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Help needed before prep.
- Thread starter gsnake
- Start date
, some input would be appreciated.
Edger
Well-known member
Looks like spalling due to water seeping upwards from the end of the garage slab on the outside and then blowing off the surface when the sun got onto it. Also looks like this happened before the outside ramp strip was laid so it may not be a problem now.
To fix it you need to vacuum it to remove dust and use a patching product to fill up the holes, preferably epoxy based. Then the best way to smooth it is to hire a handheld diamond grinder with dust head and vacuum.
Another way is to buy some thinset and trowell over, do it a second time after the first has cured because the first application will sink in the holes a bit. It may even require a third, but be careful not to leave anything on the slab or you will have to grind it off and also do not wait too long before the second or third application, you do not want it to cure too long (days) before the next application, should be instructions with it.
To fix it you need to vacuum it to remove dust and use a patching product to fill up the holes, preferably epoxy based. Then the best way to smooth it is to hire a handheld diamond grinder with dust head and vacuum.
Another way is to buy some thinset and trowell over, do it a second time after the first has cured because the first application will sink in the holes a bit. It may even require a third, but be careful not to leave anything on the slab or you will have to grind it off and also do not wait too long before the second or third application, you do not want it to cure too long (days) before the next application, should be instructions with it.
LegacyIndustrial
ALLIANCE MEMBER
Here is our product: http://legacyindustrial.net/cart/epoxy-concrete-patch-1-gal-hd110-p-6.html
You would not use all the aggregate, leave it soupy, use a steel trowel to keep it tight to the level of the floor. Once cured lightly grind/sand level and then you can apply your coatings. Any epoxy (Epoxy Coat, Alpha, etc...) will adhere to it.
Good luck.
You would not use all the aggregate, leave it soupy, use a steel trowel to keep it tight to the level of the floor. Once cured lightly grind/sand level and then you can apply your coatings. Any epoxy (Epoxy Coat, Alpha, etc...) will adhere to it.
Good luck.
I have similar issues with my garage threshold as well. I was planning on grinding and then putting in the patch material. Is the consensus among the experts here that I should for sure patch and then grind? Also, I talked with epoxy-coat and I am planning on coating the entire floor out past the garage door to the expansion joint. I am then putting a polyurea top coat which is UV stable. That way my patch material cant be seen at all on the outside of the garage door. Good luck! Chad
Edger
Well-known member
Thanks Edger I'm going to look around, can you recommend me any products or brand?
Sorry I am in Australia so I cannot recommend, but Legacy should have all the right stuff.