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Silestone Home Additions & ADU: The West Palm Beach Owner’s Guide
Silestone countertops and surfaces in a home addition or ADU in West Palm Beach typically run $45,000 – $130,000 for the full project, with the Silestone portion of that usually landing between $2,000 and $6,500 depending on slab count and edge profile. We stock the common Silestone components and complete most surface installs within the same week once permits clear. The failure owners usually see first is a seam that opens or a slab that shifts off its substrate, especially in an addition built on fresh fill that settles for the first two to three wet seasons.
We’re an independent contractor in West Palm Beach, not a Silestone factory outlet. That means we match your existing product from manufacturer specs and our local supplier network, then install it to hold under Florida heat, humidity, and hurricane-driven moisture swings. No finger-pointing between manufacturer and installer. One crew, one written price, one guarantee.
Which Silestone Models This Applies To
Silestone runs three main series that show up in West Palm Beach additions and ADUs: the standard quartz line (60%+ quartz content, 12mm to 20mm slab thickness), the Loft series (matte finish, roughly 20mm), and the newer HybriQ technology slabs (20mm, lower silica composition). If your addition was permitted after 2020, odds are you have a HybriQ slab, and that matters for matching: HybriQ color lots differ subtly from the older standard line of the same named color. Pull the label under the overhang or check your original purchase order for the lot code before we cut.
For any Silestone surface going into an ADU, we spec 20mm over 12mm here. The thinner slab flexes in transport and cuts, and Florida humidity plus a non-conditioned ADU during the months nobody lives there is hard on a 12mm overhang. OEM slabs versus aftermarket “quartz-compatible” material: OEM Silestone gives you the manufacturer warranty and closest color match to what you already own. Aftermarket equivalents save about 15 – 20% but will show a slight tint difference at the seam in natural light. We’ll quote you both and let you decide with the numbers in front of you.
Styles & brands we work with
Signs Your Silestone Home Addition or ADU Is Failing
- Seam separation at the cooktop or sink run. The counter line carries the most expansion-contraction stress from appliance heat and plumbing moisture. If the seam caulk keeps cracking or you can slide a fingernail into the joint, the original seam was cut too tight or the substrate wasn’t flat within tolerance.
- Slab overhang lifting along the breakfast bar. This is a support failure, not a stone failure. Wood corbels wick humidity from a non-conditioned ADU, swell and push the slab, then dry out and leave a visible gap. We replace corbels with steel bracket systems rated for outdoor-adjacent humidity.
- Hairline crack running from the rough-in cutout. The sink cutout corners are the classic failure point, especially when the plumber torqued the faucet from above. Cracks from a cutout corner mean the slab was probably installed over a substrate with a dip, and the stone has been spanning that void under load.
- Cloudy, chalky surface texture that won’t polish out. Hard water in West Palm Beach plus the calcium in Silestone’s quartz composite reacts over time. If the surface feels like fine sandpaper, the top seal has worn through. We can re-polish and reseal without a full tear-out.
- Slab shifting where the ADU addition meets the original structure. Two different foundations settle at different rates. The seam where old meets new takes the stress. If your Silestone counter bridges that line, expect movement for the first five years until the soil finishes compacting.
See the difference
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AfterReplacement Cost & What’s Included
In West Palm Beach, a Silestone surface replacement inside a home addition or ADU runs $2,000 – $6,500 depending on slab square footage, edge profile, thickness, and whether we’re replacing one run or the full kitchen. Full addition and ADU projects with Silestone included land in the $45,000 – $130,000 range, and ADU construction specifically runs $90,000 – $220,000. For the Silestone portion, the range breaks down like this:
- Surface area: $45 – $85 per square foot installed, depending on slab selection and thickness.
- Edge profile: Standard eased edge included. Bullnose, ogee, or mitered add $300 – $900 per project.
- Seam work and cutouts: Each additional seam beyond the first adds $150 – $350. Sink and faucet cutouts included in the square-foot price.
- Removal and disposal: $250 – $600, including haul-off and site clean before the new slab sets.
Every Silestone job we write carries the 365-Day Done Right Promise in writing: if the seam fails, the slab shifts, or the finish degrades inside one year, we come back and correct it at no charge. The price you sign is the price you pay. No number moves at the door.
DIY or Call Us?
Quartz slabs are not a DIY material, and an ADU in West Palm Beach adds its own complications: cutting Silestone produces silica dust that requires a wet saw and proper respirators, and the slab itself weighs 15 – 18 pounds per square foot, which means a standard kitchen run weighs 500 pounds plus. A dropped slab destroys cabinetry, tile floors, and sometimes a foot.
What an owner can safely do before calling us: measure the existing run’s length and overhang with a straight tape, check the substrate for soft or swollen wood, and photograph the label under the remaining overhang so we can match the lot code. That saves a trip and speeds the estimate. When you’re ready for a real number, call (728) 203-9809. We’ll walk the site, write the price, and hand it to you before any agreement gets signed.
FAQs
A properly installed Silestone counter in a West Palm Beach addition lasts 15 – 25 years before surface wear justifies replacement, though seal touch-ups may be needed every 2 – 4 years depending on water hardness and sun exposure near windows. The failure we see most before that mark is seam stress from foundation settlement, which is an installation and substrate issue, not a Silestone defect. Call (728) 203-9809 for an exact assessment and written estimate on any Silestone surface showing early wear.
Yes, hairline cracks away from load points can often be epoxy-filled and color-matched for $300 – $800, with the result visible but structurally sound. Cracks running from a cutout corner into a span typically cannot be repaired reliably because the slab keeps flexing over the substrate void. We’ll give you an honest read on repair versus replacement before any work starts.
Most Silestone counter replacements in West Palm Beach take 2 – 4 days from template to finished install: day one is measure and template, day two or three is slab cutting at the fabricator, and the install itself is one day including removal of the old top and sink reconnection. If permits are required for adjacent work, the timeline follows the municipal review schedule, which in West Palm Beach typically adds 1 – 3 weeks.
We pull from local Silestone distributors in the West Palm Beach market, which gives us access to most standard colors within 3 – 5 business days and discontinued colors through a match-and-approve process that takes longer. We do not warehouse every slab, but we can usually get a sample to your door before you commit. Call (728) 203-9809 and we’ll check inventory for your exact color and lot.
Written by Curtis Lane, Owner, Bradford Remodeling Co – West Palm Beach at Bradford Remodeling Co West Palm Beach, serving West Palm Beach and nearby areas.
