Underlays and sarking membranes for pitched roof systems
Say goodbye to sloping roofs. The trend in modern architecture is increasingly moving towards flat roofs. This poses a major challenge in terms of rain protection for roof cladding. Unlike traditional pitched roofs, rain cannot run off due to the lack of roof pitch. An architectural compromise that is becoming increasingly popular is the flat-pitched roof.
In Germany, for example, the standard roof pitch for various tile shapes is specified and ranges from 9° (with approval) to 40°. If this is not met, a sub-roof is mandatory. CaPlast offers particularly durable, multi-layer membrane systems with TPU-coated fleeces for this application. They are completely waterproof, extremely flexible, and easy to weld. National regulations, such as those in Austria, France, and Switzerland, as well as national "seals of approval," give rise to a multitude of requirements, which we keep in mind and for which we can offer appropriately tested solutions.
Since all roofs are now usually insulated and attics are used as living space, the underlay membrane is the most common roofing membrane for pitched roofs with standard roof pitches. It lies directly on the insulation or on formwork, so it must be diffusion-open on the cold side to allow moisture that penetrates the roof structure from the building to be transported to the outside.
Our solutions in the field of roof underlay membranes can generally also be used as roof underlay membranes. Roof underlay membranes form the second water-bearing layer below the roof covering in unfinished and uninsulated attics and are stretched between the rafters with a slight sag.
Possible applications of the waterproof CaPlast roofing membranes
- Underlay membrane (UDB) and breathable underlay membrane (USB)
- Temporary roofing/rainproof sub-roofing
- Shuttering membrane
- Ventilated and non-ventilated constructions
- Renovation and new construction
- Under-covering under PV systems or solar thermal systems
- Rainproof and watertight sub-roofing
Configure your roofing membranes individually
At CaPlast, you can tailor functional properties such as sd value, tear resistance, tensile strength, elongation, color, weather resistance, and regional or individual additional properties precisely to the desired application and target functionality of roof underlays, roof underlays, and roof underlays. Talk to us about your requirements in terms of sustainability, energy efficiency, thermal insulation, handling, printing, and quality.
Important properties for sarking membranes, underlays and subroofs
- Temperature and aging resistance
- Long weathering times with minimal loss of aging resistance
- Resistance to driving rain
- Highly abrasion-resistant and scratch-resistant
- Highly diffusion-open
- Fire properties up to flame retardancy
- Easy to install
- Oil and surfactant resistant
- Seam sealing up to welding
Suitable system accessories
The right system accessories are crucial for all underlay membranes and roof underlays. We offer you the right system accessories, such as adhesive tapes for the overlap area of underlay membranes and roof underlays, UV-stabilized adhesive tapes, nail sealing tapes for temporary coverings, liquid plastics, adhesives and sealants, transparent and permanently UV-stable adhesive tapes, welding strips and swelling welding agents, weldable corners and waterproof connections for pipe penetrations.
CaPlast offers these various roof products
Vapor Retarders and Vapor Barriers
Individually developed functional films such as vapor barriers, vapor barriers, underlay membranes, roof underlay membranes, and system accessories.
Roofing underlays for pitched roofs
Customized, diffusion-open roof underlays and system accessories such as corners for pitched roofs.
Vapor Barriers for the Flat Roof
We tailor the sd value, tear and tensile strength, fire properties, and weathering resistance to your application.
CaPlast offers these various construction products
Roof products
Individually developed functional films such as vapor retarders, vapor barriers, sarking membranes, underlayments as well as system accessories.
Waterproofing Products
Development of decoupling and sealing membranes as moisture barriers, vapor barrier on floor slabs or or sealing layers in outdoor areas. Last but not least, solutions for concrete protection.
Facade products
Whether closed or rear-ventilated, partially open facade constructions: CaPlast has many years of experience in the field of diffusion-open facade membranes for various applications.
Landscaping & Greenhouses
From light-tight partition wall systems to joint tapes and root protection, CaPlast is the right place for you.
Sewer pipe rehabilitation (CIPP)
The CaPlast Group has many years of expertise in the manufacture of semi-finished products for trenchless sewer rehabilitation.