Installation Instructions - Hidden Granite Countertop Flat Bracket

Invisible support for granite, quartz, stone, and wood countertop overhangs on knee walls, pony walls, and raised bars - recessed into the wall cap so nothing shows.

Installation

This guide walks you through installing your Hidden Granite Countertop Flat Brackets with clarity and confidence. Each step is clearly outlined with the tips and safety notes you need for a secure, professional installation — whether you're a seasoned contractor or tackling this as a DIY project. Before you begin, review all the steps and double-check that you have the necessary tools and fasteners.

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What's Included

• 1x Hidden Granite Countertop Flat Bracket
• 4x #14 x 2½" Phillips Flat Head Wood Screws

Safety Information

• Use the correct tools.
• Wear protective eye wear and proper safety equipment.
• When using tools or modifying anything, follow the manufacturer's instructions and user manuals.
• Always use common sense and follow good construction practices.
• Consult a professional for load-bearing applications or if you are unsure about your substrate.
• Always mount brackets to a structure able to support the brackets and the weight that may be applied to them.
• Any use of this product other than its intended use is not recommended.

Full Product Details

Specifications, sizing and quantity tables, videos, and every product document live on the product page.

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(1) Gloves  (2) Safety Glasses  (3) Measuring Tape  (4) Pencil  (5) Bubble Level  (6) Phillips Screwdriver  (7) Mallet  (8) 1" Chisel  (9) Drill with 9/64" Bit  (10) Hand Saw  (11) Caulking Gun  (12) Hand Router with ½" Top-Bearing Flush Trim Bit (optional)

STEP 1Mark Bracket Positions

Measure and mark the bracket positions along the cap of your knee wall or pony wall. Start 4–6" in from each end of the countertop, then space the remaining brackets evenly between 16" and 24" apart.

WARNING — Spacing carries the rating. Brackets must be spaced 16"–24" on center. Wider spacing voids the rated working load.

Tip: Mark the full bracket outline, not just the center line — you’ll cut to these lines in Step 2.

STEP 2Cut the Mounting Channel

Create a ½" deep recessed channel for each bracket so it sits flush with the top of the wall. Power tools: use a hand router with a top-bearing flush trim bit set to ½" and remove the marked area. Manual tools: cut along the marked lines with a hand saw to a depth of ½", then remove the material between the cuts with a 1" wood chisel and mallet.

Check the channel: It must be flat, clean, and level so the bracket seats fully. Any high spot becomes a rock point under the countertop.

STEP 3Install the Bracket

Place the bracket into the channel and align it. Secure it with all 4 included #14 x 2½" Phillips Flat Head Wood Screws driven through the countersunk holes into the wall cap.

WARNING — Anchoring carries the rating. All 4 screws must be fully engaged in solid wood — the wall cap over continuous solid blocking or double-stud framing. When fastening into studs, angle (“toe”) the screws into the stud so every screw bites; if toeing isn’t possible, align the bracket so at least one top and one bottom screw are fully engaged. Metal studs must be blocked with wood. Never rely on drywall or sheathing alone.

Pre-drill: Use a 9/64" bit to pre-drill each hole. This prevents the cap from splitting and lets the #14 screws seat fully.

STEP 4Check for Level

Use a bubble level to confirm each bracket is level and flush with the cabinetry. If a bracket is off, loosen the screws slightly, shim as needed, and re-tighten. Every bracket across the span should sit at the same height — an uneven bracket creates a stress point on the countertop.

STEP 5Apply Adhesive

Before setting the countertop, run a bead of construction-grade silicone adhesive down the center of each bracket’s top face. The adhesive keeps the top from shifting and dampens vibration. Use a silicone rated for your countertop material.

STEP 6Place the Countertop

Carefully lower the countertop onto the brackets with even overhang on all sides. Confirm it sits level, then allow the adhesive to cure per the manufacturer’s instructions (typically 24 hours) before applying heavy loads.

Mounting surface. These brackets are engineered to support significant loads but must be properly installed to perform safely. The wall cap must be backed by continuous solid blocking or double-stud construction so every fastener is fully embedded in solid wood. Do not over-tighten or strip the screws. For metal studs, reinforce by piggybacking a wood stud or inserting wood into the C-channel.

Spacing. Maintain 16"–24" on center. Bracket spacing depends on the weight being supported and the countertop material — different materials have different span strengths, so consult your countertop supplier if you are unsure.

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