MSI Quartz and Stone Surfaces: A Procurement-Focused FAQ for Contractors and Designers

If you're a contractor or designer, you've probably gotten ten different opinions on stone surfaces before breakfast. This FAQ is not another list of 'premium quality' claims. I've spent six years tracking material costs and vendor performance for our company, and I'm the person who checks whether the quote actually matches what gets invoiced. These are the questions we ask before writing a check.

1. What is MSI quartz?

MSI International Surfaces distributes natural and engineered stone — quartz countertops, granite, marble, slate tile, and engineered flooring. MSI quartz is an engineered product, roughly 90% crushed natural quartz mixed with resins and pigments. It's a consistent, low-porosity surface that works well in kitchens and baths.

One thing I tell people: 'low maintenance' does not mean 'no maintenance.' You still need to clean up spills, avoid setting hot pans directly on the surface, and use a cutting board. If someone markets a product as 'maintenance-free,' ask for that in writing. Per FTC Green Guides, environmental and performance claims need to be substantiated — and that's a good procurement habit, not just a legal nicety.

2. Why choose MSI quartz over granite?

It depends on what your client actually needs. Quartz gives you consistent color and veining and doesn't need periodic sealing. Granite tolerates heat better and offers natural movement that a lot of clients love. Neither is 'the best' stone. There is only the best fit for the project.

That's not a cop-out. In 2023, I spec'd quartz for a multifamily renovation because matching slabs across 40 units was essential. For a custom fireplace surround, we chose granite because the client wanted natural characteristics and was willing to seal it. Same brand, different materials — both were right.

If you're buying MSI quartz, you're buying from a company with a wide distribution network and showrooms, which helps when you need to see slabs before a big order. But there's no guarantee you'll get an exact color match across batches. If matching matters, order all your material at once and confirm the lot numbers.

3. How do I compare MSI quartz quotes without hidden costs?

Don't just compare slab prices. I've flagged 'low price' quotes that didn't include mitered edges, sink cutouts, backsplash, or delivery. By the time you add those, the quote is often higher than a competitor's all-in price.

Here's the minimum I ask every fabricator to itemize:

• Slab cost per square foot (and which slabs are included)
• Fabrication and edge profile
• Cutouts for sinks, cooktops, and faucet/shower valve holes
• Seams and finishes
• Delivery, installation, and any minimum-square-footage charges

In Q2 2024, I compared three quotes for a 120-square-foot kitchen. Two fabricators listed the same slab price, but one charged $350 extra for sink cutouts and $600 extra for delivery. That's a 9.5% difference on a $10,000 job — hidden in the fine print.

Part of me wants to consolidate all our work with one fabricator to get volume pricing. Another part knows that having a backup vendor saved us during the slab shortage in 2021. So I keep one primary and one approved secondary. It's a bit more paperwork, but it keeps quotes honest.

4. Can I use MSI quartz on shower walls? What about the shower valve rough-in?

Yes. Many of MSI's quartz slabs work well for shower walls. But the material is only part of the equation. The substrate and the rough-in details determine whether it looks great or leaks.

My biggest lesson came from a shower valve. I assumed the rough-in height and valve body depth were the same as the shower I'd done a month earlier. I didn't check the manufacturer's spec sheet because we were running late. The valve body was longer than the old one, and the trim wouldn't sit flush against the stone. We had to open the wall, move the plumbing, and redo a section of waterproofing. That was a $1,200 mistake that could have been avoided with a 10-minute call to the valve supplier.

If you're installing quartz panels around a shower valve, get the exact rough-in spec first. Make the cutout slightly larger than the trim, then use a waterproofing membrane and backer board. And always do a dry fit of the valve trim before setting the stone.

5. Can I clean MSI quartz with glass cleaner?

In most cases, you don't need to. Warm water and a drop of dish soap handles 95% of everyday residue. If you're trying to remove streaks or hard water spots, some glass cleaners are okay on polished quartz, but avoid formulas with acid, bleach, or abrasive particles.

Matte or honed finishes are the tricky ones. I've seen a contractor use a lemon-scented glass cleaner on a matte dark quartz, and it left a dull mark. The fabricator was able to polish it out, but it took time. Rule of thumb: check the MSI care guide for the specific finish. When in doubt, spot-test in an inconspicuous area.

Honestly, the 'glass cleaner question' comes up because people want a fast way to make a kitchen look finished. That's understandable. But a 30-second wipe with soapy water is safer than risking a $400 repair.

6. Do I need to patch a hole in the wall before installing an MSI backsplash?

Yes — especially for tile. If you're wondering how to patch a hole in the wall before a backsplash, it's not complicated: cut out a square around the hole, insert a backing piece of wood or drywall, screw in a clean patch, tape, compound, and sand flat. The goal is a smooth, rigid surface behind the tile.

Why is this so important? A hole or low spot behind a large-format tile can cause the tile to flex during install, creating lippage or cracks later. I learned this the hard way when an old electrical box had been recessed too far behind a 12x24 porcelain tile. A month later, the grout at that joint cracked.

If you're setting a quartz slab backsplash, the wall tolerance is different, but you still want a flat plane. Patch the hole rather than hoping the adhesive will bridge it.

7. Is MSI in 'MSI Pro MP341CQ specs' the same MSI that makes quartz?

No. This is a common confusion, and I'd rather clear it up than let you waste time. MSI International Surfaces makes and distributes natural stone and engineered surfaces. MSI Pro MP341CQ is a computer monitor made by Micro-Star International — a completely separate company. If you're searching for MSI Pro MP341CQ specs, you want details like resolution, refresh rate, and ports, not slab thickness.

If you're looking for MSI quartz countertops, tile, or flooring, you're on the right track. It's just one of those 'same acronym, different industry' situations.