When building safety is a priority, materials need to do more than look good—they need to perform. Seves Fire Rated Glass Block Windows offer proven fire protection with natural light and design flexibility. Designed specifically for window openings, they are ideal for both commercial and residential applications where daylighting and code compliance are essential.
What Does “Fire Rated” Mean?
Testers check how well a fire-rated material resists fire for a set time, often 60 or 90 minutes. It helps slow flames, smoke, and heat.
In glass block window systems, this means:
- Maintaining strength and stability during a fire
- Acting as a barrier to flames and hot gases
- Helping protect adjacent spaces and occupants
Building codes often require these systems in fire-rated window openings, stairwells, corridors, and shared walls where fire containment is critical.
Fire Rated Glass Block Window Sizes & Systems
Seves offers fire rated glass block windows in multiple configurations to meet both code requirements and design needs:
- 8″ x 8″ x 4″ sizes available in both:
- THICKSET® 60 (60-minute rating)
- THICKSET® 90 (90-minute rating)
- 6″ x 6″ x 4″ size available in:
- THICKSET® 90 in the Clarity pattern
These options allow flexibility in layout, whether you’re designing larger fire-rated window openings or more compact applications.
Balancing Light & Privacy
One of the biggest advantages of fire rated glass block windows is the ability to choose how much light and privacy you want.
Depending on the pattern, you can select:
- Smooth, undistorted faces for maximum light and visibility
- Textured designs for increased privacy and light diffusion
This makes it easy to tailor your fire-rated window installation to the specific needs of your space.
Fire Rated Glass Block Window Patterns from Seves
Seves offers four patterns in its Fire Rated Glass Block Window line. Each pattern is designed for window applications while maintaining required fire performance.
Clarity
Clarity features a smooth, undistorted face that allows the highest level of light transmission. It’s the go-to option when brightness and a clean, modern look are the priority.
Ideal for:
Office windows, interior borrowed-light openings, and areas where visibility matters.
Nubio
Nubio offers a soft, wavy texture that gently distorts visibility while still allowing light to pass through. It’s a classic choice for privacy-focused window designs.
Ideal for:
Corridor windows, stairwell openings, and residential privacy applications.
Spray
Spray glass block provides a fine, lightly textured surface that balances light diffusion with a moderate level of privacy, and is available exclusively with a 60-minute fire rating.
Ideal for:
Transitional spaces and mixed-use window applications.
Endura
Endura glass block is built for durability and performance, offering a more structured look while maintaining fire-rated protection, and is available exclusively with a 90-minute fire rating.
Ideal for:
Industrial facilities and high-traffic commercial window openings.
Where Fire Rated Glass Block Windows Work Best
Fire rated glass block windows are commonly used in:
- Commercial buildings – offices, retail, warehouses
- Multi-family housing – shared walls, hallways, stair towers
- Institutional projects – schools, healthcare facilities
- Residential spaces – garages, basements, and property line window openings
In each application, they help meet safety requirements while allowing natural light into the space.
Safety Without Sacrificing Design
With THICKSET® 60 and THICKSET® 90 systems, Seves Fire Rated Glass Block Windows support modern building design while serving as code-compliant fire-rated window solutions. They offer multiple size options and patterns like Clarity, Nubio, Spray, and Endura.
They’re more than a safety feature—they bring light, privacy, and fire protection together in one specialized window system.
