The Countertop Installation Process, Step by Step: From Slab to Sink

The countertop installation process has seven steps: pick the slab, template the cabinets, lay the template out on the slab, fabricate in the shop, remove the old tops, install the new ones, then seal and let the adhesives cure. At Kitchen Remodel Masters in Houston, the template happens after the cabinets are set and level, Eduardo cuts and polishes the slab in our own shop, and the install is usually one day within days of templating, so plan on 1 to 2 weeks from template to finished counters.

This is how countertops are installed on a countertop replacement and inside a full remodel. For prices, see the countertop replacement cost guide; for picking the material, how to choose a countertop.

Countertop installation timeline

Step	Who does what	Time
Slab selection	You pick the slab at the stone yard with us, or from our samples	1 visit, 1 to 2 hours
Cabinets set and leveled	Cabinet crew, or we check your existing boxes	Before the template
Digital template	Eduardo measures; you decide sink, cutouts, edge and backsplash	About 1 hour
Layout on the slab	You approve where the seams and veins fall	Same day or next day
Fabrication	CNC cut, edge profile, cutouts, polish in our shop	A few days
Removal and install	Old tops out in the morning, new stone set, seams filled, sink set	1 day
Cure and sealing	No water in the sink for 24 hours; sealer fully cured in 72 hours	1 to 3 days

In a full kitchen remodel the counters go in during the last week, after the cabinets and before the backsplash tile.

Step 1: Slab selection and the yard visit

For natural stone, you pick the exact slab with us at the stone yard, not a sample. For quartz, the pattern repeats from slab to slab, so a sample is enough. A small vanity or island can often come from a cheaper remnant.

• Slab size. A granite or quartzite slab is roughly 9 to 10 feet long (Stone Tech Fabrication, 2026); Cambria’s jumbo quartz slab is 132 by 65.5 inches (Cambria). Any run longer than the slab needs a seam.
• The stone test. Eduardo tests quartzite at the yard with a glass and a drop of vinegar: real quartzite scratches glass and does not etch. Some stone sold as quartzite is softer marble. See quartzite countertops.

Step 2: Cabinets set and level before the template

The template records the cabinets as they sit that day. If they move after it, the stone will not fit, so new cabinets are installed, screwed to the wall and leveled first; stone cannot be shimmed after it is cut.

Houston homes need extra care here. Pier-and-beam houses in the Heights, Montrose and Bellaire move with the seasons, and slab-on-grade houses settle when the clay dries out in August. A run a quarter inch out of level leaves a stress point in the stone, and that is how 3 cm granite cracks a year later. We check level at the template visit and shim the boxes first; swollen particleboard boxes, common under old laminate tops in Houston’s humidity, are replaced.

Step 3: Countertop templating, measuring vs digital

Older shops glue strips of hardboard into a physical template. Our countertop templating is digital: a laser or photo system records the cabinet run, walls and corners as a CAD drawing that goes straight to the saw, so the cut matches the kitchen, including a wall that is out of square, to within a fraction of an inch.

Everything cut into the stone is decided at this visit:

• Sink. It must be on site, because an undermount cutout is cut to the sink. You also pick the reveal: positive (a lip of stone over the sink edge), zero (flush with the bowl) or negative (sink rim showing). Zero or slight positive is easiest to keep clean.
• Cooktop. Cut to the manufacturer’s template, which also sets the side wall clearance; GE, for example, lists 6 inches above counter height for its gas ranges (GE Appliances). Checked before the stone is cut.
• Faucet holes, edge profile and backsplash. How many holes; eased, bevel, bullnose, ogee or a mitered waterfall edge; a 4-inch stone strip, a full-height slab, or tile, in which case the backsplash installation follows the counters.
• Overhangs. How far the island top hangs past the cabinet for seating, which decides whether brackets are needed.

Step 4: Layout on the slab and vein matching

Before anything is cut, the template is laid out on the slab on screen and you approve where each piece comes from and where the seams fall. On a veined stone like Taj Mahal quartzite, this decides whether the vein runs through the seam or stops at it; for a waterfall island, the top and leg come from the same area so the vein wraps the miter.

Seam rules, which match Stone Tech Fabrication’s guide (2026): every seam sits over a cabinet, never over open air; at least 4 to 6 inches from a sink or cooktop cutout; where it is least visible, the inside corner of an L, the center of the sink or behind the cooktop; and about 1/16 inch wide, filled with epoxy mixed to the stone’s color. You sign off before the saw starts.

Step 5: Fabrication in the shop

Eduardo, our fabricator of 15 years, cuts the slab in our Houston shop. A CNC saw makes the straight cuts, the sink and cooktop cutouts and the faucet holes from the template file; a router shapes the edge, and every exposed edge is polished to match the face. Cutting takes a day and polishing the rest; a waterfall miter or a book-matched quartzite adds a day or two. Because the shop is ours, the pieces go on the truck the day they are done, which is why the install usually lands within days of the template.

Step 6: What to expect on countertop installation day

Install day is the one day your kitchen is out of service. Here is what to expect.

