Basement Waterproofing in Buffalo, NY

What the crew fixes

Most people who call about a wet basement say one of these things.

• "Water comes in every spring when the snow melts.".
• "It puddles where the wall meets the floor after a hard rain.".
• "One wall is always damp and the paint is peeling off.".
• "There is a white crust on the block and it smells musty down there.".
• "My sump pump runs all the time, or I do not have one.".
• "The floor drain backs up in big storms.".
• "Water drips through a crack in the wall.".
• "I want to finish the basement but I am afraid it will flood.".

Each of these has a different cause and a different fix. The inspection finds where the water is getting in before anyone sells you a system.

Waterproofing methods your local crew may recommend

Interior drain and sump pump

This is the most common fix for Buffalo basements. The crew cuts a narrow trench in the floor along the inside of the wall. They lay a pipe with small holes in gravel. Then they cover it with new concrete. Water that comes through the wall or up at the joint flows into the pipe and drains to a sump pump. The pump sends it outside and away from the house.

It works on block, poured and stone walls. It does not need digging in the yard. It is often paired with a plastic wall sheet that guides water down into the drain.

Sump pump install or replacement

Some basements only need a working pump. Your pit may be old or too small, or the pump may run nonstop. A new pump with a tight lid and a check valve may solve it. A battery backup pump keeps water moving during a power outage.

Outside waterproofing

The crew digs down to the footing on the outside and cleans the wall. They seal it with a waterproof coating or sheet. Then they lay new drain tile at the bottom. This stops water before it reaches the wall. It costs more and tears up the yard. So it is often used on one problem wall, or when the outside drain tile has failed.

Crack sealing

One leaking crack in a poured wall can often be sealed from inside. The crew pumps in a flexible foam that fills the crack all the way through. See foundation crack repair.

Gutters, downspouts and grading

The cheapest fix comes first. Downspouts that dump next to the wall and soil that slopes toward the house send roof water straight into the basement. Extending downspouts several feet out and building up the soil so it slopes away can cut down a lot of leaks. A good inspector checks this before recommending anything bigger.

When water and wall movement go together

If the wall is cracked sideways or bowing in, water is only half the story. The soil is pushing on the wall. Waterproofing alone will not stop that. See bowing wall repair.

What a good waterproofing inspection covers

• Where the water shows up, and when: spring melt, heavy rain or both.
• Every wall, including behind shelves and paneling where the inspector can see.
• The joint where the wall meets the floor.
• Cracks, loose mortar and any wall movement.
• The sump pit, pump, discharge line and check valve.
• Floor drains and whether they back up.
• Gutters, downspouts, grading, window wells and nearby trees.
• A written plan that shows where the drain goes, where the pump goes and why.

The cost table on this page shows typical published ranges from the Fixr and This Old House 2026 cost guides, not a quote.

Questions to ask before you sign

1. Where exactly is the water coming in, and how do you know?
2. Is this an inside drain, an outside dig or both?
3. How many feet of drain, and where does the pump discharge?
4. Is a battery backup included or extra?
5. What does the warranty cover, for how long, and does it move to the next owner?
6. Who pulls the permit, if one is needed?