T
Tilerdurden
No mate just lay on top of hardibacker and crack on.
I'd check for flatness prior to installing. You may need to level your floors with self levelling compound before applying your uncoupler. Bal level Max is one of the better ones on the market with decent flexi properties due to fibre strand tech. Can level up to a depth of 80mm in one sitting and is ready to accept light foot traffic usually within 3 hours and largely depending on product depth, ambient and surface temperatures. Best of luck mate.
I'd check for flatness prior to installing. You may need to level your floors with self levelling compound before applying your uncoupler. Bal level Max is one of the better ones on the market with decent flexi properties due to fibre strand tech. Can level up to a depth of 80mm in one sitting and is ready to accept light foot traffic usually within 3 hours and largely depending on product depth, ambient and surface temperatures. Best of luck mate.