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Posted by dpb on June 7, 2008, 9:38 am
brad@example.com wrote:
> A botched concrete pour by a contractor to extend a patio by 150 sq.ft.
> has resulted in an uneven surface. The outer region is the correct level
> but the surface level smoothly slopes down to a level about one inch lower
> near the center.
>
> The contractor has suggested using a self leveling concrete pour to even
> everything out. This would fill in with depths ranging from about an
> inch near the center to essentially zero depth near the outer areas where
> the new concrete pour meets the original patio.
>
> How well will the self leveling concrete adhere to the surface near the
> outer parts of the region where the fill depth would be essentially zero?
>
> Should the outer regions be ground down to a minimum depth first?
...
Depends on the product -- some manufacturers say theirs can be feathered
out, others require minimum thickness of from 1- to 2/16". In general,
the 2-part epoxy formulations are more likely (but not universal) to
allow feathering out while the polymer-modified cementitous products
require a minimum thickness. In short, follow manufacturer's
instructions carefully and read the product specifications first.
I would recommend one of the epoxy formulations for the purpose outlined.
--
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