I have a problem with rainwater getting in under my garage door onto the
concrete floor. I need to provide some sort of "lip" (about 25-30 mm
high) to prevent this. Should I use concrete for this or just mortar?
Regards and thanks in advance,
I wouldn't use either. I'd get a piece of 1" square mild steel tubing
the right length to fit across the doorway, and screw it to the floor
just inside the door (with some sealant under it if necessary). That
will stay put far better than mortar, etc. and you'll be able to drive
over it quite happily.
I had the same problem, but with the addition of the prevalent winds
driving the rain directly onto the door. Originally I had an up and
over type and despite adding a batten sealed to the floor, the water
still managed to get in.
When I originally built the garage, I made the error of making the
floor slab perfectly level. Doing it again I would always incline it
just slightly towards the entrance door. I later built an 10 foot
extension on the rear and inclined that by 1/2" over the 10' towards
its separate, but equally exposed entrance door. No problems with
On changing to a powered roller (which has a rubber seal along the
bottom) I removed the batten, but still had the problem of ingress
occasionally, so I cut a channel along just to the outside of the door
in the concrete leading to a drain. I then added some shallow slots in
the concrete leading from the channel at 90 deg to and slightly past
the door seal. That has no fully cured the problem.
The garge at my previous house had a rubber sealing strip of about those
dimensions bolted to the floor by the door. I didn't have any problems
with water getting in.
This is similar to what I had :
(Amazon.com product link shortened)
You can't use concrete because it's got stones in it, which means you can't
chamfer it off.
Mortar will crack up when you drive over it, although garages are rarely
used to store vehicles these days, so if it's not going to be driven over,
use strong mortar and pva the cleaned concrete prior to laying it, otherwise
I'd follow Roger's advice WRT using a piece of steel tubing or angle iron
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