About United Waterproofing
Google Maps lists United Waterproofing as a basement waterproofing and crawl space company in Dover, New Jersey.
Services named on unitedwaterproofingnj.com: foundation crack repair, bowing basement wall repair, foundation waterproofing and crawl space encapsulation. The quotes below link to the page where each one appears, so you can check them.
Its website mentions 25 years of experience.
Google Maps lists it as open 24 hours, every day.
Foundation services
What United Waterproofing says on its website
- Foundation crack repair
Structural Crack Repair
unitedwaterproofingnj.com - Bowing basement wall repair
Compare carbon fiber, wall anchors, and beams, see
unitedwaterproofingnj.com - Foundation waterproofing
Basement Waterproofing & Repair in NJ | United Waterproofing
unitedwaterproofingnj.com - Crawl space encapsulation
See 2026 price ranges for drainage, sump, and encapsulation,
unitedwaterproofingnj.com
Quoted from its website, read in October 2026.
Inspections, warranty and payment
- Free estimate
FREE QUOTE
unitedwaterproofingnj.com - Warranty
Transferable warranty on all basement waterproofing systems
unitedwaterproofingnj.com
What its website says (October 2026). Ask for the warranty in writing and read what it covers before signing.
Opening hours
| Monday | Open 24 hours |
|---|---|
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| Thursday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
| Sunday | Open 24 hours |
As listed on Google Maps (July 2026). Call before visiting – hours change.
United Waterproofing on the map
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Other pins: companies within 30 miles. Map data © OpenStreetMap contributors.
Before you call, ask about
- Interior drain, exterior membrane or crack injection – and why
- Whether a battery backup sump pump is included
- What the warranty promises: a dry basement, or only the system
- How they'll handle structural cracks or bowing walls, if any
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Questions about this company
How do I contact United Waterproofing?
By phone at (973) 343-2086. Through its website, unitedwaterproofingnj.com.
When is United Waterproofing open?
Google Maps lists it as open 24 hours, every day.
What foundation services does United Waterproofing offer?
On its website it mentions foundation crack repair, bowing basement wall repair, foundation waterproofing and crawl space encapsulation.
Does United Waterproofing offer free inspections?
Its website mentions “FREE QUOTE”. Ask what the visit includes and whether you'll get the findings in writing.
How much does foundation repair cost in New Jersey?
Estimated for New Jersey: sealing a crack about $263–$842; repairing a settling foundation about $4,738–$21,060, mostly depending on the number of piers. Try the cost calculator and compare written quotes.
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