Roofing tissue is one of the principal raw materials used in waterproofing membranes, where it serves as the carrier and reinforcement. Its key properties include corrosion resistance and bitumen absorption. Longitudinal glass-fiber yarns are incorporated into the tissue to increase longitudinal tensile strength and tear resistance. Waterproofing membranes manufactured with this fiberglass tissue do not readily crack, degrade, or rot. Other important properties include uniform mass distribution across the surface and resistance to ultraviolet radiation from sunlight.

Roofing tissue is available in basis weights from 50 to 100 g/m².

Applications:

• Raw material for bituminous waterproofing membranes: Used as the carrier and base layer onto which molten bitumen is applied to form membrane sheets.
• Reinforcement of waterproofing membranes: Increases the tensile and structural strength of membranes against tearing, stretching, and building settlement.
• Dimensional stability of insulation: Prevents deformation, shrinkage, or elongation of bituminous waterproofing layers and membranes under temperature fluctuations, including extreme cold and heat.
• Direct waterproofing of roofs and foundations: Used layer by layer in traditional bituminous waterproofing to integrate the bitumen layers.