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Wet basements and crawlspaces are the work Roger's Masonry and Waterproofing names on its Angi listing: waterproofing, foundation work, and basement or crawlspace encapsulation, run from an address on Carmine Road in Nashua. The same listing states 16 years in the trade and free estimates. Angi also marks the business as not offering emergency service or warranties, which is worth knowing if your water problem tends to show up mid-storm. For a basement or crawlspace you want sealed and dried out, that is the trade this company puts forward. Take the free estimate in writing with the scope spelled out, ask what happens if water finds its way back in, and confirm New Hampshire licensing and insurance before anyone opens up a foundation.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Roger's Masonry and Waterproofing. 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.
Estimated range
$7,600 – $15,000
Typical waterproofing project around $11,300
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No changes recorded yet — last scanned Sep 14, 2026.
Basement waterproofing5.0
Retaining walls5.0
Bulkhead replacement4.8
Brick and 1850s fieldstone foundations repointed4.8
Structural carpentry4.8
Owner-led communication4.8