Product ID: TDS-455
CustomBlend LHT Large and Heavy Tile Mortar offers a non-sag and non-slump solution for most interior and exterior, wall and floor applications. This polymer modified mortar can be applied ¾” (19mm) thick on horizontal surfaces and can be used for large format porcelain, ceramic and natural stone tile. CustomBlend LHT meets ANSI A118.4HT and A118.11.
SQUARE FOOT COVERAGE PER 44 LB BAG (SQUARE METER PER 20 KG)
| Trowel Size | Min Coverage | Max Coverage |
| Longest side of tile 8" to 15" use 1/4" x 1/4" x 1/4" (6 x 6 x 6 mm) Square-Notch | 75 ft² (6.9 M²) | 86 ft² (7.99 M²) |
| Longest side of tile 8" to 15" use 1/4" x 3/8" x 1/4" (6 x 9.5 x 6 mm) Square-Notch | 53 ft² (4.9 M²) | 62 ft² (5.76 M²) |
| Longest side of tile more than 15"+ use 1/2" x 1/2" x 1/2" (13 x 13 x 13 mm) Square-Notch | 37 ft² (3.4 M²) | 43 ft² (3.99 M²) |
| Longest side of tile more than 15"+ use 3/4" × 9/16" × 3/8" (19 × 14 × 9.5 mm) U-Notch | 30 ft² (2.8 M²) | 33 ft² (3.1 M²) |
Recommended minimum coverage (80% for dry areas and 95% for wet areas and exteriors). Flat back-troweling (formerly backbuttering) may be necessary.
Chart for estimating purposes. Coverage may vary based on installation practices and jobsite conditions. For more sizes, use the material calculator at CustomBuildingProducts.com or contact CUSTOM Technical Services at 800-282-8786.
Note that mortar coverage does not include flat back-troweling and/or notch back-troweling tiles. When back troweling, consider the tile underside pattern and depth to estimate thickness and usage to add to your estimate. The National Tile Contractors Association / Reference Manual has additional details regarding flat back troweling See Flat & Notch Back-troweling at https://www.tile-assn.com/page/refmanual.