Custom stone soaking tubs
Each tub carved from a single block of natural stone. Custom dimensions, finish, and shape to your specifications. No two alike.
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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 soaking tub
From stone origin and material selection to installation requirements and maintenance.
Where do NexaBuilder stone soaking tubs come from?▼
Stone soaking tubs are carved from single blocks of natural stone sourced from quarries in Queretaro, Mexico. Primary stones include Cantera, Chiluca, and Travertino, hand-carved by maestros with 25-35 years of experience.
How heavy is a natural stone soaking tub?▼
A standard 60x32-inch stone soaking tub weighs 400-800 lbs empty and 2,000-4,000+ lbs when filled. The bathroom floor and framing must be structurally engineered to support this load before installation.
What structural support is required for a stone soaking tub?▼
A reinforced platform rated for full load (stone plus water plus occupant) is required. A structural engineer must assess the floor system and specify required steel or concrete support.
Can a stone soaking tub be customized to fit our bathroom?▼
Yes. All NexaBuilder stone soaking tubs are carved per project to your exact dimensions, with custom basin size, drain location, and finish. Fabrication lead time from Mexico is 4-8 weeks.
How do I seal a natural stone soaking tub?▼
Apply food-safe penetrating impregnator sealer to the basin interior before first use and re-seal every 6-12 months. Use pH-neutral 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 custom stone soaking tub installation in Southern California.
Structural & Setting Requirements
Stone soaking tubs require reinforced structural framing capable of supporting 2,000–4,000+ lbs when filled. A steel-framed platform with cross-bracing is standard. Waterproofing the surrounding deck with a crystalline slurry before tile or stone setting prevents moisture infiltration.
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 Custom Stone Soaking Tub 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 custom stone soaking tub?
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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