A Level Landing in Front of the Garage Door

The last stretch of driveway at the garage should be a controlled landing so water does not run in and the car does not hang up on a sharp grade break.

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What the landing is doing

A garage floor is nearly flat, and the driveway may fall toward the street or rise to meet a steep lot. The short section just outside the door is the landing where those shapes meet. If that section tilts toward the door, rain runs into the garage. If it breaks sharply, a car's bumper or trailer hitch scrapes, and the door may meet a hump. The landing is built in the base grades before asphalt goes down. It is not a wedge of sealer and it is not the flexible gap filler some people put in the joint under the door. That joint is a different detail. Here the question is the pavement slope for several feet outside, so a person can stand on it and a car can rest without a drama in either direction.

How to look at the grade break

Use a straightedge from the garage slab onto the driveway. A small, even transition is what you want. A ridge that rocks the board, or a valley that holds a puddle against the door, is what you do not. Measure the length of the landing you actually have. On a steep drive, the landing may need to be longer so the car is not on two slopes at once. There is no universal length, because vehicles differ. Drive your lowest car slowly to the door during the estimate and see where it scrapes or where water would go. A measuring wheel can record the distance from the door to the street for the overall plan. It will not design the vertical curve, and it is not a survey. Photograph the straightedge reading before paving so the crew has a target.

Repairs that do not trap the door

Milling a high bump down can restore a landing if the remaining asphalt is still thick enough. Adding mix to fill a valley can raise the pavement into the door sweep, so check the closed door and the threshold before you add height. A trench drain set in a formed landing is one way people intercept water that must arrive at a low garage, and it has to be low enough to collect water and strong enough for tires. Estimate added asphalt by area and thickness with AsphaltTons.com, confirm a planning density around 140 to 150 pounds per cubic foot with the plant, and accept their price that day. Do not feather a thin patch at the doorway. It will peel, and the scrape or the leak will come back. After the work, hose the landing. Water should not enter the garage, and the door should close without binding on the mat.

A practical sequence

Set a straightedge from the garage slab onto the driveway and find the break.
Check your lowest car for scraping and watch where hose water travels.
Mill a bump or rebuild the landing without raising the mat into the door.
Confirm the door closes and water stays outside after the asphalt cools.

The mistake to skip

Building a sharp ramp at the threshold so the center of the car scrapes every entry.

Questions people ask

How long should the landing be?

Long enough for your vehicles to sit off the steep slope and for water to be directed away or into a drain. Measure with your own cars rather than a single rule.

Can sealer make the landing less slippery when wet?

A film does not fix a grade break or a puddle at the door. Shape and drainage do that. Texture products are a separate, label-specific choice.

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