Flexible shingles are a roofing material made from fiberglass impregnated with modified bitumen and protected with a stone chip coating on the outside. They are supplied in shingle form (sheets with patterned cutouts), allowing for a neat roofing pattern and the ability to cover complex roof areas.
The material https://stroy-snab-group.kz/ is valued for its light weight, good sealing, low noise levels during rain, and a wide range of colors. When installed correctly, flexible shingles provide long-lasting protection for roof slopes, and the quality of the result depends largely on the preparation of the substrate and adherence to the installation technology.
What are flexible shingles and what are they made of?
The shingle core is a durable fiberglass mat, which ensures dimensional stability. It is coated on both sides with a bituminous binder (often modified SBS or APP), which increases elasticity and resistance to temperature fluctuations. The outer layer is a mineral (basalt/shale) dressing that protects the bitumen from ultraviolet radiation and mechanical stress, while the bottom layer is a self-adhesive layer that ensures the shingles adhere when heated by the sun and are secured with fasteners.
Advantages and Limitations of the Material
- Tightness due to multi-layer construction, overlaps, and an adhesive layer.
- Versatility: Suitable for roofs with complex shapes, domes, valleys, and abutments.
- Quiet roofing: Reduces rain and hail noise compared to sheet roofing.
- Limitation: Requires a solid base and proper ventilation of the under-roof space.
Composition and Structure of Bituminous Shingles: Layers, Dressing, Adhesive Belt
Bituminous (Flexible) Shingles – a multi-layer roofing material in which each layer contributes to the strength, tightness, and durability of the coating. Understanding the structure helps select the correct shingle type and adhere to installation guidelines to avoid errors that could impact the roof’s service life.
Structurally, shingles consist of a reinforced base impregnated with modified bitumen, protected by a mineral dressing on top and an adhesive layer underneath. Improper storage, installation, and fastening procedures primarily affect the performance of the dressing and adhesive layer.
Key Elements of Flexible Shingles
- The base (reinforcement) is most often fiberglass, which ensures dimensional stability and tear resistance. The quality of the base determines how well the shingles retain their shape and withstand wind loads.
- Bitumen binder – a layer(s) of bitumen, often modified (e.g., SBS/APP), responsible for water resistance, elasticity, and resistance to temperature fluctuations.
- Top mineral dressing – basalt or shale granulation, which protects the bitumen from UV radiation and mechanical stress, and also forms the color and texture. Uniformity of the coating is important for a consistent appearance and protection of the bitumen layer.
- The sub-coating/protective coating underneath is a finely dispersed material that prevents shingles from sticking together in a stack and simplifies installation.
- The adhesive belt (self-adhesive strip) is a heat-activated bitumen-adhesive section that, when heated by the sun, ensures the bonding of rows and increases wind resistance. For the adhesive belt to work properly, a clean surface, proper overlap, and adherence to installation temperature conditions are critical.
Summary: The reliability of flexible shingles is determined by the combined action of the reinforcing base, bitumen layer, protective coating, and adhesive belt. Installation procedures (correct overlaps, fixation, clean base, and adherence to temperature restrictions) directly ensure tightness, wind resistance, and the preservation of the roofing appearance for the entire estimated service life.
