How to track slab, tile, and plumbing approvals across multi-bath luxury projects

If you run an interior design studio, procurement can quietly drain your time and your margin. Most studios already organize these specs across spreadsheets, physical sample trays, and endless email threads long before a system enters the picture. But when a client approves a marble slab without confirming the wall-mounted faucet spec, the downstream rework with your fabricator can cost thousands of dollars.

Wet-area approvals cannot happen in a vacuum. They require a staged sequence where plumbing rough-ins are locked before stone fabrication begins. Managing these dependencies across multiple rooms requires a level of auditability that standard project trackers rarely support.

The multi-bath bottleneck: Why wet areas need strict approval staging

In high-end residential enclaves like Palm Beach, Naples, or the Miami waterfront, luxury bathrooms are highly customized environments. You are not just picking a tile and a sink. You are coordinating integrated slab vanities, wall-mounted plumbing, recessed niches with mitered edges, and complex drainage systems.

The risk of a sequence error is incredibly high. If the plumber installs a rough-in valve set for a standard deck-mount faucet, but the client later falls in love with a wall-mounted brushed bronze spout that requires a three-inch projection, you face a major issue. Correcting this after the fact means tearing out drywall, ruining the waterproofing membrane, and delaying the tile setters.

To protect your margin and your sanity, your studio needs a clear gatekeeping process. You must treat plumbing rough-ins, surface materials, and decorative trim as interconnected steps rather than isolated purchases.

The staging sequence: Mapping dependencies from rough-in to trim

To keep your projects moving without costly rework, establish a clear three-gate approval process for every wet area on the project:

• Gate 1: Plumbing rough-ins. This includes the valves, diverters, and drain bodies that sit behind the wall. These must be approved and ordered first so the framing and plumbing crews can do their work.
• Gate 2: Slab and tile selection. This covers the raw materials, dye lots, vein matching, and layout drawings.
• Gate 3: Decorative trim and fittings. This includes the visible plumbing trim, handles, shower heads, and hardware.

A worked example: The Palm Beach master bath

Let's look at how this plays out with actual numbers and vendors. Imagine you are designing a master bath with a custom double vanity.

You source a beautiful Calacatta Lincoln slab from Opustone and a luxury wall-mount faucet package from Farrey's Lighting & Bath.

[Gate 1: Rough-in Valve] ---> [Gate 2: Slab & Fabrication] ---> [Gate 3: Trim & Fittings]
  Approved & Ordered             Approved & Released             Approved & Ordered
  Net Cost: $450                 Net Cost: $8,500                Net Cost: $1,950

Here is how the procurement math breaks down for the slab portion:

• Raw Slab Material (Opustone): $4,500 trade cost. You apply a 30% markup ($1,350), bringing the client price to $5,850.
• Fabrication & Template Fee: $4,000 net cost. You apply a 20% coordination fee ($800), bringing the client price to $4,800.
• Total Landed Cost to Client: $10,650.

Before you pay the deposit to reserve that $4,500 slab, you must have the signed approval for the $450 Kallista rough-in valve from Farrey's. If the client decides to change the faucet layout after the stone is templated, the $4,000 fabrication fee is entirely wasted—and you may ruin the slab.

Lead times also dictate this sequence. The imported Italian floor tile might have a 14-week lead time, while the plumbing rough-in valves are available locally in three days. By staging your approvals, you can release the plumbing PO immediately so the contractor can close the walls, while keeping a close eye on the tile shipment tracking to coordinate the tile setter's schedule.

Organizing by room instead of vendor

Most designers are accustomed to looking at purchase orders by vendor. You might have one massive PO for your plumbing distributor, another for the tile showroom, and a third for the stone yard.

While this works for your accounting software or your QuickBooks records, your client does not think in vendors. They think in rooms.

When you present a $45,000 package for "Guest Bath 3," the client needs to see the Carrara mosaic, the brass shower head, and the vanity slab together. This context helps them understand the design intent and sign off on the budget.

If you are using manual spreadsheets or older design software, you likely spend hours copying and pasting line items into custom PDF presentations just to show this room-by-room view. If a client rejects a single tile option, you have to manually recalculate the entire room budget, update your spreadsheet, and regenerate the PDF.

Grouping your specs and approvals by room-level packages allows clients to visualize the complete space and approve budgets with clarity.

Managing the logistics of slab reserves and dye lots

In South Florida, high humidity and salt air mean material selections require precise documentation. When you select three slabs of Calacatta Lincoln at the slab yard, you cannot rely on memory or loose paperwork to track the details.

You need to document:

• The specific bundle numbers (e.g., Bundle #4829, Slabs 12-14)
• The reserve expiration dates—slab yards in Miami and West Palm Beach rarely hold stone for more than 14 days without a deposit
• The fabrication templates and vein-matching layouts
• The specific sealer required for high-humidity environments

If these details live in a designer's text thread or a loose email, they will inevitably get lost before install day. Keeping your slab bundle numbers, yard contact notes, and fabrication templates tied directly to the room's product spec sheet ensures that everyone on your team—and the contractor on-site—is looking at the same information.

How Alcove keeps your wet-area specs and approvals in sync

Instead of digging through separate folders for plumbing specs and stone quotes, Alcove gives your team one organized system for your entire procurement workflow.

Alcove lets you group products by room, share curated approval packages with your client via the client portal, and track the exact status of every valve, tile, and slab.

When you use the Alcove Chrome Clipper to source a faucet or a tile, all the spec data, tear sheets, and pricing details pull directly into your project workspace. From there, you can organize the items by room, set your markups, and send a clean, professional presentation to your client for digital sign-off.

Once approved, you can generate purchase orders and track shipments with automatic updates for FedEx, UPS, and USPS. You can manage the entire process from initial spec to final install without losing track of a single detail.

Price with clarity. Install with confidence.

See how we do it at alcove.co.

FAQs

How do you handle client changes to plumbing fixtures after the tile has been ordered?

This is where staging dependencies is critical. If a client wants to switch from a widespread faucet to a wall-mount faucet after the tile is on-site, it often requires tearing out drywall and re-routing copper. In Alcove, you can mark plumbing rough-ins as 'Locked' once approved, signaling to the entire team that any further changes will incur a formal change-order fee and delay the tile installation.

Should I show the client the slab fabrication cost separate from the material cost?

Most luxury studios present a single landed cost to the client that includes the raw slab material, template fees, fabrication, and installation. This prevents the client from trying to line-item negotiate the fabricator's labor. You can track your internal trade costs and fabricator quotes privately in Alcove while presenting a clean, all-inclusive price to your client for approval.

How do we track lead times for imported Italian tile without delaying the plumber?

Imported tile often carries a 12-to-16 week lead time, while plumbing rough-in valves might be available locally in 3 days. Track these differing lead times directly on the product cards in your project workspace. This allows you to release the plumbing PO immediately so the contractor can close the walls, while keeping a close eye on the tile shipment tracking to coordinate the tile setter's schedule.