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Kitchen Sink Base Cabinet

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Kitchen Sink Base Cabinet

A kitchen sink base cabinet is essentially a modified standard base cabinet without any shelves or drawers. As a result, this is one of the most simple units to build. A false front on the top of the face of the carcase is installed instead of a drawer because of the sink dropping down into the cabinet from the counter top. Once the cabinet is finished and installed, a set of cabinet doors can be built, finished and mounted onto the face frame.
kitchen sink base cabinet 1

Kitchen Sink Base Cabinet

Let’s face it—it’s easy to get water on the floor of your sink base cabinet. We’ll never understand why cabinetmakers use particleboard for the base, but they do. And once it starts swelling, your only option is to replace it. But you don’t have to cut out the entire bottom. Here’s an easier way to install a new sink base bottom.
kitchen sink base cabinet 2

Kitchen Sink Base Cabinet

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Kitchen Sink Base Cabinet

Time for some assembly. Place the left side of the cabinet onto the work table wit the dado facing upward, and put a bead of glue into the dado. You may wish to spread the glue with a brush across all surfaces of the dado for even distribution. Insert the 23-1/4 inch wide edge of the cabinet bottom into the dado, with the front of the bottom flush with the front edge of the cabinet side. Flip the assembly onto its side and drive a few finish nails through the side into the cabinet bottom to hold the bottom in place while the glue dries. Then, put glue into the dado on the other cabinet side, insert the cabinet bottom and attach the opposite side to the bottom with finish nails.
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Kitchen Sink Base Cabinet

Install a stacked dado blade set into on your table saw arbor with the correct number of chippers so that the blade set matches the thickness of your plywood (typically 23/32-inches). You could also use a radial arm saw for this task. Raise the blade to 3/8-inch above the surface of the saw table. Adjust the fence so that the near side of the blade is 4-inches from the fence, then place one of the cabinet sides flat on the table with the bottom edge (adjacent to the toe kick cutout) against the fence. Turn on the saw and cut a dado for the cabinet bottom 4-inches up from the bottom of the cabinet. Repeat with the other cabinet side, making sure that you dado the two edges that will face the center of the cabinet opening.
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Kitchen Sink Base Cabinet

Remove the drain lines (and garbage disposer, if there is one) to get maneuvering room. Then trace a cutting line about 3 in. in from all four edges. Then cut out the middle section of the swollen sink base with a jigsaw (Photo 1). Next, cut a piece of 1/2-in. plywood to the interior size of the sink base. Cut slots for the water supply tubes. Seal the edges and face of the plywood with urethane varnish. Then install the new plywood floor and fasten it to the old floor (Photo 2). Caulk around the edges and pipes to prevent water from seeping under the new floor. Finally, reattach the P-trap and garbage disposer.
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Kitchen Sink Base Cabinet

To install the cabinet, cut holes in the plywood backer to accommodate any plumbing, then slide the cabinet into place flush against the wall. Use a stud finder to locate any wall studs, then attach the cabinet to the wall with screws through the nailer block along the top back edge of the cabinet.
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Next, attach the 1/4-inch plywood back by slipping it into the two rabbets on the back edge of the cabinet. The top of the backer should align with the tops of the two cabinet sides evenly, so rack the assembly if the pieces don't match up perfectly. Attach the plywood back with finish nails into the sides and cabinet bottom.

Adjust the table saw fence to 23-1/4 inches from the near side of the blade, then place the remaining cut off section of plywood flat on the saw table with the 4-foot side against the fence. Rip the plywood and once again, set the cut off section aside, as you won't be needing the rest of this piece of plywood for this project. Reset the fence to 24 inches, place the short side of the piece you just ripped against the fence and cut the plywood. This should yield two pieces measuring 23-1/4 inches by 24 inches. One of these pieces will serve as the cabinet bottom, so set it aside with the two cabinet sides.
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Pull out the two cabinet sides and place them on a shop table. Using a combination square, measure up from the 24-inch wide bottom edge on one of the cabinets four inches, and place a pencil mark at that height 3-inches in from the front edge of the cabinet. Align the combination square against the bottom of the plywood and scribe a line from the bottom up to that mark, then reposition the square against the front edge 4-inches from the bottom and scribe a second line from the first line out to the front edge. This will mark a 4-inch tall by 3-inch deep cutout for your toe kick. Mark the second piece of plywood, then cut the two toe kick cutouts using a circular saw or a jig saw.
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Position a corner block in the front left corner of the cabinet, with one 4-inch side against the side of the cabinet and the other 4-inch side against the inner face of the face board, and tack the corner block into place. Repeat with the other three corner blocks.
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Defect on side that we worked withRating: Sturdy cabinet, wish it had matching lower front piece included because we used it as a stand-alone cabinet. We stained front piece to make it as close as possible with dark espresso stain, and it blends fine. There was also a very noticeable defect on the side – an area without color, we were able to hide that as well. show more
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Sturdy cabinet, wish it had matching lower front piece included because we used it as a stand-alone cabinet. We stained front piece to make it as close as possible with dark espresso stain, and it blends fine. There was also a very noticeable defect on the side – an area without color, we were able to hide that as well.
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Adjust your table saw blade to 24 inches, and cut the 4-foot side of the 35-1/4 inch piece of plywood in half. You should end up with two even pieces of plywood measuring 35-1/4 inches by 24 inches. These pieces will be the sides of your cabinet, which you should set aside for the moment.

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