Pool Deck Pavers

I own a courtyard home in South Florida.



The original pool deck was a poured concrete slab approximately 6" deep. Two years ago we had the pool refinished and had 1" brick pavers installed over the concrete slab. The pavers were set in sand on top of the concrete slab and sand was spread across the pavers to interlock them together.

Recently the pavers that are located under the lanai area (covered) are experiencing severe efflorescence. I'm told that this is because the sand under these pavers stays damp because they aren't exposed to the sun and this dampness causes the efflorescence.

I am now considering having the pavers removed and installing travertine pavers in their place. My question is two-fold; first, does travertine also produce efflorescence? second, can I have the travertine pavers set in thinset instead of sand. Thank you in advance for you help.

Dan Hazard

ANSWER

From everything I have read and learned about travertine pavers, there is no efflorescence.

Travertine can be installed on existing concrete as long as it is in good condition...no settling or cracks. The stones can me mortared on to your concrete base, but what type of mortar to use is something that you should check out with a mason. It can definitely be done though.

Travertine pavers are typically set in sand, but I believe you can also set them in mortar. You can also use polymeric sand, which hardens.

Good luck and if you have any further questions, let me know.

Susan