Install undermount sink marble

Put a bead of silicone caulking around the rim of the sink using the caulking gun. Place the sink back into the hole in the granite and pull it up into place using a string wrapped through the drain. Although several methods are used to install undermount sinks, many professionals can safely glue the sink in place using silicone sealant and a two-part epoxy. This eliminates the need to drill holes into the bottom of the countertop to support studs, which could weaken the stone and cause it to crack or break.

Epoxy glue is the most common type of glue used in granite installations, as it is one of the few types of adhesives that can provide a bond that is as strong as the stone itself. No, caulk is not to be used as the adhesive to hold the sink to the stone. Most undermount sinks come with very clear written installation instructions. Every set of instruction I have seen calls for a bead of clear silicone caulk to be placed around the flat lip of the undermount sink.

Most undermount sink manufacturers recommend that you use pure, percent silicone sealant for undermount sink installation. Silicone sealants are designed for resilient flexibility and have good adhesive properties. If an ordinary caulk was used to seal the sink, it likely will fail quickly. Affix the Countertops Apply small beads of silicone along the perimeter of the plywood, leaving about 10 inches between each bead.

To add waterproofing around the sink, apply caulk around the rim. Order Reprints. Stone fabricators are employing a range of techniques for installing undermount sinks, although there are some common products and methods being utilized. Bridging the past and future of Bluestone. Reviving a classic quarry. You will be able to slightly loosen or tighten clips at any time without much of a hassle.

Using clamps will make the undermount sink installation much easier. This way, adjusting the position of your countertop will become much simpler for you.

Using a sealant is crucial for an undermount kitchen sink installation, as it will ensure the stability of the whole construction. We recommend using a silicone sealant, not only for its durability, but also for its water resistance. Measure the sink opening in your granite countertop. Normally, it will be 33 X 22 inches from outside the rims. Step 2 Choose a reveal style for your sink. Your choice of a reveal style should be based mostly on your preference but most people will go with the zero reveal.

This type of reveal looks professional and leaves minimal space for dirt, grease, and germs to slip into. Step 3 Center the sink to the opening on the countertop carefully. With the undermount sink in place, mark the potions where the holes need to be drilled on the countertop.

Take the sink out, and use a drill to put holes in the marked spots. Then clean the ridge with denatured alcohol and allow it to dry. Next is to apply a thin layer of sealant to the sink lip and place the sink in from underneath. Adjust it into position under the granite. Be sure to use clear caulking when working on your granite countertop especially if the stone is dark in color.

This will give it a cleaner and more professional appearance once the project is done. Step 5 Insert the wingnuts into the available screw heads and make sure the nuts are tight. Wait for a few days for everything to set before installing the fittings.

Remember to caulk around all threaded connections to create a waterproof seal. Step 7 To ensure a tight seal, apply pressure on the sink from the top around the edges with your hands and press out any trapped air. Method 2. Stack boards underneath the countertop to hold up the sink. Many undermount sinks need to be lifted into position underneath a countertop. Center the sink in the middle of the hole in the countertop. Adjust the sink and the wood supports as needed.

Align the rim of the sink with the cut edges of the countertop if you're going for a zero reveal aesthetic. Look down from above to make sure the sink is exactly where you want it.

Make sure it is even on all sides. Clamp the sink to supports to hold it in place while you install it. Set a piece of wood underneath the sink, then set another piece over the hole in the countertop. Pull the drain stopper out of the sink and lower the adjustable clamp through the drain. Clamp the boards so the sink stays suspended about 1 in 2. Run a clamp through each drain.

Another way to do this is with an undermount sink harness. The harness clips to the sides of the countertop. You then tighten the harness to lift the sink into place. Glue the studs to the underside of the counter with an epoxy paste. Get some undermount sink clips along with a bottle each of epoxy resin and hardener. Mix equal amounts of the resin and hardener together with a wooden stirring stick. To install the studs, hold them to the countertop and spread glue over them with the stirring stick.

Keep them no more than 10 in 25 cm apart. Spread silicone caulk around the countertop. Cut the tip off a canister of caulk and set it in a caulk gun. The bead of caulk needs to be above the rim of the sink. Choose a canister of a waterproof silicone caulk from a hardware store. This kind of adhesive holds undermount sinks in place long-term. Tighten the clamps to bring the sink up to the countertop.

Tightening the clamps raises the sink so it presses against the caulk. Adjust it before the caulk solidifies. Once the caulk solidifies, moving the sink becomes much more difficult. Install the sink clips and wingnuts over the glued studs. Fit a clip over a stud, then tighten it in place with a wingnut. Twist the wingnuts clockwise to tighten them. When the sink clips are installed correctly, they secure the sink tightly to the countertop.

If you notice a gap, the clips may not be on tight enough. Always tighten the wingnuts by hand. Overtightening them can damage the countertop. Wipe away excess caulk with a rag and denatured alcohol. Pushing the sink against the countertop may cause some of the caulk to squeeze out. Wipe it up right away to prevent it from hardening. If it begins to harden, dampen a rag with some of the denatured alcohol, then use it to scrub away the caulk.

You will need a scraper or sharp blade to cut off the caulk. Scrub the remainder off with denatured alcohol. If you do leave behind some caulk, at least no one will notice it underneath the sink! Mount the faucet and other accessories over caulk.

Set the accessories on top of caulk. After centering them over the holes in the countertop, install the water lines. Run the lines up through the faucet and control knobs to finish the sink.