Exterior Foundation Waterproofing in New Jersey
Exterior waterproofing keeps water out of the wall altogether. The crew digs down to the footing, cleans and repairs the wall, applies a waterproof membrane and drainage board, lays a footing drain in stone and backfills.
Digging conditions differ across New Jersey
South and east of the Fall Line that runs from Carteret through Princeton Junction to Trenton, crews dig through Coastal Plain sand, silt and clay. North and west of it, on Piedmont and Highlands ground in counties like Hunterdon, they are more likely to meet rock and steep grades.
Ask what the contractor expects to find on your side of that line, and how rock or a high water table would change the price.
811 before any excavation
New Jersey law requires anyone who plans to dig to give at least three business days' notice by calling 811, and the Board of Public Utilities tells homeowners not to let work start if the lines aren't marked. The service is free.
Flood zones
If the house is in a FEMA Special Flood Hazard Area, excavation and drainage work may need more review. New Jersey's Flood Risk Notification Tool lets you check an address before the contractor visits.
- Walls to be excavated and depth
- Membrane, protection board and drain outlet
- Who restores lawn, beds and walks
- Permit and inspection responsibilities
Exterior Foundation Waterproofing questions
How much notice does New Jersey require before excavation?
At least three business days, through 811. The contractor normally places the call; don't let digging start until lines are marked.
Is exterior waterproofing harder in northern New Jersey?
Often. North of the Fall Line, lots on Piedmont and Highlands rock can be steeper and rockier, which slows excavation.
Can I check if my New Jersey home is in a flood zone?
Yes. The state's Flood Risk Notification Tool shows whether an address overlaps a FEMA flood hazard area.
Exterior Foundation Waterproofing estimates by area
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