KitchenAid undermount Sinks Create sink support, Cut out countertop, Install undermount sink

Create sink support

1. Prepare minimum 1/2” plywood sheet (sink support) by cutting to dimensions of cabinet it will be mounted to.

2. Secure 1/2” plywood sheet (sink support) to work surface using various clamps. Fasten the female template (plywood) to the 1/2” plywood sheet (sink support). Using the 1-3/16” router guide bushing and the 1/2” straight cutter bit, cut opening in the 1/2” plywood sheet (sink support). Do not remove the female template from the sink support.

3. Using the 1/4” straight cutter bit, recess the opening in the sink support by .050” to .060”, to accept flange of sink. (As shown in Figure 2).

NOTE: For reference, 1/16” is .0625”.

	Sink
	.050” / .060”
1/2” plywood
reinforcement	Section Detail
sheet
Figure 2

4.Remove the female template and set aside.

Cut out countertop

IMPORTANT: All solid surfaces (such as marble and granite) must be cut by a qualified installer or fabricator.

1. Clamp 1/2” plywood female template on top surface of countertop, in desired position. This position will be determined by the relationship of the sink rim to cabinet gables, cabinet supporting members, and deck mounted fittings.

2. Cut out countertop by tracing edge of female template, using the 1-3/16” router guide bushing and the 1/2” straight cutter bit.

3. Finish cut-out edge of countertop with desired finishing techniques.

Install undermount sink

1. Clean flange and rim of sink, and countertop mating surface (underside of countertop) with solvent such as denatured alcohol.

2. Set sink in sink support cutout.

3. Generously apply a continuous silicone bead around the sink rim. (Dow Corning® 786 recommended.)

4. Liberally apply silicone dabs on plywood sink support at least 2” back from the sink cut-out. (See Figure 3.)

Silicone

dabs

Silicone

Section Detail

Figure 3

5. Align sink to underside of countertop cut-out so that a uniform sink edge is visible from the topside of the countertop around the periphery of the cut-out.

IMPORTANT: You cannot make any adjustments after performing Step 6, following:

6. Clamp sink support and sink rim to countertop. Use a non-abrasive cloth and solvent to remove excess silicone that has been squeezed out beyond the cut-out edge. Do not use any metal implements that will scratch the sink. Keep clamps on for a minimum of 24 hours before installing in cabinet.

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