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Yes, you can pour concrete over an existing concrete patio to resurface it. This is a common repair method called resurfacing. For the best results, the old concrete should be clean and free from debris, and the new slab should be at least three to four inches thick and contain reinforcements, like fiberglass fibers or wire mesh, to avoid cracking.

Whether or not resurfacing concrete is worth it depends on the extent of the damage. If the damage below the top layer of concrete is too extreme, the concrete resurfacing cost may not be worth it, and it’s better to replace it. However, if your concrete has some standard wear and tear, resurfacing can extend its lifespan by adding a protective layer that shields it from future damage—without the cost of replacing the entire slab. Speak with a licensed concrete specialist to determine if resurfacing is the best choice.

The prevention steps are essentially the same, no matter the patio material. Keep the surface clean and maintained. Ensure there's no debris buildup, and cover the whole thing in a quality sealant. If it's the start of a season or it's been a while since you've cleaned the area, use a pressure washer.

Yes, cinder blocks must be primed before painting. Without primer, your paint won't stick to the surface of the blocks. You should use a bonding and filling primer which fills all of the small pores of your blocks. Once the primer dries, you'll have a smoother surface to work with and your paint will stick easily to the blocks.