Basement Waterproofing in Sunnyside, Queens

Why Do Basements in Sunnyside Get Wet?

Most water comes from outside the wall. Rain runs toward the building, soaks into soil and finds cracks, joints and the floor edge. Sunnyside is inland with no particular flood exposure, so the usual culprits are drainage, old masonry and heavy rain sewer backups.

Older brick buildings here have basements and cellars that were built long before modern waterproofing. Mortar joints open over time, and below grade walls take in water through them.

Gutters and downspouts matter too. If roof water drops next to the wall, the soil there stays saturated. Redirecting that water can remove much of the problem at low cost.

Look at when the water shows up. After rain points to outside drainage. Constant dampness points to a different cause, such as a plumbing leak or high humidity.

How Do We Stop Water Coming Into a Sunnyside Basement?

We work from the outside in. Fix downspouts and grading, repair masonry and parging, seal cracks and, where needed, add interior drainage that carries water to a sump. The scope depends on what the inspection shows.

Exterior fixes keep water from reaching the wall at all. On attached houses, access to the outside wall can be limited, so interior drainage is sometimes the practical option.

Interior drainage collects water at the floor edge and sends it to a sump pump. It manages water that gets in, instead of stopping it at the wall. We explain the tradeoffs so you can choose.

Does sealing the wall always work?

Not always. A coating over a wall with open joints will not hold against steady water pressure. Repair the wall first, then seal it, and fix drainage outside as well.