Process energy / dust
Mills, fibres, isocyanates, metal fume or silica — name the actual agent.
Darker cells mean a higher score for this topic on that metric.
Strength50
Heat resistance58
Fire performance88
Insulation28
Workability55
Circularity70
LessMore
Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Is Glass non-combustible?
Declared reaction class in this atlas: A1. Assemblies still need resistance tests.
Does Glass insulate?
Thermal mark 28/100 versus the atlas. Conductivity note: ~1 W/m·K.
What is the density band?
~2.5 g/cm³
How is it made?
Origin story: Mesopotamia / Egypt; float 1959 (Near East → St Helens).
Can it be recycled?
Circularity mark 70/100 — editorial, route-specific.
Typical melting or failure heat?
softens ~500–700 °C
heat 58 · fire 88
Safety here is encyclopedia, not a workplace assessment. Name the agent: dust, isocyanate, fibre, fume, moisture, fire.
Fire class A1 is reaction language unless an assembly test is cited.
Hazards
In service
Corrosion, moisture, UV or creep silently retire sections.
Fire products
Smoke, drip, fibres or toxicants depend on chemistry.
Cut / puncture
Handling injuries are more common than brochure failures.
Mis-specification
The wrong grade is the most expensive hazard.
Fire class
Reaction
A1
Resistance
Assemblies (EI, R, Type X) are not implied by the material letter.
Test families
EN 13501, ASTM E84, ISO 5660, KS F 2271 — they do not equal each other.
People vs structure
Clothing FR and steel R-ratings are different professions.
Environment
Carbon / energy
Better-than-average loop for this atlas, still not zero.
Toxics / fibres
Additives, dusts and processing aids (not always the polymer backbone) drive regulation.
Water
Process water, leachate or moisture swelling.
End of life
Sortability beats theoretical recyclability.
Handling
Store dry and labelled
Grade mix-ups scrap lots.
PPE for the actual agent
Fibres, isocyanates, UV, sharp edges — not a generic “chemicals” pictogram.
Do not improvise fire class
Coatings and cavities change the letter.
Follow the WPS / DFT / compression
Installation is in the specification.
Codes move. Recheck KS, JIS, EN, NFPA and IBC editions for the job’s jurisdiction.
Keep exploring
More in Ceramics & wood
💎
Technical ceramics
Crystalline oxides and carbides for heat, wear and electronics — not the mug on the desk.
Overall 64 🏗️Concrete
The hydraulic ceramic of cities — cement, water, rock and usually steel, with a fire story better than exposed steel.
Overall 57 🌲Wood
Anisotropic cellulose composite grown as trees — carpentry, mass timber and a combustible story that codes still manage.
Overall 57 🎋Bamboo
A fast grass culm sold as timber — scaffolding, flooring and a glue story that decides the indoor air.
Overall 55