Foundation & Basement Waterproofing

Water gets into basements through cracks, wall-floor joints, failed waterproofing on the outside of the wall, poor grading, clogged drains and window wells. Painting a wet wall from the inside rarely solves the problem for long.

We trace the water first. Depending on what we find, the fix can be sealing cracks, regrading so water runs away from the house, repairing leaders and drains, exterior excavation and waterproofing membrane, or an interior drainage system that carries water to a sump.

We explain the options and the trade-offs. Exterior waterproofing stops water at the wall but means digging; interior systems manage water that gets in. See also drainage and sump pumps.

What’s included

• Inspection to trace the water source
• Crack and joint sealing
• Grading and leader/drain corrections
• Exterior excavation and membrane where appropriate
• Interior drainage options
• Clear written scope

Where we do this work

All five boroughs: Queens, Brooklyn, The Bronx, Manhattan, Staten Island.

Property types: Homes & Houses.

Frequently asked questions