Reviewed: the leading basement waterproofing networks - interior drainage, exterior membrane and sump systems compared.
Groundworks is the largest US foundation and basement waterproofing network in 2026, while Basement Systems pioneered interior drainage with the WaterGuard system. Permaseal leads in the Midwest, AquaGuard in the Southeast, and B-Dry is the longest-standing brand with a 60-year-old transferable lifetime warranty.
Side-by-side overview of every pro we reviewed.
| Pro | Rating | Best For | Starting Price | Method | Warranty | Install Time |
|---|---|---|---|---|---|---|
#1Groundworks | 9.1/10 | Largest US network | From $4,500 | Interior + sump + crack injection | Transferable lifetime | 2–4 days |
Basement Systems | 8.9/10 | Patented WaterGuard | From $5,000 | WaterGuard interior drain | Lifetime transferable | 2–3 days |
Permaseal | 8.7/10 | Midwest leader | From $4,800 | Interior + sump | Lifetime transferable | 2–4 days |
AquaGuard Foundation Solutions | 8.5/10 | Southeast specialist | From $4,800 | Interior + exterior | Lifetime transferable | 2–5 days |
B-Dry | 8.4/10 | Original patented system | From $5,200 | Interior B-Dry system | Lifetime transferable | 2–4 days |
Source: QuackQuack editorial · Data verified April 2026
Answers to the questions homeowners ask most before getting quotes.
Our editors apply a single methodology to every category so you can compare apples to apples.
Years in business, accreditations (BBB, NARI, manufacturer-certified), and independent customer reviews.
Quality of materials, installer training, length and transferability of labor and product warranties.
Quoted price ranges, in-house financing terms, and how transparent the company is about costs.
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