A Driveway Sloped Back Toward the House

If the driveway falls toward the house, every rain delivers water to the garage and the foundation. Turn the water aside or rebuild the slope. A sealcoat will not reverse gravity.

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Why this slope is costly

Asphalt is a roof you drive on. When it tilts toward the building, water stacks against the door, seeps at the slab joint, and can reach a basement wall or a sill. In winter that water freezes on the apron of the door and under the tires. Cracks facing the house become intakes. People often notice the problem as a wet garage floor and blame the door seal. The seal may be tired, but the water should not have been sent there. Stand in the rain or use a hose. If flow is toward the building, write that down before you buy sealer. Sealcoat is a thin coating. It has no slope. Cold patch in the doorway is a temporary dam that usually makes a new puddle somewhere worse.

Fixes that match how bad the fall is

A slight tilt might be intercepted by a trench drain set in a level landing, with the outlet carried to daylight or an approved drain, not to the neighbor's property without permission. A strong tilt toward the house is a regrade: reconstruct the base so the surface falls to a safe outlet, or mill and overlay only if you can change the shape without burying the door and without leaving feather edges. Adding a thick asphalt wedge against the garage to 'push water out' often raises the joint above the slab and still leaves a birdbath farther down. Estimate any new asphalt with length, width, and real thickness at AsphaltTons.com. Use about 145 pounds per cubic foot as a planning default, confirm the 140 to 150 range with the plant, and pay the quoted price. A measuring wheel can size the area and is not a survey of which way the ground falls. Fall is a level reading.

While you plan the permanent work

Keep the existing cracks that face the house sealed if the pavement is otherwise stable, so you are not pouring rain straight into the base. Extend downspouts that currently dump on the high part of the drive and run to the door. Do not stack sandbags as a permanent curb against the siding. After a rebuild, repeat the hose test from the street side and from the middle. Water should reach the outlet you designed and stop before the garage. Photograph the test. If a contractor says a sealcoat product is 'waterproof enough' to ignore the slope, that claim does not match what a film can do. Structural slope errors are corrected with grade, drains, or new pavement thickness, not with a coating.

A practical sequence

Hose the driveway and confirm water runs toward the house.
Extend downspouts and seal stable cracks as temporary water control.
Install a proper intercept drain or rebuild the slope away from the building.
Hose-test again so the garage stays dry without a makeshift dam.

The mistake to skip

Sealcoating a back-pitched driveway and expecting the garage to stay dry.

Questions people ask

Will a new overlay automatically fix the slope?

Only if it is thick enough and shaped on purpose. A uniform overlay keeps the old slope and may raise the door joint.

Can I grind only the high area by the street?

Sometimes, if that restores a fall away from the house and leaves adequate thickness. Check both drainage and remaining depth.

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