Understanding the Safety Standards for Shower Glass

When it comes to designing or remodeling a bathroom, the choice of shower glass plays a crucial role not only in the aesthetic appeal but also in ensuring safety. With the increasing popularity of glass enclosures for showers and baths, understanding the safety standards for shower glass has become paramount for homeowners, designers, and contractors alike. 

Understanding the safety standards for shower glass involves recognizing the importance of using tempered or laminated glass, complying with CPSC 16 CFR Part 1201 and ANSI Z97.1 regulations, and ensuring proper installation and maintenance to minimize the risk of injury.

This guide by a shower remodeling expert sheds light on the key aspects of shower glass safety standards, helping you make informed decisions for your next project.

Importance of Safety Standards

Glass, while offering sleek and modern design possibilities, poses unique risks, especially in wet and slippery environments like bathrooms. The primary concern is the potential for breakage, which can lead to serious injuries. 

Safety standards for shower glass are established to mitigate these risks by specifying requirements for the material, strength, and installation of glass used in shower enclosures.

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Types of Safety Glass for Showers

When selecting glass for shower enclosures, prioritizing safety is crucial due to the inherent risks associated with glass in wet and potentially slippery environments. Two primary types of safety glass are used in shower doors and enclosures: tempered glass and laminated glass. 

Each type has unique properties and safety features suitable for different applications in bathroom design.

Tempered Glass

Tempered glass, also known as toughened glass, is manufactured through a process of extreme heating followed by rapid cooling. This process significantly increases its strength compared to regular glass.

Safety Features:

  • Strength: It is approximately four to five times stronger than standard glass of the same thickness, making it more resistant to impacts.

  • Breakage Pattern: When it does break, tempered glass shatters into small, blunt pieces that are less likely to cause injury, unlike the sharp shards of regular glass.

  • Applications: Due to its strength and safe breakage pattern, tempered glass is the most popular choice for shower doors and enclosures. It is suitable for full-size doors, fixed panels, and any application where human impact is a possibility.

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Laminated Glass

Laminated glass is made by bonding two or more layers of glass together with an interlayer, typically made of polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). This interlayer keeps the glass bonded even when broken.

Safety Features:

  • Holding Broken Pieces: In the event of breakage, the interlayer holds the glass pieces together, preventing them from falling apart and reducing the risk of injury.

  • Impact Resistance: While also strong, the main advantage of laminated glass is its ability to maintain its integrity and barrier properties after impact, making it less likely to result in openings that could allow someone to fall through.

  • Sound Reduction: The interlayer provides added benefits such as sound reduction, making laminated glass an excellent option for bathrooms adjacent to high-traffic areas or in need of additional privacy.

Choosing Between Tempered and Laminated Glass


  • Safety and Compliance: Both types meet safety standards for use in shower enclosures. Specific regulations or codes might influence your choice in your area.

  • Aesthetic Preferences: Some designers or homeowners may prefer the appearance of one type over the other. For example, laminated glass can sometimes display a slightly different edge appearance or color due to the interlayer.

  • Functionality and Additional Benefits: Consider the need for sound reduction or concerns about potential impacts. Laminated glass offers superior performance for sound insulation and retains its barrier function even when cracked.

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Safety Standards and Regulations

In the United States, the Consumer Product Safety Commission (CPSC) has set forth regulations in the CPSC 16 CFR Part 1201, which covers safety standards for architectural glazing materials, including shower doors and enclosures. 

The American National Standards Institute (ANSI) also provides guidelines under ANSI Z97.1, a standard that specifies safety requirements for glazed shower doors and enclosures.

Key Requirements

  • Thickness and Strength: These standards dictate the minimum thickness and strength of the glass to ensure it can withstand normal impact and pressure.

  • Impact Testing: Shower glass must undergo rigorous impact testing to simulate real-world conditions, ensuring it does not break easily under normal use.

  • Fragmentation Test: For tempered glass, there is a fragmentation test that requires the glass to break into small, dull pieces to minimize the risk of injury.

  • Marking and Labeling: Safety standards also require that shower glass be permanently marked or labeled with the manufacturer's details and the type of safety glass, ensuring traceability and compliance.

Installation and Maintenance

Proper installation and maintenance are vital to the safety and longevity of shower glass enclosures. It's essential to follow the manufacturer's guidelines and work with experienced installers to ensure that:

  • The glass is correctly sized and fitted to avoid excessive stress.

  • Hardware and supports are securely fastened and appropriate for the glass type.

  • There is sufficient sealing to prevent leaks and moisture accumulation that could weaken the structure over time.

Regular maintenance, including checking for chips or cracks and ensuring seals and hardware remain intact, can prevent accidents and extend the life of your shower enclosure.

When selecting shower glass, consider not only the safety standards but also the aesthetic and functional requirements of your space. 

Tempered glass offers a balance of strength and safety for most applications, while laminated glass provides additional protection and noise reduction. Regardless of your choice, ensure it meets or exceeds the relevant safety standards and is installed by professionals.

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FAQs on Understanding the Safety Standards for Shower Glass

1. What types of safety glass are used in shower enclosures?

Safety glass used in shower enclosures includes tempered glass, which breaks into small, blunt pieces, and laminated glass, which holds together when shattered, reducing injury risk.

2. Why are safety standards important for shower glass?

Safety standards ensure shower glass is strong enough to withstand impacts and breaks in a way that minimizes the risk of injury, enhancing consumer safety in bathroom environments.

3. What are the key safety standards for shower glass?

The key safety standards include CPSC 16 CFR Part 1201, which addresses safety for architectural glazing materials, and ANSI Z97.1, which sets performance specifications for safety glazing materials used in buildings.

4. How does tempered glass differ from regular glass?

Tempered glass is heat-treated to be four to five times stronger than regular glass and, when broken, shatters into small, blunt pieces that are less likely to cause injury.

5. What makes laminated glass safe for showers?

Laminated glass consists of layers of glass bonded with an interlayer that holds the glass together if broken, preventing it from shattering into dangerous shards.

Making A Safe Choice With Your Shower Glass

Understanding the safety standards for shower glass is crucial for anyone involved in the design, construction, or renovation of bathrooms. By adhering to these standards, you can create beautiful, modern spaces without compromising on safety. 

Whether you opt for tempered or laminated glass, always prioritize products that are certified to meet safety regulations, and invest in professional installation to ensure your shower enclosure is safe, durable, and compliant with all relevant guidelines.

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About the author

Hi my name is Jeremy Maher. My wife, 2 kids and I went through Contractor Nightmares for 3 years straight.

Ben, Mark, and I teamed up to start Phoenix Home Remodeling to help homeowners remodel without the common contractor nightmares.

Learn more about Jeremy's expertise and topics he likes to write about on his author page.