ᐅ Waterproofing Garage Door / Floor – Any Experiences?

Hello,

Maybe you can help me.

My garage has a concrete slab floor.

It is tiled. On the front side, there is a stainless steel finishing strip.

Yesterday, I noticed that when it rains, a small amount of water seeps through the joints into the garage. Around the edges, only the joints were visibly darker due to moisture. In the middle, there was a small puddle.

The rubber seal of the Hörmann sectional door sits flush, but the joints are slightly recessed compared to the tiles.

I would like to make the garage watertight.

Here are some ideas I have—maybe one of them is good?

One option is to attach an L-profile (stair nosing) or transition profile on the tiles or edge, either glued or screwed on. These are usually 1-2 mm thick (approximately 0.04-0.08 inches). The door would sit more solidly but should still close completely. Water wouldn’t be able to run underneath anymore.

Option two is a rubber seal, available for example on Amazon. The thinnest one I found is still 12 mm high (about 0.5 inches). I’m concerned that the door might not close completely then, since its contact point would be significantly higher.

What do you think?

During heavy rain, some water does get in here as well (mostly at the sides, since there are a few open spots), but normally there is a slope that drains toward the door, allowing the water to run off quickly. Does your garage have no slope? Additionally, the paving directly adjacent to the garage is also installed with a slight slope.

So, no water is coming in from the side for me. Only from below. No, there is no slope… Paving will still be installed. As mentioned above, my concern is about water getting under the rubber seal / joint.

I would apply a so-called drip edge profile, positioning the highest point behind the rubber seal of the gate. To compare it with garden shears, it would be bypass type rather than anvil type.