Bitumen Roofing. Bitumen has been used roofing for many years. Bitumen-impregnated cardboard is the most popular due to its relatively low cost and versatility: this material can be used not only for roofing, but also for waterproofing.
Rolled bituminous materials absorb water quite well and cannot guarantee completely watertight seals. So roofs are made of 3-4 layers of bituminous material.
If the seals are not watertight, water accumulates in the spaces between layers. At subzero temperatures, water expands the already existing microcracks, breaking the roof cover.
The expected time between roof construction and its first repairs is 2-3 years. Repairing the damage is also complicated. This is due to the fact the the location of the water between the layers very seldom coincides with the location of the leak. Every time the number of layers increases, but they gradually break in the cycle of freezing and melting of ice. With time, the costs of repairs exceed the costs of construction and continue growing.
To improve cold resistance and elasticity of a soft roof, special SBS modified bitumen is used. This material is bitumen with a special artificial rubber additive.
A soft roof made with SBS-modified bitumen is stable to high temperatures and UV, and also retains its elasticity at subzero temperature.
GlobeCore has developed and manufactures the UVB-2 type units for bitumen modification. Bitumen produced by this machine fully meets the requirements to roofing and waterproofing operations. UVB-2 units can be used either outdoors under a canopy or indoors in well-ventilated structures.