Patio Fall Ratio Calculator

Introduction

Patio construction involves various crucial factors, but one that’s often overlooked is the Patio Fall Ratio. This ratio determines the slope or incline of your patio, directly influencing water drainage and overall functionality. In this article, we will delve into what the Patio Fall Ratio is, how to calculate it, and why it’s essential for your construction projects.

Formula

The formula for calculating the Patio Fall Ratio (PATR) is surprisingly straightforward:

P A TR = D / W

$D$ = Patio Vertical Drop (in inches)
$W$ = Patio Width (in inches)

By calculating this ratio, you can easily determine the angle of slope required to achieve optimal water drainage on your patio.

How to Use

To effectively use the Patio Fall Ratio formula:

Measure the Patio: Determine the vertical drop and width of your patio area.
Apply the Formula: Use the formula $W/ D$ to find the ratio.
Review the Result: The resulting ratio will guide you on the slope needed for effective water drainage.

Example

Suppose you have a patio area with a vertical drop of 2 inches and a width of 10 inches. To find the Patio Fall Ratio, you would use the formula:

This ratio means that for every 10 inches of width, there should be a 0.2-inch vertical drop for optimal water drainage.

FAQs

Q: What is the ideal Patio Fall Ratio?

The ideal ratio varies depending on your specific needs and local climate, but a common guideline is between 1:60 and 1:80.

Q: Can I use the same formula for decks?

This formula is specifically designed for patios, but the principle can be adapted for decks, keeping in mind the material differences.

Q: Does the formula work for any patio shape?

The formula is most effective for rectangular or square patios. For irregular shapes, you may need a more complex calculation.

Conclusion

Understanding and applying the Patio Fall Ratio is essential for any successful patio construction project. It ensures effective water drainage, enhances the functionality, and prolongs the lifespan of your patio. By utilizing the simple formula $W/ D$ , you can optimize your patio’s slope and make informed construction decisions.

Result: