A1 describes the material. Not the entire roof.
A non-combustible material is an important starting point. A roof, however, combines layers, connections and installations.
Insights
Knowledge for better decisions.
Understand what a material can do — and what only a complete assembly can demonstrate.
Above or below the membrane: a fundamental difference.
Two boards may look similar while serving very different roles within a roof.
Moisture-resistant does not mean waterproof.
For mineral boards, the first dry sample is only a starting point. Behaviour throughout service life matters just as much.
A few kilograms per m² quickly become a significant roof load.
Weight affects more than transport. It helps determine whether a solution fits an existing roof.
Coating or board? Start with installation.
A liquid layer and a dry board involve different decisions on site.
What a test report tells you — and what it does not.
A sound assessment starts with the scope of the report, not the logo on its first page.