Asked by: Man Gobbo
home and garden home appliances

How much overhang can a granite countertop have without support?

Last Updated: 24th May, 2020

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Granite Overhang Limits Per Experts
According to the Marble Institute of America, you can safely overhang granite that is 1- 1/4″ thick up to 10″ without supports. However, the cantilevered portion cannot be more than 1/3 the total width of the countertop.

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Subsequently, one may also ask, how do you support a granite countertop overhang?

These overhangs have to be supported by steel braces placed under the countertop and then screwed into the wooden studs in the knee wall. Any granite countertops with more than an 8” overhang should be adequately supported by steel braces.

Also, how much overhang should a kitchen island have without support? Different countertop materials have different requirements. Solid Surface countertops can overhang 6 inches without additional support (e.g. plywood decking). 3 cm Quartz (engineered stone) can handle a 14 inch overhangs and 3 cm Granite overhangs should not exceed a 10 inch overhang without additional support.

Considering this, how much support does granite countertop need?

Granite thickness – granite tops with a thickness of 3 cm can have an 8-10 inch overhang without additional supports. If your granite top has a 2 cm thickness, we recommend attaching a support system should the overhang exceed 6 inches.

How much should a countertop overhang?

The overhang for a countertop mounted in this fashion should be 18 inches to allow adequate knee-room when you sit at the countertop in a standard dining chair. For countertops used with a counter-height stool, you need a countertop height of 36 inches. The overhang need not be more than 15 inches on these countertops.

Related Question Answers

Dorian Sporhase

Professional

What is the normal overhang for granite?

Remember, the amount of overhang directly correlates to how much legroom you'll have while seated. The typical overhang is 12 in., but some people choose to extend their granite countertops further than that.

Varinia Wettstein

Professional

How do you support a dishwasher with a granite countertop?

Granite Underlayment
This underlayment is a support made of either plywood or particleboard, which is laid across the top of the dishwasher, under the interior of the tops of the cabinets. Then the installer glues the granite counter with silicone onto the underlayment, as well as any front framework of the cabinets.

Shoshana Gansser

Professional

Are my cabinets strong enough for granite?

Particle board cabinet boxes are strong enough to handle granite so they is no need for any concern here. The gap between cabinets where the dishwasher resides need only to have 3/4" plywood. Thus the need for 3/4" plywood placed over all the counter tops is best as I described in the earlier posting.

Mallory Ferrandez

Explainer

Do granite countertops need a plywood base?

When installing granite countertops, you will not need an underlayment of plywood if the granite has a thickness of 3 centimeters (about 1 1/4 inches). However, for granite with a thickness of 2 centimeters (about 3/4 inches), you will definitely need to use plywood for support.

Bienbenida Ableuhov

Explainer

Does granite bar need support?

Quartz countertops often do not need support. Granite supports can be either functional, decorative, or both depending on your granite countertop installation. And unlike laminate countertops that do not require supports, natural stone countertops require some thought and understanding of why and how they will be used.

Sarbjit Uggetti

Explainer

How much should a counter overhang for stools?

Stools for raised 42-inch countertops are usually between 28 and 30 inches tall, giving a comfortable 12 to 14 inches of knee room. The recommended counter overhang also varies with the counter height, with experts suggesting 15 to 18 inches for the lower counter and 12 inches for a raised counter.

Giga Aguza

Pundit

How is a granite countertop attached?

glue granite countertops down
With others helping, lift the granite and put half-dollar dollops of silicone around the perimeter of the cabinets (space about every 6" to 12"). Place a bead of caulk around the sink rim. Apply second bead on top of sink rim to waterproof the gap between the sink and the countertop.

Kim Hagi

Pundit

How many countertop brackets do I need?

Countertop supports should be set 3” to 4” back from the front edge of the countertop to insure they are hidden from view. So 20 inches – 4 inches = 16 inch brackets. If your pony wall is made from 2 x 6s then be sure to adjust your size to accommodate the extra 2 inches.

Aleksejs Turck

Pundit

Can I sit on my granite countertop?

Do Not Sit Or Stand On Your Countertops
Unlike laminate countertops, granite countertops are very hard, but they are not flexible and do not have plywood backing. Too much weight in one spot could cause a crack.

Maodo Rettich

Pundit

What size corbel do I need for granite?

How many corbels do I need? A general rule for granite is no more than 30 unsupported inches in length (span.) Keep in mind that a seated person requires about 24" of space, side-to-side. So, it's wise to place your corbels to the sides of your "parked" stools.

Damarys Golotik

Teacher

Can you replace cabinets and keep granite?

Here are some of the benefits of cabinet refacing—the only cabinet "replacement" option that is guaranteed to preserve your granite slab intact! Your existing cabinets will be reinforced. This will leave your "new" cabinets as strong—or stronger—as fully custom cabinet options. You can have any look you want.

Ora Croado

Teacher

Can a dishwasher support a countertop?

Countertop Support Over a Dishwasher. Now, for a normal drop-in or under mount sink this wouldn't be an issue, as most manufacturers state that the countertops can run a 24" span without needing support.

Meliton Hattebier

Reviewer

How far can you cantilever granite countertop?

The Marble Institute of American says you can safely extend unsupported granite up to ten inches (for 1-14 inch thick slabs) where the cantilevered portion is no more than 1/3 the total width of the countertop.

Tao Haberstock

Reviewer

How much overhang should a kitchen island have?

Hanging Out on an Island
The standard overhang of an island countertop -- on the side designed to sit at and tuck stools underneath -- is 12 inches. If you plan to extend the counter farther, you need to add supports such as legs, or wood corbels or metal L-brackets that extend half the overhang's distance.

Alberico Bleibohm

Reviewer

How far can granite overhang Island?

The standard overhang for granite countertops is 1 ½ inches (12 inches for an island), just like the standards in general. Can You Extend the Overhang on a Kitchen Island Countertop? Yes, you can extend the overhang on a kitchen island countertop. However, you may need to install supports such as corbels or legs.

Yizhong Azpiazu

Reviewer

How much overhang is needed for a breakfast bar?

If you're doing a breakfast bar on the outside rather than storage, they are only one set of cabinets deep, but the bar will have 12-18 inches of overhang. Please keep in mind you'll need to add extra space for any trim.

Yoel Maidagan

Supporter

How do you support a granite countertop overhang on an island?

As a granite support guide, in designs where your countertop spans supports, the length of the span (side to side as your facing it) should be 16 to 20 inches. For designs where your countertop is cantilevered or overhangs the supports, overhanging portion should be limited to 2 to 3 inches from the outer edge.

Evgeniy Juncadella

Supporter

How do you support a countertop overhang?

Do's of Countertop Supports
  1. Ensure your supporting structure is sufficient for holding your countertop and supporting brackets or corbels.
  2. Use a countertop support that extends to within 4 inches of edge of your countertop.
  3. Fasten your supports to the most substantial support available.

Nicandro Rementsov

Supporter

How do you support the island overhang?

Solid surface tops that are ½” thick that extend beyond the cabinets by six inches or more need overhang support. Overhangs like those found on a wall pass through, and eating bars of more than 6”, but less than 12”, can be supported with wood or metal corbels.