Description:  

                     weight 500 g/m
thickness 0.65mm
length 25m
width 1m
weight for one role 13kg
physical specification
pull strength +23 degrees
length 9.7kn/m
crossway 7.8kn/m
tear strength
length 170n
crossway 152n
bend when it’s cold
top surface –20 degrees
function:
ventilation
waterproof
sound-insulation
skin resistant potential
uses：wooden islet roof