What to Look for in a Tile, Brick Veneer & Mortar Mix Supplier: A Quality Inspector’s Checklist

You're sourcing tile, brick veneer, and mortar mix for a commercial project. Probably not the first time. But even experienced buyers get burned by a shipment that looks right in the showroom and wrong on the job site. I'm the quality compliance manager at Marazzi. I review every Marazzi tile and building material batch that reaches our distributors — roughly 500+ shipments per year. In 2025, I rejected about 8% of first deliveries from new vendors. Not because the products were terrible. Because the specs didn't match what was promised.

This checklist is for distributors, contractors, and purchasing managers who need a fast, repeatable way to vet a ceramic tile, brick veneer supplier, or mortar mix supplier. It's not about finding the cheapest price. It's about finding the lowest total cost. Here are the five things I check before committing to any bulk order.

1. Verify the spec sheet against the job site, not the brochure

First thing I do is turn the marketing claims into measurable numbers. For a ceramic tile — including a handmade-look product like Marazzi Zellige tile — I ask for nominal dimensions, thickness, flatness, water absorption, and PEI rating. For brick veneer, I need the size tolerance, splitting variation, and how many shades are in a blend. If a mortar mix supplier can't provide a full data sheet, that's a red flag. The thing to look for in a mortar mix supplier is hard numbers: compressive strength, open time, pot life, and the temperature range for application.

Here's the mistake that taught me this. I once assumed a “same spec” tile from two different suppliers would look and perform the same. Didn't verify. The first supplier's “rectified” tile was actually 1 mm off their own documented width. That doesn't sound like much, but after 30 pieces, the grout joints drifted into a visible taper. The installers had to cut every edge. That rework cost more than the tile itself.

So: ask for the COA (Certificate of Analysis) and compare it to your actual project requirement. If your spec says "plane deviation ≤ 0.5mm," see that number on the sheet. Don't accept a vague “meets industry standards.” Industry standards are a floor, not a ceiling.

2. Sealed sample first, then blind-test the production sample

A sample is a tiny window into a huge production run. Smart suppliers know how to make that window look good. That's why I always request a sealed sample — a piece from a current production lot that they're willing to stand behind. Then, when the actual production sample arrives, I run a blind test with our project team.

Here's the drill: put the approved sample and the production sample side by side under the same light. Don't tell anyone which is which. Ask your installers or designers to identify the “better” one. If they can't reliably tell them apart, you're good. If they pick the same one consistently, there's a real difference — and you need to decide if it matters.

For a product like Marazzi Zellige tile, the handcrafted irregularity is the selling point. But “handcrafted” doesn't mean “unpredictable.” There's a tolerance range. I've seen buyers reject a beautiful batch simply because the variation didn't match the sample—usually because nobody told them what range to expect. (Mental note: always photograph samples under the exact lighting of the project space. Warehouse lighting lies.)

3. Inspect the supplier's quality control — and demand evidence

Any supplier can say “we have strict QC.” But if they can't show you how it works, it probably doesn't work. In our audits, we ask three questions:

First, can you trace any batch back to its raw material lot? If the answer is no, you'll never know why a problem happened. Second, how many pieces do you inspect per batch and at what frequency? Ten pieces out of a thousand is very different from one piece out of a run. Third, what happens when a batch fails QC? Is it scrapped, reworked, or quietly sold to a discount buyer?

This is also where marketing claims meet the FTC's advertising guidelines. If a vendor calls their tile “eco-friendly” or “tile adhesive with superior bond strength,” they should be able to substantiate that claim with evidence. Ask for third-party test reports, not a glossy brochure. The vendors who can produce those reports are usually the ones who don't need to oversell.

4. Calculate total cost of ownership, not unit price

Here's the thing: the cheapest bid is rarely the cheapest order. I've seen a $1.10-per-square-foot tile quote turn into a $1.90-per-square-foot nightmare after freight, breakage, and rework. Meanwhile, a $1.35 quote from a supplier with consistent packaging and fast claims support saved the project thousands. That's the difference between price and cost.

The TCO table I use looks like this:

• Unit price per square foot (or per bag for mortar mix)
• Freight and delivery window — including the risk of delays
• Breakage rate — ask the supplier for their return rate data, not just a promise
• Rework cost if the product arrives out of spec
• Time cost: a two-week delay can erase a thin margin

I remember a $22,000 redo caused by a “great deal” on mortar mix. The bags looked identical, but the mix had a shorter open time than specified. The installers didn't notice until tiles started slipping. The new mortar cost 5% less per bag. The redo cost 40% of the original project budget. That's TCO in one ugly example.

5. Confirm packaging, loading, and claim procedures before you order

This is the step most buyers ignore, and the one that saves me the most headaches. It's not enough to know the price and lead time. You have to know how the product arrives and what happens if it doesn't.

A few years ago, we received a brick veneer order where every fifth pallet had crushed corners. The packaging was technically per the spec — but the loading pattern had heavy pallets stacked on lighter ones. The vendor said it was “not our problem” because the claim window had expired by the time we found it. We were two days late.

Before you sign, ask these questions:

• How is this product packed for long-distance or export shipment? Edge protectors? Shrink wrap? Corner boards?
• What's the maximum stacking height in the container or truck?
• Does the supplier cover transit damage, or is the freight company responsible?
• What's the claim window? 48 hours? 7 days? And does that start at delivery or at unload?

So glad I once asked about claim windows before a large order. I found out the supplier allowed only 48 hours to inspect, which meant we needed to schedule a full inspection of every pallet before the truck left. We planned for it. If we hadn't asked, we'd have eaten the cost of damaged material — something that's rarely covered by “free freight.”

Common mistakes that cost more than the material

Over the years, I've seen the same errors repeat. Don't rely on certifications alone. An ISO stamp doesn't guarantee color consistency between batches. Don't trust verbal promises about delivery dates — get it in writing, especially if you're paying for expedited freight. And don't assume “premium” means “no variation.” For natural-look tiles, variation is a feature. The question is whether the variation stays within the range you can live with.

Also, remember that no tile or mortar is truly “unbreakable” or “stain-proof.” If a vendor uses those absolute claims, walk away. Not because they're dishonest, but because they're overpromising — and the FTC would consider that a compliance issue if they can't back it up.

Finally, the most expensive mistake is treating supplier evaluation as a one-time event. Set your standards, audit each new vendor, and monitor every batch. The supplier who knows you're watching is a much better supplier. In my experience, that single habit has cut our rejected deliveries in half.