WATER-
PROOFING
Basement and foundation waterproofing in Connecticut. Interior and exterior solutions that stop water at the source. Licensed, insured, and priced with a free estimate.
Waterproofing Services in Connecticut
Four Services & Masonry LLC provides interior and exterior waterproofing for basements and foundations in Connecticut. We find where the water is getting in and stop it at the source.
Connecticut's wet springs, high water tables, and freeze-thaw cycles keep pressure on your foundation year-round. We use drainage systems, sealants, and barriers rated for these conditions.
Every waterproofing project starts with a free on-site assessment. You get a written price and a clear scope before any work begins.
Get Your Free Estimate
What We Seal and Protect
Our waterproofing contractors in Connecticut handle basement sealing, foundation waterproofing, drainage, sump pumps, and crack injection.
Interior Waterproofing
Perimeter drains, sump pumps, and vapor barriers that capture water inside the basement and pump it out before it causes damage.
Exterior Waterproofing
Excavation, membrane application, and footing drains that stop water before it ever reaches the foundation wall.
Crack Injection
Epoxy and polyurethane injection that seals foundation cracks from the inside, blocking water entry without exterior excavation.
Drainage Systems
French drains, curtain drains, and grading corrections that redirect water away from your foundation and keep it dry.
Sump Pump Installation
Primary and battery backup sump pumps that keep your basement dry even during power outages and heavy storms.
Vapor Barriers
Wall and floor vapor barriers that block moisture migration through concrete and masonry, reducing humidity and mold risk.
Waterproofing that stops the source.
We find where water gets in and fix it permanently. Fifteen years of keeping Connecticut basements dry.
We Fix The Source
We trace where water enters and fix that, not just the symptoms. That is why our waterproofing does not fail the next storm.
Fifteen Years Of Waterproofing
Fifteen years of sealing Connecticut basements and foundations means we have seen every type of water entry and know how to stop it.
Licensed, Insured, Free Estimates
Every waterproofing job is licensed, insured, and quoted with a free estimate, so you know the price before work begins.
How We Work
Recent Waterproofing Projects in Connecticut
Other Services We Offer
Pair your waterproofing project with these related services from .
Masonry Services
Retaining walls, stone walls, brick, chimney repair, and steps.
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Foundation Services
Repair, replacement, crack sealing, and new installation.
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Excavation Services
Site prep, land clearing, grading, and foundation excavation.
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Patio Installation
Bluestone, paver, stone, brick, and concrete patios.
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Asphalt Paving
Driveway installation, resurfacing, sealcoating, and repair.
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Fence Installation
Aluminum, vinyl, and wood fence installation and repair.
Learn MoreWaterproofing in Your Connecticut Town
Frequently Asked Questions
It depends on the source, the method, and the size of the area. A free estimate gives you an exact written price for your basement.
Exterior stops water before it enters but costs more. Interior manages water that gets in with less digging. Many homes need a combination.
A sump pump handles water that is already inside. But if the source outside is not addressed, the pump is fighting the problem instead of solving it.
Yes. We use epoxy and polyurethane crack injection to seal cracks from the inside, blocking water without exterior excavation.
We serve Brookfield, Newtown, Ridgefield, New Fairfield, Sherman, Southbury, Bethel, and nearby Connecticut towns.
Get Your Free Estimate
No obligation. We respond within 2 hours.