Chloe Zhang
Installing a plastic laminate countertop is a cost-effective way to upgrade your kitchen, bathroom, or laundry room. It is a popular choice for countertops because it is durable, lightweight, and easy to work with. It is also inexpensive and comes in a variety of colours, patterns, and edge treatments. With the right tools and techniques, installing a plastic laminate countertop can be a straightforward DIY project that can be completed in just under a day. This guide will take you through the steps to install a plastic laminate countertop, helping you achieve professional-looking results.
| Characteristics | Values |
|---|---|
| Cost | Cost-effective, inexpensive |
| Durability | Tough, durable, lightweight |
| Design | Hundreds of designs, patterns, and colours available |
| Installation | Requires the right tools, can be a DIY project, requires proper ventilation |
| Materials | Particleboard, laminate, contact adhesive, laminate roller, laminate trimmer, screws, wood glue, contact cement, etc. |
| Maintenance | Easy to maintain, clean with mild soap and water, avoid abrasive cleaners |
| Size | Standard size is 36" x 25" but can vary, cut to size |
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What You'll Learn
Preparing the surface
Firstly, ensure your workspace is clean and organised. Cover nearby surfaces and floors to protect them from adhesive and debris. Proper ventilation is crucial, as contact cement produces strong fumes. If you are using your old countertop as a template, ensure it is smooth by filling in any deep gouges. If you are creating a new shape, use 3/4-inch high-density particleboard for the base. Carefully inspect the particleboard surface and repair any blemishes.
Next, measure your cabinets and cut the required pieces for your countertop and backsplash. Cut the underlayment so it extends by about an inch beyond the finished ends of the cabinet, unless the cabinet is against an appliance, in which case you can make it flush. Cut a groove into the backsplash to allow for some wiggle room when installing the laminate. Install "raise strips" along the perimeter of the cabinets to ensure drawers can open freely, except where the underlayment corner seam will be.
Now, cut the particleboard to fit your countertop, adding a one-inch overhang to edges that aren't against a wall. Cut and glue strips of particleboard to line the underside of each edge. Screw these strips in place, ensuring the edges are perfectly flush. If connecting two countertop sections, size the strips accordingly for a tight fit. Sand the seam to correct any mismatches. To create an extremely tight seam, back-cut the end of one piece by tilting your circular saw blade to 5 degrees.
Before applying the laminate, ensure the underlayment and edges are free of debris and dust. Place 1/2-inch wood dowels every 6 to 12 inches on the countertop to keep the laminate from touching the surface while you position it. Set the laminate on the dowels, ensuring the back edge is flush with the back of the underlayment, and the front and sides overlap the underlayment edges. Starting from the middle, remove the dowels one by one, gently pressing the laminate in place as you work.
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Cutting the laminate
First, measure your cabinets and cut the required pieces to assemble your countertop and backsplash. Cut the underlayment so that it sticks out by about 1 inch past the finished ends of the cabinet, or make it flush if the cabinet is against an appliance. Cut a groove into the backsplash to give yourself some wiggle room when fitting the laminate.
Next, cut the laminate to size. For the large countertop piece, use a table saw with a carbide-tipped blade or a carbide-tipped laminate cutting tool. Make sure to measure the laminate pieces so they are slightly larger than needed, allowing for some excess that can be trimmed later. Use a straightedge to mark your cutting lines and cut along them.
For the edges, cut small strips of laminate using tin snips, also allowing for some excess. You can also use a circular saw to cut the basic rectangular shape of the countertop and a jigsaw for any curves or cutouts. Be very careful when handling the plastic laminate as it is brittle and can chip if not cut with sharp tools.
After cutting the laminate to size, you will need to trim the edges for a precise fit. Use a laminate trimmer to trim the laminate to the exact size and shape needed. Follow the manufacturer's instructions for the contact cement to adhere the laminate to the substrate, using dowels or strips of Venetian blinds to keep the laminate from touching the surface as you position it.
Finally, use a file to smooth out any rough edges. Buy a file specifically designed for plastic laminate and always file in a downward direction only. Remove any excess glue with a solvent recommended by the adhesive manufacturer.
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Gluing the laminate
Before gluing, ensure that the substrate or particleboard is smooth and free of debris and dust. Cut the particleboard to fit your countertop, adding a 1-inch overhang to edges that aren't abutting a wall. Cut strips of particleboard to line the underside of each edge, glue and screw them to the main sheet, and sand any mismatches to create a super-tight seam.
