No state license for this trade. New Hampshire doesn't license or register waterproofing / foundation businesses, so there's no state registry to check. That's true of every waterproofing / foundation business in the state, not a mark against this one. Insurance is self-reported.
Verified record
No state license for this trade. New Hampshire doesn't license or register waterproofing / foundation businesses, so there's no state registry to check. That's true of every waterproofing / foundation business in the state, not a mark against this one. Insurance is self-reported.
BBB grade — an A+ on its Better Business Bureau page
Streamline Waterproofing & Caulking, LLC describes itself on its Better Business Bureau page as installing waterproofing materials that keep water out of buildings, parking garages and other structures. The same BBB page lists waterproofing and caulking services and gives the company an A+ grade.
Heard around town
On Reddit
Any recommendations for an *affordable* company to install a sump pump in my basement?May 10, 2025
“You can also try Streamline Waterproofing in Londonderry”
What does basement waterproofing cost in Greater Manchester?
Typical New Hampshire range for this kind of work, from regional averages — not a quote from STREAMLINE WATERPROOFING & CAULKING. Use it to sanity-check bids, then get the real number in writing.
Not sure which you need? Start with an inspection — many reputable companies assess free, and independent assessments run up to $500.
The wall run getting the drain — a full 30×40 ft basement is about 140 ft.
