Custom stone sinks
Hand-carved stone sinks — vessel, undermount, and bar configurations. Carved from solid blocks of natural stone. Custom basin size, drain placement, and finish.
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All stone sourced from quarries in Mexico · Per project request · 4–8 week lead time for Southern California projects
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Common questions about custom stone sink
From stone origin and material selection to installation requirements and maintenance.
What stone is used for NexaBuilder stone sinks?▼
Stone sinks are carved from Cantera, Travertino, Basalto, and Chiluca, all sourced from Mexico. Basalto is most durable and least porous. Cantera produces the most sculptural vessel sinks. Travertine requires more frequent sealing in kitchen use.
Where are NexaBuilder stone sinks carved?▼
Stone sinks are hand-carved by maestros in workshops in Queretaro and Oaxaca, Mexico. Each sink is carved from a single block. The tradition of carving stone basins in Mexico dates back to pre-Columbian times.
How heavy is a carved stone sink?▼
A standard 18x12-inch vessel sink weighs 40-80 lbs. A 30-inch kitchen sink weighs 150-300 lbs. Cabinet substrate must be reinforced with 3/4-inch marine-grade plywood minimum.
What drain hardware is used with a stone sink?▼
Standard drain assemblies with stone-safe silicone sealant at the drain flange, never plumber's putty, which contains oils that permanently stain porous stone.
How do I maintain a natural stone sink?▼
Apply food-safe penetrating sealer before first use and re-seal every 6-12 months. Clean with pH-neutral stone soap only. Avoid bleach, vinegar, or citrus, which etch stone.
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Installation & Finishing Guide
Materials, methods, finishing products, tools, and pricing guidance for stone sinks installation in Southern California.
Structural & Setting Requirements
Stone vessel sinks require a reinforced cabinet top — 3/4-inch marine-grade plywood minimum, with cement board layer if any moisture exposure is possible. The drain assembly is stainless with stone-safe silicone sealant (not standard plumber's putty, which stains porous stone). Interior of sink bowl is sealed with food-safe penetrating sealer; re-seal annually.
Standard setting mortar: Type S masonry cement + washed plaster sand (1:3 ratio). For wet areas and pools: white latex-modified thin-set. Never use pre-mixed mastic in wet or exterior applications.
Natural stone is heavy. Calculate dead load per square foot: cantera avg 12–14 lbs/ft², travertine 13–15 lbs/ft², quartzite 16–18 lbs/ft². Submit loads to structural engineer for any overhead or load-bearing applications.
For any wet-area application, apply crystalline waterproofing membrane (XYPEX, Kryton, or equivalent) to substrate before stone setting. Two coats at 90° to each other. Allow full cure before setting stone.
Cleaning, Sealing & Enhancement
After mortar cure (72 hrs), clean with pH-neutral stone-safe cleaner. Remove grout haze with manufacturer-recommended haze remover — not muriatic acid, which damages porous stone. Rinse thoroughly.
Apply penetrating impregnator sealer (silane/siloxane blend) after cleaning and full cure. Exterior: StoneTech BulletProof or equivalent. Pool-adjacent: chlorine-resistant formula. Re-seal every 1–3 years.
For color enhancement (wet-look or natural finish), use enhancer + sealer combo product. Test on back of sample piece first — some stones will darken significantly. Enhancement is permanent.
pH-neutral cleaner only for daily cleaning. No vinegar, bleach, or citrus. For stain removal, use stone poultice appropriate to stain type (oil, rust, organic). Re-seal on schedule. Inspect joints annually.
Tools & Jobsite Equipment
- Angle grinder with 4″ diamond blade
- Wet tile saw with diamond blade (7″–10″)
- Hand-held circular saw with segmented diamond blade
- Stone chisel set + 3 lb mash hammer
- Bull-nose router bit (for edge profiles)
- Laser level (rotary, self-leveling)
- 4’ and 6’ bubble level
- Rubber mallet + wooden beating block
- Notched trowel (1/2″ square-notch for thick-set)
- Suction cup lifters (for large slabs)
- Stone spacers (3/8″ and 1/2″)
- Grout float (for wide joints)
- Grout bag + nozzle (for raked joints)
- Sponges + 5-gal buckets
- Caulk gun (for silicone joints)
- Painter’s tape (protect stone from mortar drips)
- Stone dolly / panel cart (for heavy slabs)
- Mortar mixer (drum or paddle)
- Scaffolding or pump jack (elevated work)
- Vacuum + HEPA filter (silica dust control)
- PPE: N95 respirator, safety glasses, cut-resistant gloves
Cutting dry stone generates crystalline silica dust — a known carcinogen causing silicosis. Always wet-cut or use vacuum dust collection. Never dry-cut cantera or travertine without N95 minimum respiratory protection.
Pricing a Stone Sinks Job
All stone is sourced and imported from Mexico per project. Lead time is typically 4–8 weeks from order confirmation. Do not schedule installation without confirmed delivery date and full material inspection on arrival.
Order 10–15% overage on all stone — breakage, cuts, and pattern matching demand extra material. Once a lot leaves the quarry, matching is nearly impossible. Leftover stone has resale value; short material stalls the project.
Include in your bid: substrate prep, waterproofing, structural steel (if required), mortar and grout materials, sealer, equipment rental, and disposal. Stone is often 40–60% of project cost.
Always inspect stone in person before full order — photos don’t capture variation, color, or finish accurately. Request samples of the actual lot. Verify dimensions are exact before cutting begins.
Ready to order stone sinks?
All stone is sourced per project from Mexico. Request a quote and we’ll match you with a CSLB-verified stone contractor and confirm material availability.
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