How Much Fall Should a Concrete Slab Have
Generally, Using 1/8-Inch Fall—Which Is 1-1/4 Inch per 10 Feet—Works Well on Larger Surfaces Like Driveways and Patios, but It Requires Good Screed, Bullfloat...
Generally, using 1/8-inch fall—which is 1-1/4 inch per 10 feet—works well on larger surfaces like driveways and patios, but it requires good screed, bullfloat, and finishing operations to minimize water puddling (birdbaths). For smaller surfaces, such as the treads on steps, use 1/4 inch/foot fall.
How much slope should a concrete slab have?
The standard slope for proper concrete drainage is a one-quarter inch drop for every foot of length.
How much slope is too much for a patio?
Many restaurants set up patios on existing sidewalks with a slope of 2% to a maximum of 5%, which supports the practice that the maximum slope of a patio is 5% or 5/8” per foot. Furniture sitting with the grade may not experience much from a 2% (1/4” per foot) patio grade at all.
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