1. What is Deck Slope Calculation?

Deck slope calculation determines the gradient or incline of a deck surface, typically expressed as a percentage. Proper slope is essential for water drainage and preventing water accumulation on deck surfaces.

2. How Does the Calculator Work?

The calculator uses the slope formula:

Where:

• \( Rise \) — Vertical height difference (in meters)
• \( Run \) — Horizontal distance (in meters)

Explanation: The formula calculates the slope percentage by dividing the vertical rise by the horizontal run and multiplying by 100 to convert to a percentage.

3. Importance of Proper Deck Slope

Details: Proper deck slope is crucial for preventing water pooling, reducing slip hazards, preventing wood rot, and ensuring long-term structural integrity of the deck.

4. Using the Calculator

Tips: Enter the vertical rise and horizontal run measurements in meters. Both values must be positive numbers, with run greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the recommended slope for deck drainage in the UK?
A: Typically 1:80 to 1:40 slope (1.25% to 2.5%) is recommended for proper water runoff.

Q2: How do I measure rise and run for my deck?
A: Rise is the vertical difference between the highest and lowest points. Run is the horizontal distance between these points.

Q3: Can I use different units of measurement?
A: This calculator uses meters, but you can use any unit as long as both measurements use the same unit.

Q4: What slope is too steep for a deck?
A: Slopes greater than 5% may be uncomfortable for walking and furniture placement, though specific requirements vary by local regulations.

Q5: Does this calculation work for composite decking?
A: Yes, the slope calculation is the same regardless of decking material, though installation requirements may vary.