Epoxy grout vs cement grout for Florida showers, kitchens and floors

Epoxy grout vs cement grout: which one should go in your shower, your kitchen and your floors? Use epoxy where water, soap and food sit on the grout every day, which means showers and the busiest kitchen surfaces. Use cement grout almost everywhere else, because it is easier to install, easier to repair and does the job well on most floors.

That is the short answer. The rest of this guide explains why, so the choice makes sense when you are standing in the showroom with a tile in your hand and a grout chart beside it.

What is the difference between epoxy grout and cement grout?

Cement grout is the traditional kind: Portland cement, fine sand for wider joints or none for narrow ones, pigment, and often a polymer additive. It is mixed with water, packed into the joints and left to cure. Once it has cured it is hard, but it is still porous, the way a concrete sidewalk is porous. Water, oils and anything coloured can soak into it.

Epoxy grout is a resin and a hardener mixed with a filler and pigment. It does not dry; it cures by a chemical reaction between the two parts. The result is dense and non-porous, so water and stains stay on the surface instead of soaking in. That one property is behind almost every advantage epoxy has, and its main drawbacks come from the chemistry too.

There is a middle ground worth knowing about. Many cement grouts are now sold as high-performance blends with more polymer in them. They resist stains better than plain cement grout and are still installed and repaired the same way. For a lot of rooms they are the practical choice.

Why does grout matter so much in a Florida house?

Grout is a small part of the surface and a large part of what you see when a floor or a shower starts to look tired. A dark line along the bottom of a shower wall, a grey haze in the joints of a white kitchen floor, a spot by the stove that never quite comes clean: that is the grout, not the tile.

Florida makes it harder. Showers in a humid house dry slowly, and in a house that is closed up for the summer they can stay damp long after the last shower. Porous grout holds that moisture, and mildew grows on the surface. Epoxy does not soak up the water, so whatever grows on it stays on top and cleans off.

One thing neither grout does is keep water out of the wall. Grout is not the waterproof layer in a shower. The membrane behind the tile is, which is why the waterproofing on a bathroom tile job is its own line on the proposal. Choose epoxy for how it wears and cleans, not to stop a leak.

Where is epoxy grout worth it?

Epoxy earns its place wherever the grout is wet or dirty every day, and wherever it would be hard to keep clean otherwise:

• Shower floors and the lower part of shower walls, where water and soap sit longest.
• Shower niches and benches, where bottles leave rings and water collects.
• Kitchen backsplashes behind the cooktop and sink, where grease and splashes land.
• Tiled countertops and bar tops, if you have them.
• Light grout on a busy floor, such as a kitchen or a mudroom by the pool door, where cement grout would darken in the traffic lanes.
• Mosaics and small tile, where there are so many joints that the grout is a large share of the surface.

The colour is a quieter advantage. Cement grout can cure a little lighter or darker in places, depending on how much water was in the mix and how fast each joint dried. Epoxy cures to an even colour, which matters most with a strong or very light grout colour that shows every variation.

Do you need to seal epoxy grout?

No. Epoxy grout does not need a sealer, and a sealer has nothing to soak into. Applying one only leaves a film on the surface. Cleaning is warm water and a pH-neutral cleaner, the same as the tile.

Cement grout is different. Because it is porous, it is usually sealed once it has cured, and resealed on the schedule the grout maker recommends. That is easy to do, but it is a job that has to be remembered. If you know nobody will reseal the shower, that alone is a fair reason to choose epoxy there.

When is cement grout the better choice?

For most floors in a house, cement grout is the right grout, and it is not a compromise. It works well wherever the room is not a wet room.

It is the better choice when:

• The room is dry most of the time: living areas, bedrooms, hallways and most of the floor in a bathroom outside the shower.
• The grout colour is mid-tone or close to the tile, so a little darkening over time will not show.
• You may want to change or repair the floor later. Cement grout can be raked out of one joint and replaced without lifting the tile. Epoxy has to be cut out, and a patch rarely matches.
• The tile is a porous natural stone. Epoxy can leave a stain or a haze on some stones, so stone is grouted with whatever the stone's maker recommends, and a test piece comes first.

Cement grout is also more forgiving to install. That matters less to you than to the crew, but it shows up in the result: there is more time to tool each joint neatly.

Why does epoxy grout take longer to install?

Once the two parts of epoxy are mixed, the clock is running. The installer has a limited working time to fill the joints and clean the face of the tile before the resin starts to set. Any film left on the tile cures with it and is very hard to remove later. So epoxy is mixed in small batches, worked in small areas, and cleaned with more care than cement grout needs.

That extra time is labour, and it shows up on the quote. It is one of the lines worth reading when you compare quotes, the same way you would read the waterproofing line. Our guide to what a tile quote includes goes through those lines one by one.

Can you mix both in the same bathroom?

Yes, and it is often the best answer. A common approach is epoxy in the shower and cement grout on the rest of the bathroom floor, matched in colour so the change does not show. The shower gets the stain resistance it needs; the larger, drier floor gets a grout that is easy to look after and easy to repair.

The same thinking works in a kitchen: epoxy on the backsplash behind the cooktop, cement grout on the floor. What matters is that the decision is made room by room, before the tile is ordered, not on the day the crew arrives.

How we decide it with you

Grout colour and grout type are settled in the showroom with the tile in front of you, at the same time as the trims and the layout. We'll walk you through where each grout belongs in your plan, and the grout is written into the proposal so it is not a surprise later.

Because we sell it and we install it, the person helping you choose works with the crew that does the tile installation, and the crew is ours. When the job is done, the care guide you get is written for the grout that was actually used, so you know whether yours needs sealing at all.

What happens next

If you are planning a shower, a kitchen or a whole floor, bring the plan to the showroom in Bradenton, or call (941) 253-0400. You can see the porcelain tile at full size and take samples home. When you are ready, send us your plans for a quote, and the grout choice will be written into it.