Tile Shower Pan Slope, Mortar Bed & Pan Liner Calculator
Calculate shower pan pre-slope mortar bed thickness (1/4" per foot per TCNA B415 / ANSI A108.1A), dry-pack deck mud bags (4:1 sand-to-cement), waterproof pan liner membrane dimensions with 3" vertical turn-ups, and curb volume.
Shower Pan & Drain Geometry
Inches
Inches
Inches
Distance from left wall to center of drain.
Inches
Distance from back wall to center of drain.
Total Deck Mud Required
TCNA 1/4" / FT SLOPE PASS
6 Bags (50 lb)
Total 2.06 cu ft dry-pack mortar (~258 lbs dry mix)
Perimeter Rim Height
1.88 in
At furthest corner (30.0 in away)
Pan Liner Membrane Size
20.0 sq ft
4.0 ft x 5.0 ft sheet (6" turn-ups)
Installation Specifications
Drain Throat Base Thickness:
1.25 inches
Curb Mortar Volume:
0.50 cu ft (1.3 bags)
Weep Hole Protection:
1 handful 1/4" pea gravel / weep spacers