The Sales Pitch vs Reality
Alright I'm gonna be real honest here because there's a lot of bad info floating around about concrete overlays. Some companies push overlays on everything because it's cheaper to install and they can sell you on it easier. "Why tear out the old concrete when we can just go over it?" Sounds great right?
Sometimes it IS great. Sometimes it's a waste of your money. Let me explain.
When Overlays Work
- The existing concrete is structurally sound - no settling, no major cracks, the base is solid. It just looks ugly.
- You want a cosmetic refresh - maybe the surface is discolored or lightly spalled but the slab itself is fine.
- Pool deck resurfacing - this is where overlays really shine. A cool deck coating over a solid pool deck can look brand new and give you a slip-resistant, cooler surface.
- Budget is tight - an overlay can cost 30-50% less than a full tear-out and replacement. That's real money.
When They DON'T Work
- Structural cracks - if the slab is cracked because of settling or base failure, putting an overlay on top is like putting a fresh coat of paint on a car with a blown engine. Those cracks WILL come through the overlay. Usually within a year.
- Tree root damage - the roots lifted the slab? The overlay isn't going to fix that. The roots are still there doing their thing.
- Bad drainage - if water is undermining the slab, an overlay just gives water a prettier surface to destroy.
- Already has an overlay - overlay on overlay is asking for delamination. We won't do it.
How I Decide
When someone calls about an overlay I always come look at it first. I get on my hands and knees and check the cracks. I tap on the surface and listen for hollow spots (means the overlay would have nothing to bond to). I check the drainage situation. I look at the overall condition of the base.
And sometimes I tell people "honestly, you need to tear this out and start over." That's not what they want to hear. But I'd rather lose a sale than have my name on a job that's gonna fail in a year.
A good overlay on a good substrate can last 10-15 years easily. A bad overlay on a bad substrate might not last one Florida rainy season.
Not sure which you need? Call us for a free assessment. We'll tell you straight.