Technical analysis
A system-based reading of watertightness, vapour transmission, tensile, tear, ageing and low-temperature results.
Engineering scope
- Principle
- Compare values only when test methods, units, conditioning and specimen directions are the same.
- Verification
- Basis weight and thickness alone do not establish weather, vapour, mechanical or fire performance.
- Field control
- Link the declared value to the tested sample and the batch proposed for the project.
System decision
Start with the actual roof or wall build-up, climate, indoor condition and risk at the relevant interface. Product data must be connected to a defined layer and detail.
Documentation and acceptance
Keep design details, approved product data, delivery labels, batch records, mock-ups, concealed-work photographs and repairs traceable to the installed area.