What 7 questions should you ask before choosing bathroom tiles?

What 7 questions should you ask before choosing bathroom tiles?

Intro: why a short checklist prevents costly mistakes

Bathroom tiles look simple in a showroom, but decisions about format, technical specifications and installation change cost, safety and long term performance. This article gives seven concrete questions to take to a tile supplier or showroom so you can confirm a tile is safe and suitable for each bathroom location before you buy. Bring these questions to a store visit or a consultation so you leave with facts and documentation, not just impressions.

1. Is this tile rated for the exact bathroom locations I plan to use it in?

Ask the salesperson for the product data sheet or technical bulletin and check that the manufacturer explicitly lists each intended location: bathroom floor, shower floor, shower walls, bathtub surround and wet walls. Plan the bathroom as a system and confirm the documentation supports every one of those locations rather than assuming a tile pictured on a wall can be used on a floor. For guidance see the VM Tiles bathroom tile decision guide at Bathroom tile decision guide | VM Tiles.

How to read the product data sheet

Look for a clear table or statement that includes recommended uses. If the sheet lists only walls and not floors, do not assume it is safe for floor traffic. Photograph or request a digital copy of the data sheet so you can verify manufacturer recommendations later.

When one tile can cover the whole bathroom

If you want a single tile for floors and walls, make sure the data sheet lists both uses and the water absorption and wear classes needed for floor applications. If the documentation does not cover wet areas or shower pans, pick a different product or accept a mixed-material solution.

2. What are the PEI, COF and water absorption ratings for this tile?

These three specifications tell you whether a tile will wear, slip or absorb moisture in the bathroom. Ask for the numeric values and write them down so you can compare products.

PEI explained and what to request

PEI is a hardness and wear rating for glazed tiles. For residential bathroom floors you typically want a PEI rating suitable for foot traffic. Confirm the product's PEI class on the technical sheet so it matches the expected use. The Bathify guide identifies PEI as one of the key specs for durability on bathroom floors, see Bathroom Tile Ideas: Best Picks for Floors, Walls & Showers (2026) | Bathify.

COF numbers and slip resistance

COF stands for coefficient of friction and indicates slip resistance. Wet areas need higher COF values. Ask the supplier for the COF or R-rating and for the test standard used. Do not rely on the phrase "non slip" without a test value because lab results and surface finish determine real performance.

Water absorption categories and why 0.5% matters

For floor and wet applications, confirm the tile's water absorption category, for example impervious or vitreous. Impervious tiles commonly have water absorption of 0.5% or less. Ask the retailer to cite the manufacturer classification on the data sheet, because low absorption reduces staining and moisture issues in showers and around tubs. For practical tips on absorption check the Naybur article at How to Choose Bathroom Tile and Flooring That Actually Lasts | Naybur Contracting.

3. Which format, finish and grout colour are you recommending and why?

Upstream design choices drive layout complexity, apparent grout lines and slip performance. Before finalising a product, force the conversation about format, finish and grout.

How tile size changes layout and labour

Large formats reduce grout lines, but they can increase labour, substrate tolerance demands and waste. Ask for mockups or layout drawings that show how many cuts will be required and whether special installation techniques are needed for large panels.

Finish trade-offs and slip risk

Surface finish affects slip. Matte or textured finishes tend to perform better in wet areas than polished finishes. Confirm the recommended finish for floors versus walls and ask for COF test data if the finish is critical to safety.

Grout colour and long term maintenance

Decide grout colour early because joint contrast changes the visual scale of the room. Choose a grout that balances aesthetics and stain resistance, and ask about stainproofing or epoxy grout options for showers to reduce maintenance.

4. Can I take samples home and how will they look in my lighting and with my vanity?

Tiles and samples look different under home lighting and against your fixtures. Seeing material in context is essential. Experts recommend testing tiles at home to check shade variation and texture underfoot.

How to test samples at home

View samples at different times of day and under the bathroom's artificial lights. Place a sample next to your vanity, towels and paint, and photograph it from the usual standing eye height. Check multiple pieces to assess natural variation within a batch.

What to ask the showroom

Request take-home samples and a free quote. Metro Tiles & Flooring in Brampton offers take-home samples and in-store product guidance, which makes evaluating tiles in your own light convenient. If you need fixtures such as bath tubs in the decision process bring or photograph them with tiles to check scale and colour matching.

