I've got a trough drain in front of my garage (inward sloping driveway makes
it a river in rainstorms). I recently rebuilt the trough and all the
concrete around it, using treated plywood as the form (due to limitations,
the form had to stay installed).
I coated the entire inside and railing with rubberized spray undercoat,
thinking it would work great. it did, for about a month. In cleaning the
drain out (it acts as a nice trap for dirt and crud before it drains), I was
pulling up the undercoat too :-( So I'm looking to seal the concrete
inside the trough with something tougher as it holds water a lot of the time
(which will lead to concrete failure prematurely I'm sure).
I've got a "plastic based" sealer that is VERY thick....it resembles a thick
tar substance both in smell and look, and is VERY sticky. I'm debating
buying a larger container of this stuff and slathering it inside the trough.
I've used it to seal my foundation when I noticed some cracked parging, and
it is seriously tough. not easy to work with, but tough.
is there something more appropriate for this application? I guess any goo I
can lay on the cement that will keep the water off it will work, won't it?
hmmm....why do we have products for sealing concrete from water if water
doesn't affect it? I'm told that concrete (being porous) will absorb a good
amount of water, and when it gets real cold out, this water freezes,
splitting the concrete.
in this light, and since I live where there's more winter than summer, you
can see why I don't want water being absorbed? or is this all myth?
While I don't claim to be an expert on the frozen north (you can see
I live in Texas), I believe that most freeze related damage to
concrete occurs from frost heave. This occurs due to the moisture
in the soil around and under the concrete rather than in the
As I said, I am no expert on frost heave. If there are tundra
experts out there that can correct my information if it is
incorrect, I look forward to hearing from them.
I actually used 2x6 treated boards. the form created my channel, and the
rail/grate sysytem sat right on top. the rail/grate has nice 1" wide
"straps" that spread out into the fresh concrete, holding the system in
so, with the rail/grate on top, fresh concrete all around, I could not think
of any other way to do it but leave it in place.
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