What is falls and gradient in paving?

Falls (also called fall or gradient) is the planned downward slope incorporated into a paved surface to ensure water runs off efficiently rather than pooling. This slope is measured as a ratio, typically expressed as 1:40 or 1:50, meaning the surface drops 1 unit in height for every 40 or 50 units of horizontal distance. The exact ratio depends on the surface type and local drainage conditions.

For most paving work in Cheltenham, installers use a minimum fall of 1:40 on standard patios, driveways, and pathways. This gentle slope is barely noticeable to the eye but sufficient to move water away from the finished surface. Steeper gradients (1:25 or sharper) may be used on heavily trafficked commercial areas or where water pooling poses a safety risk.

Without adequate falls, standing water accelerates surface deterioration, creates safety hazards during wet weather, and can cause paving materials to crack or heave. Proper gradient planning also reduces pressure on underlying soakaway systems and prevents moisture damage to adjacent structures. Paving contractors in the area calculate required fall gradients during the design phase, accounting for the site's natural topography and existing drainage infrastructure. Achieving correct falls requires careful site preparation and precise leveling work, making it a key part of quality paving installation.