1. Disconnect. The plumber shuts off the water and disconnects the faucet, drain, disposal and dishwasher; a gas cooktop is capped.
2. Remove the old tops. Laminate and tile come off in pieces; old granite is cut into sections. A 4-inch stone backsplash tears the drywall behind it on the way out, which is why most clients replace the backsplash in the same job.
3. Dry fit. Each piece is set without adhesive and checked for level, wall gap and seam fit; a wall out of square gets a scribe cut on site.
4. Set the stone. Beads of 100 percent silicone on the cabinet rails hold it down. Seams are filled with color-matched epoxy, pulled tight with a seam setter and shaved flush once the epoxy sets, usually in 15 to 30 minutes.
5. Overhang support. The Natural Stone Institute’s Dimension Stone Design Manual limits an unsupported overhang to 6 inches for 2 cm stone and 10 inches for 3 cm (Natural Stone Institute, 2025). Cambria’s quartz guideline allows 12 inches for 2 cm and 15 inches for 3 cm before corbels or steel are required, and never more than one third of the countertop depth (Cambria). A 12-inch breakfast bar on 3 cm granite gets flat steel brackets screwed into the cabinet frame before the stone goes on.
6. Mount the sink. An undermount sink is bedded in silicone and held with clips epoxied to the underside of the stone. Silicone alone is not rated to hold a 50-pound sink (SlabWise, 2026).
7. Reconnect. The plumber reconnects the faucet, drain and dishwasher the same day in most kitchens, or the next morning when the undermount sink bead needs the full cure first.

Step 7: Sealing and cure times

The adhesives. The silicone under the stone and around the sink reaches a usable cure in 24 hours and a full cure in 24 to 72 hours (SlabWise, 2026, citing the Dow 786 data sheet). No running water, disposal or a full undermount sink for 24 hours; light use of the countertop is fine the same evening.

The sealer. Granite and quartzite are sealed at installation. A penetrating sealer like Miracle Sealants 511 is dry for light use in 2 to 5 hours and fully cured in 72 hours (Rust-Oleum technical data sheet). Keep oil, wine and lemon off the stone for those three days, then reseal about once a year. Quartz and porcelain never need sealing. Houston’s hard water leaves a mineral film on dark stone within weeks; a daily wipe with a dry cloth keeps it off.

What can go wrong, and how it is avoided

• Cabinets out of level. The most common cause of a cracked top. Fixed by leveling at the template, not by shimming the stone.
• The 4-inch backsplash gap. Decide on the new backsplash before the template so stone and tile are planned together.
• Seams or overhangs with no support. You approve the layout on the slab, and brackets go in before the stone.
• Using the sink too soon. Water at hour four pulls the uncured silicone off the stone. Wait the 24 hours.

Houston notes

Cosmetic countertop replacement does not need a City of Houston permit (Houston Permitting Center); moving a sink to a new island on a slab foundation does, because the drain is cut into the slab. Hurricane season can delay a slab delivery by a week, so pick the slab early for a September install. Standard quartz is not approved for outdoor use, so an outdoor kitchen uses granite, quartzite or porcelain under a cover.

A finished example on existing cabinets: the countertop replacement in Tomball, templated in one visit and set in one day. The same sequence applies to quartz countertops in new kitchens from Bellaire to Spring.

Get an exact number

Sean comes to your home, measures the kitchen, and builds a free 3D design with the countertop, edge and backsplash in it. The proposal lists the slab, the template date and the install date. Call (713) 364-6603 or request your free consultation.

Sources

• Natural Stone Institute, “Supporting Countertop Overhang” (Technical Q&A on the Dimension Stone Design Manual overhang limits) https://pubs.naturalstoneinstitute.org/pub/4ABDB8EF-0498-0818-2E66-8BADEBCC9F23 (April 2025)
• Cambria, “Countertop Installation Technical Guideline” https://www.cambriausa.com/content/dam/cusa/sales-marketing-collateral/sops/countertop-installation-technical-guideline.pdf (accessed November 2026)
• Cambria, “Quartz Countertops FAQ” (slab sizes) https://www.cambriausa.com/quartz-countertops/faq (accessed November 2026)
• Stone Tech Fabrication, “Where Should Countertop Seams Go?” https://stonetechfabrication.com/countertop-seams-placement/ (October 2026)
• SlabWise, “Silicone cure time under stone countertops” https://slabwise.com/guides/what-is-the-cure-time-for-silicone-under-stone-countertops (July 2026)
• Rust-Oleum / Miracle Sealants, “511 Impregnator Water-Based Technical Data Sheet” https://www.rustoleum.com/-/media/DigitalEncyclopedia/Documents/RustoleumUSA/TDS/English/CBG/miracle%20sealants/MS-08_Miracle_Sealants_511_Impregnator_Water-Based_TDS.ashx (accessed November 2026)
• GE Appliances, “General List of Minimum Air Clearance Requirements” https://products.geappliances.com/appliance/gea-support-search-content?contentId=21841 (accessed November 2026)
• Houston Permitting Center, “Residential Remodel Permit (HPWCODE1135)” https://www.houstonpermittingcenter.org/hpwcode1135 (2026)