Cambria Home Additions & ADU: The South Florida Owner’s Guide
Groundwork Construction Co. of South Florida installs Cambria countertops and surfaces in home additions and ADU projects across Broward, Miami-Dade, and Palm Beach counties, with typical installed pricing for Cambria-equipped additions running $45,000-$130,000 depending on footprint and finish level. We stock Cambria slab inventory and coordinate templating within 48 hours of contract signing, with most ADU kitchenettes and primary addition kitchens ready for surface installation within 3-4 weeks of framing completion. Most South Florida homeowners discover their Cambria surface needs attention when hairline cracks appear near cooktop cutouts, seams lift in high-humidity months, or the original installer used inadequate substrate support for the slab’s weight.
Which Cambria Models This Applies To
Cambria’s engineered quartz surfaces used in home additions and ADUs fall into several product lines, and matching the right slab to your existing installation matters for seam consistency and warranty coverage. The Brittanicca, Torquay, and White Cliff lines are the most common requests we see in South Florida additions, particularly in coastal-style ADU kitchenettes where homeowners want the marble-look without the porosity. Check the underside of your existing countertop for a Cambria lot number sticker, or measure slab thickness: Cambria ships at 1.2 cm, 2 cm, or 3 cm, and mixing thicknesses at a seam guarantees a visible lip that collects grime.
We source Cambria through authorized distribution, not big-box remnants. OEM slabs carry Cambria’s Full Lifetime Warranty; aftermarket or remnant-sourced Cambria voids that protection and often lacks the consistent resin formulation that prevents yellowing in South Florida’s UV exposure. If your addition connects to an existing kitchen with Cambria already installed, we’ll pull the original lot number from your Cambria registration card or work directly with their regional rep in Medley to color-match from current production runs.
Signs Your Cambria Home Additions & ADU Is Failing
- Hairline cracks radiating from sink or cooktop cutouts. Cambria is 93% crushed quartz, but the resin binder fatigues when the substrate underneath flexes. In South Florida, we see this most in ADUs where the original builder used 5/8″ plywood instead of 3/4″ with full perimeter support. The crack won’t heal itself; it channels water to the cabinet box below.
- Visible seam separation or adhesive squeeze-out. Humidity swings in unconditioned South Florida garages converted to ADUs stress the color-matched epoxy joints. When the gap exceeds 1/16″, it’s not cosmetic; it’s a structural seam failure that allows moisture and ant intrusion.
- Dull or etched patches that don’t respond to cleaning. Cambria resists etching better than marble, but prolonged exposure to pool chemicals, acetone-based adhesives, or DIY epoxy repairs strips the factory polish. These patches indicate surface resin degradation, not dirt.
- Slab movement or “clicking” when you lean on the counter. The silicone bond between slab and substrate has failed, usually from inadequate cabinet leveling during the original addition build. A 3 cm Cambria slab weighs roughly 20 pounds per square foot; unsupported spans over 24″ without corbels will eventually crack.
- Discoloration or whitening along the backsplash joint. South Florida’s driving rain finds every exterior wall gap in additions. When moisture wicks behind the backsplash through poorly flashed addition rooflines, it degrades the adhesive and pushes mineral deposits to the surface.
Replacement Cost & What’s Included
| Component | Price Range |
|---|---|
| Cambria slab (per sq. ft., material only) | $75-$125 |
| Template, fabrication, and installation | $2,000-$6,500 |
| Substrate repair/replacement (if needed) | $400-$1,200 |
| Full addition kitchen with Cambria surfaces | $45,000-$130,000 |
| ADU kitchenette with Cambria surfaces | $90,000-$220,000 (total ADU) |
What drives the range: slab grade (standard vs. design collection), edge profile complexity, cutout density for sinks and appliances, and whether we’re tying into existing Cambria that requires lot-number matching. Our quotes include digital templating, CNC fabrication, dry-fit verification before final install, and silicone color-matching to your grout or cabinet finish. We don’t markup Cambria material; you pay our contractor rate direct from the distributor. Workmanship carries our standard guarantee; Cambria’s own lifetime warranty transfers with homeowner registration.
DIY or Call Us?
There’s exactly one safe DIY check: verify whether the slab is actually moving independently of the cabinet box by pressing firmly at corners and listening for substrate contact. If it’s solid, the issue is likely surface-level and needs professional refinishing, not replacement.
Everything else requires specialized handling. Cambria slabs cannot be field-cut with standard wet saws; the diamond blades and water suppression systems run $3,000+ for proper fabrication, and a chip during homeowner cutting ruins the entire slab. More critically, 3 cm Cambria in a full addition kitchen can exceed 400 pounds; improper lifting technique or inadequate cabinet support during removal risks slab fracture, cabinet damage, and serious back injury. We’ve been called to three South Florida jobs this year where a homeowner’s “simple” removal turned into a full cabinet and substrate rebuild.
Call (844) 665-0162 and we’ll walk through what’s actually failing before you commit to anything. Estimates are free, and we’ll flag whether your issue is slab, substrate, or moisture intrusion from the addition envelope.
FAQs
Properly installed Cambria surfaces last 25-30 years in South Florida’s climate, though unconditioned ADU spaces with humidity cycling above 70% can shorten adhesive bond life to 15-18 years. The quartz itself doesn’t degrade; the failure points are always substrate movement, moisture intrusion, or improper initial support. Call (844) 665-0162 for a free assessment of your specific installation environment.
Surface chips and minor edge damage can be filled with color-matched epoxy by a certified fabricator, but cracks through the body of the slab are not repairable to structural or sanitary standards. The resin fill will always remain visible and can reopen with thermal expansion. We evaluate every slab in person; about 30% of “replacement” calls we receive in South Florida turn out to be repairable substrate or seam issues instead. Call (844) 665-0162 for an honest diagnosis.
From template to install, typically 10-14 business days for standard slabs in stock at the Medley distribution center; 4-6 weeks for design collection colors or lot-matched custom orders. We schedule demolition and template on the same day to minimize kitchen downtime, and most South Florida addition projects see functional countertops restored within 48 hours of slab arrival. Call (844) 665-0162 to check current lead times on your specific Cambria color.
We maintain relationships with Cambria’s regional distribution and typically have 8-12 standard colors available for immediate template in the South Florida market, including the Brittanicca and Torquay lines most requested for addition kitchens. Design collection and lot-matched orders ship from Minnesota within 2-3 weeks. We don’t warehouse full slabs on-site; the color range is too broad and Cambria’s inventory system is efficient enough that special orders rarely delay project schedules. Call (844) 665-0162 to confirm availability for your specific project timeline.
Groundwork Construction Co. of South Florida is an independent contractor and is not affiliated with, endorsed by, or an authorized dealer of Cambria. We source and install Cambria products as part of our full-scope residential construction services.
We also stock and install parts and materials for KraftMaid cabinetry, Silestone surfaces, and Kohler fixtures - the same brand accountability across every layer of your addition or ADU build.
From driveway to roofline, one contractor handles every phase. You choose the brand, we handle the build. Built to spec, not to convenience. Expand what’s possible.
Do it right the first time or you’ll do it twice - and the second time always costs more.
Written by Raymond Estevez, Owner & General Contractor, Groundwork Construction Co. of South Florida at Groundwork Construction Co. of South Florida, serving South Florida and nearby areas.