Custom Building Products - Premium Notch Trowels
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- Heavy-gauge steel construction keeps the notch profile accurate under the pressure of large-format tile and stone — no blade deflection that would starve the mortar bed.
- Available in multiple notch sizes to match mortar coverage requirements for large-format tile and stone, ensuring full adhesion on heavy slabs that demand 95%+ back coverage.
- Three trowel sizes cover the range from standard field tile through oversized porcelain slabs — select the notch that matches the tile size and mortar manufacturer's specification.
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Description
Description
The trowel you use determines the coverage you get, and coverage determines whether your tile installation holds up or fails over time. Under-troweled tile — where mortar doesn't fully support the tile back — is the #1 cause of tiles cracking in service.
Custom Building Products' premium notch trowels are precision-ground for consistent notch depth and spacing. The quality steel holds its edge through repeated cleaning rather than dulling and deforming over a job.
Trowel size basics
- 1/4" × 3/8" V-notch: small tile, mosaics, wall tile
- 3/8" × 3/8" square notch: 4"–16" floor tile (most common residential)
- 1/2" × 1/2" square notch: 12"×24" and larger format tile
- 3/4" square notch: very large format (24"×24" and up) — often combined with back-buttering
Pro Tip: For large format tile (anything 18"+ in either dimension), use the next trowel size up from what you think you need. The mortar collapses about 50% when tile is pressed into it. The TCNA standard for wall installations is 80% coverage; floors should be 95%.
Clean your trowel while the mortar is still wet — hardened thinset on a trowel destroys the notch profile.
Ships from Canadian warehouses. Earn 3% rewards on every order at YourFloors.ca.
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