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LUXIFY · FLOATING VANITY
A stone vanity that floats, engineered from the wall out.
Set the size, the apron and the wall it hangs on, carve the bowl in the same stone, and see what the wall has to carry before anyone drills.
Start designingPreparing your vanity in 3D…
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THE WALL BEHIND IT
What this vanity needs from the wall
- Back wall alone is NOT enough. A welded steel T-frame goes INSIDE the wall, recessed and anchored to continuous 2×4 blocking. Open the wall before the stone arrives.Not as it is
- Wood 2x4 with blocking: high confidence. Lag screws into solid wood, through the drywall and into the blocking, with a wide washer.Ready
- Nothing sits under the bowl. The bowl and its trap take the middle (35" of dead zone), so the support runs the full width as one piece — a bar or frame, never a bracket in the bowl zone.Plan for it
- stone top and apron
- 208 lb
- carved bowl · Undermount 27″
- 138 lb
- total load on the wall
- 345 lb
- pull at the top of the cleat
- 474 lb
- support it calls for
- Recessed welded steel T-frame
- stone to cut
- 12.8 sq ft
Continuous rail / ledger + 2 × Concealed L, 16"
The mitred apron and the wall cleat, cut through. T = P × a / h: the load P sits a = D/2 from the wall and pulls the top of a cleat h tall.
Supports in detail
- Continuous support — Continuous rail / ledger
- The bowl takes the middle: with the trap clearance there is 12.5" of band left at each end, and the span between the inner brackets would be 35" — past the 24" this thickness carries with a cutout in the middle. There is no room for a bracket in the centre, and it would not solve it either.
- A steel bar or angle across the full width, bolted into every stud. The entire back edge is supported — including under the bowl. It shares the load, removes the need for support in the middle, and doubles as a levelling guide at install.
- Plus 2 × Concealed L, 16" at the ends to catch the depth.
- The 16" arm reaches the 14.7" required (two thirds of the depth). Rated 350 lb; with a service factor of 2 that is 175 lb per bracket — 350 lb at the ends, for the front overhang. The back edge is carried by the continuous rail, which is what answers the 345 lb.
- Anchorage of each bracket: it pulls 237 lb → 3 × 3/8" lag screw into SPF (Spruce-Pine-Fir) (each one worth 235 lb: NDS 235 lb per inch × 2" ÷ factor 2). On site that is 6 lags in total.
- The chain is stone → bracket → lag → stud. The weakest link governs, and it is usually not the bracket.
Notes for the installer
- Load is high: check each fastener's capacity in the manufacturer's table for the real substrate, and consider having a professional review it.
- Raising the cleat from 8" to 12" drops the pull from 474 lb to 316 lb.
- The blocking has to be decided during framing. Once the drywall is closed, opening the wall again is construction work.
- A 27" bowl in the middle: with 4" of trap clearance on each side, 12.5" of clear band is left at each end and the clear span between the inner brackets lands at 35" — past the 24" that 3 cm stone carries with a cutout in the middle. Point support does not solve this.
- Continuous rail / ledger: A steel bar or angle across the full width, bolted into every stud. The entire back edge is supported — including under the bowl. It shares the load, removes the need for support in the middle, and doubles as a levelling guide at install.
- On a floating vanity there is no cabinet underneath: the 138 lb bowl hangs on the wall too. A continuous rail catches the whole back edge, including under the bowl.
- 2 x Concealed L, 16" (arm 16") every 35.0". Usable capacity 175 lb per bracket with a factor of 2 on the rated load — 350 lb together for 345 lb of load.
- A 138 lb bowl needs support of this class — and with no cabinet under a floating vanity it has to come off the wall structure instead: A continuous cradle: a 3/4" plywood platform or a steel frame bolted to the sides and the back of the cabinet.
- An undermount stone bowl always gets independent mechanical support — a cradle, steel bars or a platform in the cabinet. The epoxy seals and aligns it; what holds the weight is the cradle.
Plan the wall behind itStuds, blocking and backer board for this vanity, with a cut list and an installer manual.
CARVED STONE SINKS
5 carved bowls, drawn to scale in your stone.
Each drawing comes from the same profile we use to weigh the bowl and to cut it. Choose the bowl, then how it is built and how it meets the counter.
Undermount 27″ · 138 lb · about 12 days
Undermount 27″
- Weight
- 138 lbat 165 lb/ft³
- Fabrication time
- about 12 daysMitred from the slab (45°)
- Base cabinet
- 30″US standard minimum
- Cutout in the top
- 24.64″ × 15.64″3/8″ corner radius
- Edge clearance
- 2″minimum to a finished edge
- Usable depth
- 7.82″rim to floor
- Stone
- 5 slab pieces9 sq ft from your slab
What the shop needs to know
- The cutout in the top is the bowl's mouth (24.64″ × 15.64″), not its outside outline, with a 3/8″ radius in the corners.
- Needs a 30″ base cabinet (US standard); a smaller cabinet will not take this bowl.
- Keep the bowl at least 2″ from any finished edge of the top; a thinner stone bridge can crack in transport, at install or in service.
- The bowl's weight must never hang on the glue line. A cradle or bars in the cabinet carry the bowl; the adhesive only seals and aligns.
- 138 lb: two installers and support in the cabinet.
- The pieces come from the SAME slab, side by side: the vein crosses the fold without breaking the pattern.
How it is assembled · Integrated under the top (bonded below)
When to choose it: The most common case for vanities and kitchen counters, when you want a single-piece read in the project's own stone.
The cutout in the top is the bowl's mouth (inside size), not its outside outline: the walls stay hidden below.
Reveal: zero (flush) · positive (the top overhangs the bowl) · negative (the bowl steps past the top)
- Cut the top and the cutout with at least a 3/8″ radius in the corners; polish the mouth of the cutout, which stays in view.
- Assemble the bowl (walls and floor) and let it cure before it touches the top.
- Set the top face down on padded sawhorses and mark the bowl position from the cutout.
- Run a bead of epoxy along the top face of the walls; seat the bowl, align the chosen reveal and lock it with clamps.
- Cure without load. Only then turn the assembly over.
- Bring the assembled unit to the cabinet: on a floating vanity, the top and the bowl go in as ONE piece onto the rail or brackets.
A planning study in your stone. Our fabricator confirms walls, support and the cutout template before cutting. The bowl is priced with your project, never by itself.
Next steps
Your project price
Price on request
Every floating vanity is engineered to its wall, so an estimator prices it from this exact design and sends your project price within one business day.
- Priced from this design: size, apron, bowl, stone and the wall it hangs on.
- Your price by text, WhatsApp or email, whichever you prefer.
- Measured and templated on site before anything is cut.
WhatsApp is answered by the Luxify team; Eli is a separate conversation on this site. A planning study, not an inspection. A Luxify specialist confirms the wall, the support and the templates on site before fabrication; the local code governs.