Glass Tile In Shower Problems: Causes, Fixes and Prevention

Glass tile can make a shower look brighter, larger, and more luxurious, but it is less forgiving than ordinary ceramic or porcelain tile.

The most common glass tile in shower problems aren’t caused simply because the material is glass. They usually come from choosing the wrong glass tile, using incompatible mortar or grout, poor waterproofing, insufficient mortar coverage, missing movement joints, or improper cleaning.

Problems can include cracked glass, loose tiles, visible adhesive marks, discoloration behind transparent tile, scratched surfaces, stained grout, and slippery shower floors.

The good news is that most of these issues can be prevented if the tile and installation materials are selected as a complete system.

Glass Tile Shower Problems at a Glance

Here is a list of its issues people are experiencing:

• THIN-SET LINES CAN SHOW THROUGH GLASS

One of the biggest differences between glass and opaque ceramic tile is that the installation behind glass can remain visible.

Clear and translucent glass may reveal:

• Trowel lines
• Mortar voids
• Uneven mortar thickness
• Dark patches
• Waterproofing color
• Mesh backing
• Adhesive inconsistencies

This can ruin an otherwise expensive installation even if the tile remains firmly attached.

CUSTOM Building Products recommends a bright white glass-tile mortar for clear, iridescent, and translucent glass because the white background helps maintain a clean and consistent appearance.

For transparent glass, mortar ridges may also need to be flattened and the tile properly bedded so you don’t see striped trowel patterns through the finished wall.

This is why glass tile requires more attention to mortar coverage than many opaque tiles.

• INSTALLATION DIFFICULTY

If you’re familiar with glass tiles in the toilet, you should already know that it is one of the most difficult tiles to install.

You’ll need the help of an expert to install it successfully. The reason is that glass tiles are fragile.

Hence, it takes expert installation practice to install glass tiles so that you don’t end up cracking them while drilling, etc.

Also, you could cut class in an untidy manner and without the appropriate measurement. Installing a glass tile is not a job for a rookie.

You can’t install it even though you watch so many DIY videos on how to do it.

Otherwise, ugly accidents could occur which might be detrimental to you, your family, your guests.

• GLASS TILE IS NOT YOUR SHOWER WATERPROOFING

Glass itself doesn’t absorb much water, but that does not mean a glass-tile shower is automatically waterproof.

The waterproofing system is normally located behind the tile assembly.

A properly built shower may use:

• Waterproof sheet membrane
• Liquid-applied waterproofing
• Waterproof foam backer system
• Approved shower pan or receptor
• Properly waterproofed penetrations
• Sealed transitions and connections

Grout and tile are the finished surface—not your only defense against water.

If water reaches the wall cavity because the waterproofing system failed, replacing grout alone won’t necessarily fix the problem.

Signs of a more serious moisture problem include:

• Persistent dampness
• Mold odor
• Swollen wall materials
• Water stains outside the shower
• Loose tiles over a larger area
• Repeated grout or caulk failure

Those symptoms deserve further investigation before simply regrouting.

• IT LACKS SCRATCH-RESISTANCE

One of the cons of glass tile in a shower that you might hear people complain about is how much glass tiles lack scratch resistance.

One minute, you jump in the bathroom, thrilled about how much comfort and beauty you’re about to bask in. A very similar problem like glazed porcelain tiles.

But you most likely won’t feel the same again once you’re out of the glass-tiled bathroom, and you have to revisit it, especially if you share the bathroom with other people or family members.

What used to be a beautiful transparent glass tile would quickly turn into a wall full of smudges, fingerprints, and a collage of water and lather spots. Every mark you leave on this glass tile would be out in the open.

Trust me; nobody likes that.

• IMPERFECTIONS ARE VISIBLE

Compared to ceramic tiles or other shower tiles, Glass tile is transparent, and I don’t only mean that in terms of description but terms of character.

Every little imperfection in its installation would be visible to even the least observant person. There’s just no way to hide that imperfection, and it is no thanks to their reflective surface.

That’s why, if there’s a crack in the toilet or a weird stain, you’ll already see it through the transparent tiles. Aside from that, there’s no way to hide soap lather that sticks on glass tiles or walls in the bathroom.

Unlike Opaque tiles, glass tiles are extremely revealing.

• SLIPPERY

If you’re obsessed with glass tiles and you’re positive it’s the only thing you want to see in your bathroom, you should know that it can get slippery. It can pose a great danger to you or anyone who uses your bathroom when that happens.

Unless your glass tile is fall-proof, it poses a serious risk. Of course, there are different things you can do to address this problem, but at the very least, glass tiles seem to be the only tile type with the slippery issue.

• LOOSE OR POPPING GLASS TILES

Glass is non-porous, which is one of its advantages in a shower.

But that low porosity also makes bonding more demanding.