5. What does the total project price include: product, prep, removal, trims and installation?

Budget early and get an itemised written quote. Price influences decisions from tile category to installation method, and cheaper tiles can become expensive when the subfloor needs significant work. Kingston Brass reminds buyers to know their budget before tile selection so choices match what you can afford, see Choosing the perfect tiles for your bathroom | Kingston Brass.

Common hidden costs

• Subfloor repairs, level adjustments or backer board
• Old floor removal and disposal
• Waterproofing membrane in showers and wet areas
• Specialty trims, thresholds and rectified edges
• Higher labour on complex layouts or large-format tile

What to request in writing

Ask for a written estimate that lists materials, labour rates, removal and disposal, waterproofing, grout and sealants, trims and taxes. Confirm whether grout sealing is included and whether installation warranties are provided.

6. Do you provide condo-compliant soundproof underlayment and documentation if I need it?

If you live in a condominium, check building rules first and then confirm the supplier can specify and install an underlayment system that meets the board's criteria. Metro Tiles & Flooring offers guidance on condo soundproof underlayment and can advise on compliant solutions; always verify requirements with your board in writing.

What to ask your condo board

Request the board's letter or bylaw that describes acceptable impact insulation class or the required underlayment system. Do not rely on verbal assurances from the store without written confirmation from your condo board.

Installer certification and documentation

Ask the retailer or installer whether they will provide a written compliance statement or certificate after installation. Ensure the named underlayment product has manufacturer performance data so your board can evaluate it.

7. What warranties, workmanship guarantees and maintenance instructions apply to this tile and installation?

Confirm what the manufacturer warranty covers and what the installer will guarantee. Warranties often have conditions such as professional installation or specific cleaning methods, so ask for the exact wording and any exclusions.

What to get in writing

Obtain copies or links to the manufacturer's warranty and a written workmanship warranty from your installer. Ask how long each covers you, and whether either requires particular sealers, cleaners or maintenance schedules to remain valid.

Routine maintenance and products to avoid

Ask for recommended cleaning products and what to avoid, such as abrasive cleaners that can dull finishes or solvents that affect grout. A clear maintenance plan helps preserve slip resistance and appearance. For more on manufacturer guidance see the VM Tiles decision guide at Bathroom tile decision guide | VM Tiles.

Quick technical checklist to screenshot

• Product data sheet on file for each intended location
• PEI class noted for floor tiles
• COF or R-rating documented for wet areas
• Water absorption category confirmed (impervious commonly 0.5% or less)
• Written, itemised installation quote
• Condo underlayment product name and compliance statement if required
• Manufacturer and workmanship warranty copies

Frequently asked questions

What does PEI rating mean and what PEI do I need for a bathroom floor?

PEI measures wear and abrasion resistance for glazed tiles. For residential bathroom floors choose a PEI rating appropriate for foot traffic. Ask the supplier for the tile's PEI class on the technical sheet and confirm it matches your expected use.

How do I interpret COF numbers and can I test slip resistance at home?

COF is a numeric coefficient of friction or an R-rating from lab slip tests. Compare the COF values supplied by manufacturers and ask which standard was used. Testing at home is not reliable without equipment, so request the lab test data from the manufacturer.

Can I use the same porcelain tile for the floor, shower wall and bathtub surround?

Yes, if the manufacturer data sheet explicitly lists those uses and the water absorption and COF meet the requirements for floor and wet areas. Always verify the product documentation before committing to a single tile for multiple applications.

How much extra tile should I order for cuts, waste and future repairs?

Typical overage ranges from 7 percent to 15 percent depending on layout complexity and tile size. Ask your installer for a recommended waste allowance based on the chosen tile format and pattern.

Do condo boards require a specific underlayment certificate and who provides it?

Condo boards vary. Request the exact requirement from your board and then ask the supplier or installer to provide the named underlayment product information and a written compliance statement after installation. Do not assume verbal confirmation is sufficient.

Next step

Bring this checklist and your measurements to a showroom visit. Metro Tiles & Flooring in Brampton offers take-home samples, free quotes, guidance on condo soundproof underlayment, and professional installation and delivery across the GTA. If you want to compare tiles beside fixtures such as bath tubs, bring images or visit their product selection for a hands-on consultation.

Final CTA: Ready to test samples and get a free quote at Metro Tiles and Flooring?