Concrete – Anchoring post brackets to textured concrete slab

concretepatio

I want to bolt posts to a concrete patio to make a roof. The surface of the concrete has texture to it. I figured the texture is meant for a better grip in wet weather.

Should I smooth out the concrete areas where posts will be, so the bracket and concrete have full surface contact or is it fine to bolt brackets as it is?

If I should – would some watery cement/sand mix do the job? Texture is 1mm pores at most, I was thinking of filling those up with cement or other solution.

Best Answer

I'd just spread some siliconizer on the concrete and place the bracket on top. That will keep any water/moisture from accumulating under the brackets. In doing similar work, I've had great results using lag shields and stainless steel screws.