Installing DekTek Tile Over Existing Concrete
In Warmer States Where There is No Freeze Thaw Cycles
- DekTek Tile can be applied directly over existing concrete if the concrete is in good condition. If cracks are large and can possibly move, then see Alternate Method for concrete that is in bad condition, listed below.
- First seal tiles (top only). This will keep the grout from discoloring the tile when grouting.
- Use Thinset or outdoor construction adhesive to adhere to concrete.
- Grout tile joints with cementitious grout.
- After grout cures, reseal tile to include grout joints.
- If concrete has cracks less than 1/8” wide, treat them with anti-fracture membrane (available in most tile stores) before setting tile.
This is the Best Method for Cold, Freeze-Thaw States
Lay treated lumber or ground contact treated lumber 1”x4” or 2”x4” flat on existing concrete, and set 16” on center. (Thin sleepers would also work if desired but should be a minimum of ¼” thick.) Sleepers should run in the direction that the water will drain. Mechanically fasten sleeper into the existing concrete. Attach the DekTek Tiles to sleepers with construction adhesive. or mechanically fasten. Add extra framing for edges to allow for wood or composite edge trims, then lay tile (see elevated deck installation instructions).
Outside edge trims must be mechanically fastened when installed over wood joists or sleepers. This will ensure that the glued down tiles will stay locked in place.
Please feel free to call us at 218-380-9330 with any questions. Thank you!
*If concrete has cracks less than 1/8” wide, treat them with anti-fracture membrane (available in most tile stores) before setting tile.*
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