SBS (Styrene-Butadiene Styrene) makes bitumen elastomeric so that it can
withstand cyclic movement and cracks in the substrate up to 1mm. West Indian
bitumen gives virtually unlimited life and exceptional adhesion.
Fully bonded to ensure no possibility of water tracking behind the membrane, and for greater resistance to damage.
Protection desirable and PB4 insulates (R-value 0.3 and IIC sound rating 53)
and acts as expansion/contraction joint.
Use Wrimco Drainage Cell with Filter Fabric if required to relieve hydrostatic
pressure on wall in lieu of "PB4".
Use "Wrimco SBS Granual" where membrane is exposed to sunlight.
Fully bonded, torching as the roll is unwound upwards as shown.
Non-Woven Polyester (NWP) reinforcement gives over 40% elongation and
excellent puncture and tear resistance.