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Deck Mud Formula:
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Shower floor deck mud, also known as dry-pack mortar, is a mixture of sand, cement, and water used to create the sloped base for shower floors. It provides proper drainage toward the shower drain and supports the waterproofing membrane and tile installation.
The calculator uses a simple formula:
Where:
Explanation: The calculation provides the volume of deck mud needed in cubic feet, accounting for the sloped nature of the shower floor.
Details: Accurate calculation ensures you have enough material to create the proper slope for effective drainage while minimizing waste. Proper deck mud installation is crucial for preventing water damage and ensuring the longevity of your shower installation.
Tips: Measure your shower floor area accurately in square feet. Determine the average thickness needed for proper slope (typically 0.75-1.5 inches at the drain, increasing toward the edges). All values must be valid positive numbers.
Q1: What's the typical mix ratio for deck mud?
A: The standard mix is 4-5 parts sand to 1 part Portland cement, with just enough water to make it hold together when squeezed.
Q2: How much extra material should I account for?
A: It's recommended to add 10-15% to your calculated amount to account for compaction, waste, and irregularities in application.
Q3: What thickness should I use at the drain?
A: The minimum thickness at the drain should be at least 0.75 inches to provide proper support and prevent cracking.
Q4: How do I calculate the slope thickness?
A: Measure from the drain to the farthest corner, then calculate 1/4 inch of slope per foot of distance from the drain.
Q5: Can I use this calculator for other types of mortar beds?
A: While the calculation method is similar, different applications may require adjustments for specific requirements and compaction rates.