, NH
- Best Foundation Repair in Manchester, NH
- Best Crawl Space Encapsulation in Manchester, NH
- Best Radon Mitigation in Manchester, NH
Data verified as of the dates shown; star ratings change over time. See our methodology.