According to the marble institute of america you can safely overhang granite that is 1 1 4 thick up to 10 without supports.
Marble countertop overhang.
The standard overhang for kitchen island countertops is 12 inches.
While some countertops may have different overhang measurements this is the number that is seen as standard for homes.
It serves as a protection for the drawers from crumbs spills and other mishaps that may fall from the countertop surface.
However the cantilevered portion cannot be more than 1 3 the total width of the countertop.
However as with regular countertops custom kitchen islands may have different overhang measurements.
However they must make sure that the countertop will support the weight of the stone especially at the point of the overhang.
Standard countertop overhang is 1 inches.
3 8 inch countertop overhang on a cultured marble counter and sink.
While this is a small overhang it matches very well with the modern shaker style while still providing some protective measure against spills.
Ther countertop overhang is the part of the countertop that extends to cover the drawers and cabinets below.
So we are ok on the first criteria but we exceed the 1 3 criteria by four inches.
Shop our countertop supports.
Keep in mind that this is 1 inches over the front edge of the base cabinet.
For example unsupported countertops with an overhang over four inches can sag and potentially fall which can lead to property or bodily damage.
Even leaving your brackets weakly fastened leads to inadequate countertop support.
However there are many factors that might change this.
The standard countertop overhang is 1 1 2 inches.
Additional thoughts for a larger countertop overhang.
Many people like to create an overhang on their marble quartz or granite countertops to provide them with extra counter space.
Alternatively a weak bracket may not support the weight of the countertop overhang.
Hidden support brackets for granite marble quartz silestone corian zodiaq recycled glass concrete and butcherblock countertops.