Waterproofing asphalt sheets
Definition
Concept of waterproofing asphalt sheets
Waterproofing asphalt sheets are products made from modified bitumen, which are mainly used to protect surfaces from the penetration of water and humidity. These sheets consist of a flexible membrane that is applied to roofs, walls and other structures to guarantee watertightness against external agents that may damage the construction.
Its composition and structure allow it to adapt to different shapes and resist adverse weather conditions, ensuring long-lasting protection. They are widely used in the construction and rehabilitation of buildings, constituting one of the most effective and versatile systems for waterproofing.
Composition and technical characteristics
Constituent materials of asphalt sheets
Asphalt sheets are mainly composed of a mixture of bitumen or modified asphalt that acts as a waterproofing matrix. This bitumen can be modified with polymers such as SBS (styrene-butadiene-styrene) or APP (atactic polypropylene), which improve its mechanical and thermal properties.
In addition, these membranes are reinforced with supports such as polyester mesh or glass fibers, which provide tensile strength and flexibility. The upper face can be protected with a mineral layer, polyethylene film or aluminum, to protect the membrane from UV rays, abrasion and facilitate its installation.
The combination of these materials gives rise to products with high durability, resistance to aging and the ability to adapt to structural movements without losing watertightness.
Mechanical and physical properties
Asphalt sheets have excellent tensile strength, allowing them to withstand movement forces and settlements of the structure without breaking. Its flexibility is essential to adapt to irregular surfaces, cracks or joints, ensuring a continuous seal.