Quick Answer

Grind a pool deck to a CSP 3-4 profile before resurfacing: remove the old coating or sealer with PCD, then diamond grind with a 30/46 metal-bond disc to a uniform scratch. Expect to open up spalled or hollow areas and repair them before the new overlay goes on. Always let the deck dry fully before coating.

Why Pool Decks Are Special

Pool decks see constant water, chlorine, and sun. The old sealer or paint has usually broken down in patches, and the slab often has spalling at the expansion joints. Light grinding is not enough; you need to open the surface mechanically.

Step by Step

1. Drain and dry. Wait 48 hours after the last heavy rain.
2. Patch spalls with polymer-modified mortar. Let cure 24 hours.
3. Remove old sealer with PCD tooling. Our Piranha PCD prep tooling handles pool-deck coatings.
4. Diamond grind with 30/46 grit metal bond like our R3 round-segment grinding shoes. Target CSP 3-4.
5. Edges and coping: hand-grind with a 5-inch grinder and dust shroud.
6. Vacuum and inspect. The deck should look uniformly scratched, with no shiny patches.

Recommended Profile by Resurfacing Product

Overlay type	Recommended CSP
Thin acrylic stain	CSP 2-3
Epoxy pool deck coating	CSP 3-4
Cementitious overlay 3-6 mm	CSP 4-5
Spray-knockdown texture	CSP 3-4

Browse concrete grinding discs category for the full metal-bond range.

Frequently Asked Questions

Q: Can I grind a pool deck in wet weather?

No. The slab must be dry. Moisture trapped under the new coating causes blistering.

Q: Do I need to remove the old cool-deck texture?

Yes, if it is loose or spalling. Grind it flat before applying the new system.

Q: How long after grinding can I coat?

Within 24 hours. Dust settles on the ground and reduces adhesion.

Conclusion

Pool deck resurfacing rewards preparation: PCD off the old sealer, 30/46 metal bond to a CSP 3-4, and patch before coat. contact JOY TECH for tooling sized to your grinder.