Gypsum board in 1990s: EN 520
Read the condition on Gypsum board before the nickname. Year 1990s, line “EN 520,” figure 520. Glass fibres in core for fire assemblies. A material is what it is made of, the condition it survives, and where it goes afterward. Gypsum board under “EN 520” in 1990s should say which, with 520 tied to the condition. A figure with no condition is a boast. Readers meet the name on the back of a product, so the code and the history should not share one sentence.
This atlas treats Gypsum board as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: ~0.17 W/m·K. Insulation score 34/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: A2-s1,d0 typical; core A1. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.
Origin: Sackett 1894; US Gypsum 1916, United States. The process chapter follows feedstock → conversion → forming → finish → install. Uses span buildings to defence / safety. Pairings matter: mineral-wool. Circularity mark 62/100. Ask which scrap, which certificate, which year. Related atlas entries, a short glossary, and three threads that keep Gypsum board honest.
Timber frames that need this lining. EN 13501-1 reaction-to-fire letter (A1–F), not a wall rating. Thermal conductivity in W/m·K. Lower means better bulk insulation. Declared performance after blowing-agent or moisture drift. The zone where heat or chemistry changes the datasheet.
The label keeps Gypsum board, 1990s, and 520. “EN 520” is the condition on the figure.1990s
Figures to keep
- Year of the condition
- 1990s
- Property figure
- 520
- Material
- Gypsum board
- Use line
- EN 520
Intumescent coating in 2010s: ETICS / foam compatibilityNext essayAll 1000 essays1000