The classification used in the Technical Code is defined by the following parameters:
Contributing to the spread of fire.
A1: non-combustible; does not contribute to the maximum extent to the spread of fire.
A2: Non-combustible; does not promote fire propagation to a minor extent.
B: Combustible with very limited contribution to fire spread.
C: combustible but not very conducive to fire spread.
D: combustible, contributing to the spread of fire on average.
E: combustible material which contributes significantly to the spread of fire.
F: not classified.
Opacity of the smoke emitted.
s1: low opacity.
s2 : Average opacity.
s3 : Kõrge läbipaistmatus.
Falling burning droplets or particles.
d0: Not produced.
d1: produces on average.
d2: Produces on a large scale.
Sõltuvalt nende rakendusest.
Without index for roof and wall materials.
FL index for flooring materials.