Mortar doesn’t absorb into glass the way it can interact with more porous materials. You need a setting material capable of bonding effectively to the smooth glass surface.

MAPEI specifically notes that glass’s low porosity and smooth surface create bonding challenges and recommends specialty setting materials for glass installations. (mapei.com)

Tiles may loosen when:

• The wrong adhesive was used
• Mortar wasn’t suitable for glass
• Mortar skinned over before the tile was installed
• The tile didn’t receive adequate mortar contact
• The wall wasn’t properly prepared
• Movement stresses exceeded what the assembly could accommodate

If several tiles are becoming loose, don’t simply glue them back individually.

A widespread bond failure may mean the installation method itself needs investigation.

• MIGHT BE EXPENSIVE

It’s wonderful to admire beautiful things. Truthfully, glass tiles are beautiful. They give you that same feeling you get when you visit a spa.

More so, they contribute to the overall aesthetics of your bathroom. So, it’s not surprising that you’ll want to decorate your bathroom with glass tiles.

However, while you admire glass tiles in people’s houses and hotels, you should also know that high-quality glass tiles are pretty expensive. If you don’t think they are expensive, we can agree that ceramic options are cheaper than glass tiles.

If you’re working with a budget to remodel your bathroom, you should probably consider ceramic tile options- except if the price of glass tiles is fair and affordable for you.

Solutions To Your Glass Tile Issues

Now that you have an idea of some of the problems you might encounter with Glass tiles, let’s talk about some of the solutions for the problems.

• INSTALLATION PROBLEM

One of the easiest ways to fix the installation difficulty you’ll encounter with glass tiles is to pay an expert to install them for you.

Certain practices have to be adhered to when installing glass tiles.

An expert knows how to adhere to these practices without an issue. But if you did it yourself, you probably won’t install it right.

Aside from adhering to strict installation practices deployed by experts, there are other things you should consider before you initiate an installation.

You have to consider the quality and type of glass you’re about to install in your bathroom, for starters. The reason is the different glass tiles that exist are suitable for different occasions.

In other words, a glass tile that’s suitable for your hair styling store might be a bad choice for your bathroom. To this effect, you have to choose the perfect glass tile for your bathroom, which is the first installation mistake you should avoid.

There are three different glass types: the low-temperature coated glass tile, the cast glass tile, and the fused glass tile. Another thing you should think of to avoid installation problems is the item you’ll use to create a strong bond.

• IMPERFECTION AND SCRATCH RESISTANCE

The fact that glass tiles aren’t scratch-resistant shouldn’t deter you from investing in them. You could always find your way around the visible imperfection and the lack of scratch resistance.

For starters, clean your bathroom regularly and change what needs to be changed from the wall tiles to the ugly cabinet, etc., so you have a perfect bathroom that looks attractive when anyone looks through the glass tiles into the bathroom.

Regarding the scratch resistance, ensure you clean the glass tiles regularly. But do not clean with the regular cleaners. Eventually, they’ll make your glass tiles look dull and less attractive.

It would help if you got abrasive cleaners to maintain the original state and beauty of the glass tile.

• SLIPPERY TENDENCY

While glass tiles tend to become slippery over time, you can always manage it to get rid of the slippery tendency. First off, ensure that you do not install random glass tiles.

The first thing to conquer the slippery problem is installing glass tiles with a matte finish.

Preferably, opt for smaller mosaic tiles as they add to the aesthetics, and they won’t get slippery in a long while. It would help if you also considered buying an effective anti-slip or slip-resistant sealant.

If you want to for such glass tile shower, watch this video first.

How to Avoid Glass Tile Shower Problems?

Before installing, I recommend this checklist:

• Confirm the glass is approved for the intended wet-area application.
• Use a mortar specifically approved for that glass tile.
• Prefer a consistent white setting bed with clear or translucent glass when specified.
• Prepare a flat, stable substrate.
• Build the waterproofing correctly before tiling.
• Achieve adequate mortar coverage.
• Avoid visible trowel ridges behind transparent tile.
• Follow movement-joint requirements.
• Use compatible grout.
• Use flexible sealant at required movement joints.
• Select floor-rated glass for shower floors.
• Clean with non-abrasive products.
• Keep extra tiles for future repairs.

Spending more time checking compatibility before installation is far easier than trying to correct a failed glass shower afterward.

CONCLUSION

I can picture the broad smile on your face by merely seeing these glass tile installation problems highlighted along with their situation.

Somewhere in the corner of your mind, you can feel the relief steal the core of your heart as you can finally opt for the glass tiles you’ve always wanted.

Well, while that is good, you should get an expert opinion on the type of glass tile that’s perfect for your bathroom condition.

It would be best if you also considered letting the expert do the installation so you’ll avoid those problems in the nearest future.