How Much Fall Should A Patio Have Per Meter

How Much Fall Should A Patio Have Per Meter?

When installing a patio, it's important to ensure proper drainage to prevent water pooling and potential damage to the surface or surrounding areas. One crucial aspect to consider is the fall or slope of the patio, which determines how effectively water drains away.

The recommended fall for a patio is typically between 1% and 2%. This means that for every meter of horizontal distance, the patio should slope downwards by 10 to 20 millimeters. This slight slope is enough to promote efficient water drainage without creating a noticeable incline.

Several factors can influence the optimal fall for a patio, including the type of surface material, local rainfall patterns, and the presence of surrounding structures or landscaping.

Surface Material: Different surface materials have varying water absorption and drainage rates. For example, concrete patios may require a slightly greater fall than permeable pavers, which allow water to seep through the gaps.

Rainfall Patterns: In areas with heavy or frequent rainfall, a steeper fall may be necessary to ensure adequate drainage. A greater slope helps water drain away more quickly, preventing it from pooling on the patio.

Surrounding Structures and Landscaping: The presence of nearby structures or landscaping can affect the direction of water flow. If the patio is adjacent to a wall or planter, the fall should be directed away from these features to prevent water buildup.

It's worth noting that excessive fall can create tripping hazards or make the patio difficult to navigate, especially for individuals with mobility issues. Therefore, it's important to strike a balance between promoting proper drainage and maintaining a safe and accessible outdoor space.

Consequences of Improper Fall:

Water pooling on the patio, leading to stains, damage to the surface, and potential slipping hazards.
Water seeping into the soil beneath the patio, potentially weakening the foundation and causing structural issues.
Excess water flowing off the patio onto surrounding areas, creating drainage problems and potential damage to adjacent surfaces.

Conclusion:

Determining the appropriate fall for a patio is crucial for ensuring proper drainage and preventing potential problems. By considering factors such as surface material, rainfall patterns, and surrounding structures, you can establish an optimal slope that promotes water flow without compromising safety or aesthetics. If you're unsure about the ideal fall for your patio, it's advisable to consult with a landscape professional or contractor for guidance.