Large-format tile (anything with an edge over 15", plus all the 24x48 and slab formats) is in demand — and it punishes the wrong tools. Here's the large-format tile kit pros rely on.
1. A flat substrate (non-negotiable)
LFT shows every dip. Industry guidance calls for no more than 1/8" deviation over 10 feet. Self-leveling underlayment or a proper float coat comes first — no tool fixes a wavy floor.
2. A leveling system
On large format a tile leveling system isn't optional — clips and wedges hold adjacent tiles flush while the mortar cures and all but eliminate lippage callbacks.
3. The right trowel and technique
Use a large-notch trowel (1/2" x 1/2" or larger, or a euro-notch) to get full mortar coverage, and back-butter every tile. The goal is 90%+ coverage — voids under big tiles become cracks later. A beating block and rubber mallet seat the tile evenly.
4. LHT / large-format mortar
Standard thinset slumps under a big tile. Use a large-and-heavy-tile (LHT) mortar that holds the tile without sinking and supports non-sag on walls.
5. Handling and transport
Big tiles crack from mishandling. Suction cups and a two-person carry frame let you place tiles precisely without flexing them. For slabs, a transport/installation frame is worth it.
6. A cutter that can handle the size
Make sure your rail cutter or wet saw has the capacity for your tile plus diagonal cuts — see our RUBI tile cutter buying guide. For 24x48 and up, a large-capacity bridge saw or a dedicated LFT cutting system pays for itself.
FAQ
What size trowel for large-format tile? Generally 1/2" x 1/2" or larger notch, plus back-buttering, to hit 90%+ coverage.
Do I really need a leveling system for LFT? Yes — it's the single best defense against lippage on big tiles.
What mortar should I use? A large-and-heavy-tile (LHT) / large-format mortar that won't slump under the tile's weight.
Kitting out for LFT jobs? Get the full setup at contractor pricing and earn points with the PlaceForPros Pro Program. Shop large-format tile tools →