Bituminised cardboard felt covered with fine mineral sand
STREŠNA LEPENKA is a bitumen membrane made from cardboard reinforcement, which is completely impregnated and coated on both sides with oxidized bitumen. The membrane has on both sides fine mineral sand. It is used as underlay roofing in systems of paneled pitched-slope roofs, or as temporary protection against moisture. It is laid with a 10 cm overlapping. The product is not weather resistant, so it is necessary to protect it as soon as possible with the primary roofing. The product is in accordance with SIST EN 13959/1 for type W1 and with SIST 1031.
- reinforcement: cardboard
- flexibility at: 4° C
- flow resistance: 70° C
- breaking force longitudinal / transverse: >250 N / >150 N
- elongation at break: >1 %