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Installations Guide for Installing Granite Brackets

Step by Step Instructions on How to Install Granite Brackets

Measurements and details about the brackets

Click Here for the Granite Bracket Calculator

The Granite Bracket Countertop Calculator Tool will help you figure out how many Countertop Granite Brackets you will need.


floating countertop

Floating Countertop shows the brackets spread out about 16 inches on a base cabinet.

Routing and Measuring the Placement of Your Bracket

Use your granite bracket to measure out the space you will need to cut out from the surface you are mounting the bracket to – Mark it with a pencil.

The granite bracket can be used as sort of “template” to mark where you’ll need to cut or mark the structure you will be installing the bracket. Installers like to place the bracket flat down on the surface and mark the surface of the structure on the outer sides of the bracket and then come back with a speed square and mark it as their cut guide.

The first bracket will need to be set in 15 inches from the corner of the knee wall or the corner of the cabinet. Brackets will be placed 16 inches apart to match up with the studs in walls and is the recommended spacing for 3cm granite. Remember that studs run 16″ in a wall so if you’re using an Inside Wall Mount Granite Bracket it works out perfectly.

Measure and mark the appropriate mounting locations on the cap of your knee wall or the supporting structure in or on the cabinet. If you plan on using a base cabinet as an island your installer will need to build a supporting structure along the inside of the cabinet to attach the bracket to. We see a lot of installers use a 1X4 piece of wood fastened to the inside of the cabinet. Remember to keep the “Support Structure” level to the top of the cabinet. Many installer use a corner brace under the 1×4 “Support Structure” and even add a bit of Gorilla Construction Adhesive to finish it up so it’s as tough as nails.


Adding a support structure is advised on island cabinets.


To insure the brackets are squared installers use a speed square, to mark a horizontal line at each mounting location with a pencil or marker. It’s important to have the brackets completely square for the best countertop overhang support.

Use Speed Square

Use Speed Square is to mark square lines at precisely 90 degrees to the board’s edge.

Using a 6 in. fixed jab saw to cut along each line you marked with the speed square and pencil to a depth of ½” or 1/4″ depending on the depth of the bracket you are using.

6 in. Fixed Jab Saw

Use a 6 in. Fixed Jab Saw, cut along each line to a depth of ½ inch.

Use a top bearing flush trim router bit with a 1/2″ or 1/4″ deep cutting depth or use a wood chisel and fashion a mounting channel. Don’t forget to trim the excess wood out of the mounting channel. This should leave you with a clean, even channel for the granite bracket to be seated in.

Hinge Mortising Router Bit with 1/2-Inch

Hinge Mortising Router Bit with 1/2-Inch


Place the bracket into the mounting channel that you just made and affix the bracket to the cap or extra support structure in the cabinet or knee wall using the included #12 x 3/4 in. Stainless Steel Phillips Flat-Head Wood Screws. Some installers also cover the supporting top face of the bracket with Gorilla Construction Adhesive for extra strength if deemed necessary.


Use a level laterally across the top of the brackets to insure they are equally level as you screw the bracket into place. Installers use wooden shims that are carefully tapped into the space between the between the bracket and the front face of the mounting channel.


Notes from the installers:

Brackets that have side or back flanges attached to them also need a mounting channel to rest in. Use wooden shims to get a snug fit between the granite and the top supporting arm of the Granite Bracket.

Be sure your knee wall or support structure in a cabinet is well built and stable.

We recommend pre-drilling all screw holes to prevent cracking support studs or support lumber in cabinet installs. Though we off-set the screw hole positions to help avoid splits, pre-drilling is a good idea.


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