
Is crawl space encapsulation worth it for your house?
Encapsulation turns a damp, vented crawl space into a sealed, dry one.
Read the guideOwner guides
Written by Harvey Dempsey from the questions our crews hear most, so you can make sense of a water problem before anyone cuts into a floor or a wall.
These guides cover the water problems we see in Jersey City buildings every week: why basements here leak where they do, interior versus exterior waterproofing, sump pumps and backups, sewer backups and backwater valves, crawl spaces, roof decks and parapets. No sales pitch, just what we would tell a neighbor.
Each guide links to the related service page and to our waterproofing cost guide when you want numbers.


Encapsulation turns a damp, vented crawl space into a sealed, dry one.
Read the guide
Every flat roof holds a little water after a storm.
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A finished basement hides the walls and floor that show you where water gets in.
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In heavy rain the sewer under the street can run full and push water back into the lowest drain in your building.
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When a flat roof leaks, the membrane takes the blame.
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A basement full of water makes everyone want to rush.
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A sump pump is the quiet part of a dry basement until the night it stops.
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A roof deck turns a flat roof into the best room in the house, and it also hides the membrane that keeps the house dry.
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Most whole-basement systems here land between $3,900 and $14,800, and the spread is wide for real reasons.
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Both approaches work when they match the building.
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Most wet basements in the city come down to a handful of causes tied to the ground under the building and the age of its walls.
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Call (201) 578-5199. Someone picks up day and night.