The Real Value of Getting It Right
When we install a shower, we often think about the design, the finish, or even the layout first. However, one detail that’s easy to overlook is the thickness of the glass. We’ve seen how small choices like this can affect the lifespan, performance, and safety of a shower enclosure. Therefore, understanding what thickness actually means for your setup is key.
In other words, glass thickness is more than just a measurement—it’s about comfort, reliability, and how your shower performs every day. Let’s walk through why this detail matters more than people usually think.
Understanding Standard Glass Thickness Options
Most modern custom shower doors are made from tempered glass, but not all tempered glass is created equally. Generally, you’ll find three common thicknesses available: 6 millimetres, 8 millimetres, and 10 millimetres. Each has its purpose, and each behaves differently once it’s installed.
For instance, 6-millimetre glass is lightweight and cost-effective. Therefore, it’s often used in framed shower setups where the metal frame supports the structure. On the other hand, 10-millimetre glass is thicker and heavier, and it’s the standard choice for frameless systems due to its strength and rigidity.
We usually recommend going thicker for any frameless or semi-frameless installation. That is to say, the more glass is left unsupported, the more it needs to hold its own weight. A thicker pane gives you that extra peace of mind.
Durability Starts with Structure
Thicker glass means more mass, and more mass generally translates to higher durability. To clarify, the strength of tempered glass increases with its thickness. That means it’s less likely to crack or shatter under sudden impact or everyday stress.
Likewise, thicker glass resists warping or bowing over time. Thin panels may flex slightly when opening or closing doors. Consequently, this can loosen hinges, seals, and brackets. Over time, that minor movement becomes a source of leaks or misaligned panels. In contrast, thicker glass stays solid in place and wears more predictably.
We’ve found that in busy households, especially those with kids, heavier panels stand up better to regular use. The durability simply pays off long-term—even if the upfront cost is slightly higher.
Weight and Hardware Compatibility
One thing that surprises many homeowners is how much the weight of the glass can affect the rest of the shower. For example, a 10-millimetre glass panel might weigh up to 30 percent more than a thinner one. That extra weight means the hinges, brackets, and handles all need to be sturdier.
Moreover, the way your walls are built can affect which thickness is suitable. Drywall alone cannot support heavy glass panels. So, we always suggest checking if there’s wood backing or reinforced framing where the hinges will be mounted. Otherwise, even the best custom shower doors won’t last as long as they should.
In addition, the floor or threshold must be able to handle the weight. It’s not something you want to ignore until after installation. We’ve seen many cases where glass started to slip simply because the anchor points weren’t rated for the load.
Noise and Movement: A Quiet Upgrade
Surprisingly, thickness also changes how the glass behaves acoustically. Thicker glass naturally dampens sound. So, if you want a quieter, more spa-like feel in your bathroom, that extra few millimetres can make a noticeable difference.
Meanwhile, thinner glass tends to vibrate slightly when doors close, especially if the hinge system is not perfectly adjusted. You might hear a light rattle or feel a soft tremor. It’s not a safety issue, but it can make the shower feel less solid. In contrast, thicker glass adds that satisfying firmness when you open and close it.
The difference in feel is similar to shutting a hollow-core door versus a solid wood one. The latter always feels sturdier, and the same logic applies in the shower.
Aesthetics and Style Choices
In terms of appearance, both thick and thin glass can be beautiful. However, thicker glass often has a cleaner edge and a more refined look. Because it doesn’t need a full metal frame for support, it works better in frameless designs. As a result, your bathroom looks more open, modern, and seamless.
Framed enclosures, by comparison, rely more on the finish of the metal and less on the glass itself. So, if you’re choosing a minimalist design, going thicker allows you to avoid bulky frames and maintain that floating-glass effect.
We’ve noticed that many clients who opt for thicker glass also choose low-iron or ultra-clear glass to complete the look. The increased clarity works best with thicker panels since they allow the light to pass through without much distortion.
Maintenance, Cleaning, and Lifespan
Glass thickness can also affect how easy your shower is to clean and how long it will last. To be clear, any glass surface will need routine maintenance. However, thicker panels usually come with better coatings or surface treatments, since they’re installed in more premium settings.
Additionally, the joints and seals in frameless setups tend to collect less grime than framed ones. Since thicker glass supports these cleaner designs, you end up with fewer spots for mold or soap scum to build up. That simplifies your regular cleaning tasks and extends the life of the whole shower.
Further, when panels do need replacement after damage, thicker glass usually performs better under warranty due to its lower failure rate. This adds another layer of value over time.
When to Go Thin (and Why It Can Still Work)
Even though we often recommend thicker glass, there are times when thinner options are practical. For example, in small guest bathrooms or basements, a framed shower with 6-millimetre glass may be all you need. It’s lighter, easier to handle during installation, and puts less stress on supporting structures.
Similarly, if you’re trying to stay within a tight budget, using thinner glass in a framed setup can save money without major durability trade-offs. However, it’s important to match the design to the material. That means relying on strong frames and hardware that reinforce the glass.
We encourage clients to weigh their priorities: is it appearance, longevity, or cost? That decision will often guide which glass type makes the most sense.
Think Beyond the Panels
People tend to focus on the panels themselves, but we always look at the full shower environment. That includes water drainage, ventilation, wall condition, and how often the shower will be used.
For instance, in high-moisture areas, thicker glass is less prone to etching or mineral buildup. That’s because it often has a better seal and resists humidity better. In addition, the smoother edges of thick glass reduce the number of crevices where water might pool.
Before installation, we take time to evaluate not just what looks best but what will function best for years. That’s what makes the difference between a pretty upgrade and a lasting one.
Making an Informed Decision
At the end of the day, we’re not just installing a shower—we’re building something you use every single day. Therefore, it’s worth thinking through the thickness carefully. The durability you gain from even a slight increase can affect everything from safety to comfort.
To start exploring options for durable and modern custom shower doors, we’re happy to help you navigate your choices. Whether it’s a renovation or a brand-new build, we’re here to make the process smooth and well-informed.
If you’re not sure what your walls can support or how much weight is too much, we can walk through the site with you. For any personalized advice or to ask questions about your space, feel free to contact us directly.
FAQs
What is the most common thickness for frameless shower doors?
The most common thickness for frameless shower doors is 10 millimetres. It provides a strong structure without needing a heavy frame, making it ideal for modern bathrooms.
Does thicker glass really make a shower safer?
Yes, thicker glass resists impact and pressure better than thinner options. This means it’s less likely to crack or shatter, especially with regular use or accidental bumps.
Can I use thin glass in a frameless shower?
Technically yes, but it’s not ideal. Thinner glass is more flexible and needs structural support. Frameless designs work best with 8 to 10 millimetre panels.
Will thick glass be harder to install?
Thicker glass is heavier, so it does require more careful handling and stronger hardware. However, once it’s installed, it usually needs less adjustment over time.
How do I know what thickness is right for my bathroom?
It depends on your layout, wall support, and shower usage. A site visit can help determine the safest and most practical option for your specific space.