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Flexway Masonry and Chimney is a Burlington, MA outfit run by John, doing masonry, chimney work, and foundation and basement waterproofing — plus patios, walkways, retaining walls and paving — across towns stretching from Boston and Lexington into southern New Hampshire. The company says it's been in business 15 years and backs new builds with a 10-year warranty. The two most recent reviews, from July 2026, describe its biggest jobs: a full chimney removal — torn out from the roof down through the house into the basement, with the roof closed in, damaged wood replaced and new underlayment installed — and a basement refinish after water was coming through the foundation wall, where the team installed a new drainage system, repointed the masonry, and left the space watertight. Reviews dated across 2024 and 2025 describe the same range of work — chimney crowns, caps and cracks repaired and sealed, fieldstone foundations repointed, basements dried out with regraded drainage — and in a 2024 review, a homeowner who called about an emergency leak said John showed up within the hour. One 2023 review, from another mason who says he's subcontracted Flexway on multiple jobs, called the work consistently five-star. Its service area is wide — Woburn, Bedford, Lexington, Boston, Billerica and Lowell in Massachusetts, plus several southern New Hampshire towns — so it's worth confirming which of the site's listed services (retaining walls, paving, stairs) a given quote actually covers, since the reviews cluster mostly around chimney and waterproofing work. For chimney rebuilds or a leaking foundation, the described work — and the repeat subcontracting from a fellow mason — points toward real technical competence; for smaller add-on projects like walkways or steps, the reviews are shorter but consistently positive too.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Flexway Masonry and Chimney. 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
I couldn’t be happier with the outstanding work Flexway Masonry completed on my home. They removed my entire chimney from the roof all the way down through the house into the basement, and the whole project was handled professionally from start to finish. Once the chimney was removed, they completely closed in the roof and carried out all the necessary repairs, including replacing the damaged wood, installing new underlayment and roofing paper, and leaving everything completely weatherproof. Their workmanship was first-class, and you would never know such a major project had ever taken place. Inside my home, they repaired all the drywall, expertly plastered the walls and ceilings, and finished everything with a fresh coat of paint. The finish is absolutely flawless—you would never believe there had ever been a chimney running through the house. Every room was left looking perfect. The crew was hardworking, respectful, punctual, and kept everything clean throughout the job. Their attention to detail and quality of workmanship exceeded all of my expectations. I highly recommend Flexway Masonry to anyone looking for honest, skilled professionals. If you’re looking for a company that takes pride in its work and delivers exceptional results, these are the people to call. Thank you again for an amazing job
I recently hired Flexway Masonry to completely refinish my entire basement after I was having water coming through the outside foundation wall. Their team installed a brand-new drainage system, professionally repointed and restored the masonry where needed, and fully waterproofed the entire basement from start to finish. The quality of the workmanship was outstanding, and they kept me informed throughout the whole project. My basement is now completely dry, watertight, and looks fantastic. It’s a huge relief knowing the water issues have been properly resolved. I couldn’t be happier with the results and would highly recommend Flexway Masonry to anyone looking for reliable basement waterproofing and foundation repair. Thank you for an excellent job!
Our home’s foundation had started sinking slightly, causing gaps in the floors. They used specialized techniques to level everything out and stabilize the structure for the long term.
Poor exterior drainage was causing water to pool near our foundation, leading to slow leaks. Their team regraded the soil and added waterproofing, solving the issue for good.
Our old chimney had missing mortar and signs of water damage. Their masonry repair work was outstanding, sealing all weak spots and ensuring long-lasting protection.
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1 change recorded — last scanned Aug 15, 2026.
Careful, honest advice3.0
Roof survived a major storm intact5.0
Foundation repairs4.1
Waterproofing work4.4