When gluing the laminate, start by rough-cutting the sheet laminate so that it is about 1 to 2 inches larger than the substrate. Apply contact cement or adhesive according to the manufacturer's instructions to both the substrate and the laminate. Let it dry for about 10 minutes or until it is dry to the touch.
Place the laminate on the substrate, ensuring that the back edge is flush with the back of the substrate and that the front and sides overlap. Starting from the middle, gradually remove any support or dowels you have in place, pressing down the laminate as you work. Use a roller or a scrap piece of wood wrapped in a rag to apply even pressure.
After gluing, use a laminate trimmer or a router with a laminate flush trimming bit to trim off the excess laminate. Use a file specifically designed for plastic laminate to smooth out any rough edges, always filing in a downward direction. Remove any excess glue with the recommended solvent, such as lacquer thinner, and clean off any excess contact cement with mineral spirits.
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Trimming the edges
First, prepare the laminate strips for the edges. Cut 2-inch wide strips of laminate, ensuring they are long enough to cover all the exposed edges of your countertop. It is recommended to cut them about 1 to 2 inches larger than the actual size of the edges. This extra length will provide a margin for a precise fit and allow for any adjustments. Use a straightedge to mark your cutting lines and tin snips to cut the strips. If you are using a laminate trimmer, set it up with a flush-cut bit, exposing the bit slightly more than the depth of the laminate.
Before adhering the laminate strips, apply contact adhesive or cement to both the particleboard and the laminate strips. Follow the manufacturer's instructions for the recommended drying time, usually around 10 minutes, until it feels dry to the touch. It is important to work carefully with contact cement as it dries quickly and forms an immediate bond. Ensure proper ventilation during this process as the fumes can be strong.
Now, it's time to attach the laminate strips. Get an assistant to help hold the strip at the correct height without touching the particle board. Start adhering from one end, ensuring overlap above and below the edge. Carefully press the strip onto the particle board, applying firm pressure with the heel of your hand. Repeat this process for all the exposed edges of your countertop.
Once the adhesive has dried, use your laminate trimmer to trim off any excess laminate. Follow the edge of the particleboard as a guide to ensure a precise cut. If there are hard-to-reach areas where the trimmer cannot access, use tin snips to cut away the excess laminate. Be cautious not to cut too close to the edge, as you can always trim a little more, but you can't add back the material once it's cut.
Finally, use a plastic laminate file to smooth out any rough edges and bevel the exposed edges of the laminate. Always file in a downward direction only, as filing back and forth can damage the laminate. Additionally, remove any excess contact cement with a recommended solvent, such as lacquer thinner or mineral spirits.
By following these steps, you will achieve a professional-looking finish on your plastic laminate countertop, ensuring the edges are trimmed neatly and securely.
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Sealing the countertop
Preparing the Countertop Surface:
Before applying any sealant, it is essential to prepare the laminate surface. Use an 80-grit piece of sandpaper to gently remove the sheen from the laminate. Be careful not to be too aggressive, as it may create uneven areas on the surface. Small circular motions are recommended to remove the shine evenly. This step is important to ensure that the sealant adheres well to the countertop.
Cleaning the Countertop:
After removing the sheen, the next step is to clean the laminate surface thoroughly. Use a degreaser or a mild cleaner, such as a mixture of 1 tablespoon of TSP (Tri-Sodium Phosphate) with 1 gallon of warm water. Rinse the countertop well and ensure that it is completely dry before proceeding to the sealing stage.
Choosing the Right Sealant:
There are various types of sealants available for laminate countertops, including resin, acrylic, and polyurethane coatings. Epoxy sealants are also commonly used, which come with liquid resin and a hardener that need to be mixed immediately before application. Acrylic sealants are a good option for smaller countertops in spaces like powder rooms or workspaces. Polyurethane coatings provide a glossy finish and offer a protective layer.
Applying the Sealant:
When applying the sealant, work in small batches, especially if using an epoxy sealant, as it will harden within 20 to 30 minutes of mixing. Pour the sealant onto the countertop, allowing it to flow to the edges. Use a paint stick or a wide putty knife to guide the sealant along the surface, ensuring an even application.
Sealing the Edges:
It is important to seal the edges of the countertop against walls or backsplashes. Use a premium siliconized kitchen and bath sealant for this purpose, such as DAP Kwik Seal Ultra. Apply painter's tape on the counter and the wall to create an even joint. Cut the nozzle of the sealant cartridge at a 45-degree angle and insert it into a caulk gun. Apply the sealant along the joint and smooth it with a caulk finishing tool or your gloved finger.
By following these steps and allowing adequate drying time, you will effectively seal your plastic laminate countertop, resulting in a durable and aesthetically pleasing finish.
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