Garage door seal

Jul 08, 2026 Last reply: 1 week ago 2 Replies
C

Around 40 years ago, I dealt with water ingress underneath my garage door, which sees no vehicular movement, by creating a threshold from a redundant arris rail.



I screwed it down with, IIRC, some No More Nails underneath it.



It is an up-and-over door, and the vertical face of the arris rail is inside, with the closed door butting against it. There is minimal clearance between the door and the concrete floor.



A recent storm managed to get some water to run under it, so I guess it may be time to lift and refresh.



What would be the best sealant for renovation?



I know there are purpose-made rubber threshold strips, but the ones I have seen need clearance underneath the door.



Chris


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J

It sounds like any suitable bit of trim will do the trick if bonded down with something decent. Sika FC 11 would be my choice - sticks really well to most things, and is very tough and waterproof.

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B

We’ve had a roller door for 15+ years but, prior to that, we had an up and over door which had gaps all around.

We didn’t get much water ingress, a bit in really bad weather, the real issue was leaves.

I bough a roll of plastic damp course material. For the sides and top, I cut lengths of 1/2 width and used a pop rivet gun to fix it as ‘flaps’ on the door. They touched the ‘frame’ of the opening. For the bottom, I cut a length which was a long as the door was wide, folded in half length ways, and fixed along the inside bottom edge just touching the floor.

Not a perfect seal, if the gully outside the door flooded we sometimes got a bit of water in, but that was very rare.

When the roller door was fitted, they fitted a rubber ‘ridge’. The shape wouldn’t work, as fitted, for an up and over door.

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