Vapor retarders and vapor barriers (VCL) for pitched roof systems
A four-person household produces around 10 liters of water vapor per day. In highly thermal insulated low-energy and passive houses, this moisture can no longer escape. The air quality decreases, and the water vapor can settle as condensation in the layers of the building envelope. To ensure that the structure is not damaged, the water vapor permeability of the airtight layer must be calculated precisely, and the outer shell must also be taken into account.
Vapor barriers installed over the entire interior surface on the warm side of the thermal insulation layer provide a remedy. According to EnEv, they must be airtight but permeable to water vapor on both sides. Special material properties allow water vapor to diffuse from the warm side to the cold side and from the higher to the lower pressure.
Vapor barriers with an sd value of up to 1500 m are standard today. Absolutely diffusion-tight vapor barriers with an sd value of more than 1500 m are generally only used for special applications, as the barrier layer prevents regular moisture equalization, which can lead to damage to the building fabric in the long term in standard applications.
Possible applications of CaPlast vapor retarders and vapor barriers
- Vapor barrier for interior finishing
- Vapor barrier for roof insulation
- Temporary temporary covering
- Diffusion-open wall and roof constructions
- Wooden frame construction
- Ventilated and unventilated systems
- Suitable for blow-in insulation material
Configure your vapor retarders individually
At CaPlast, you can tailor functional properties such as sd value, tear resistance, tensile strength, elongation, color, and structures precisely to the desired application and target functionality of the vapor barrier or vapor retarder. Talk to us about your requirements in terms of sustainability, energy efficiency, thermal insulation, transparency, handling, printing, and quality.
Important properties for vapor barriers and vapor barriers that we always keep in mind
- Highly resilient
- Highly tear-resistant, nail-resistant, perforation-proof
- Stability and translucency (rafter visible)
- Alkali resistant
- High surface tension for secure airtight bonding
- Recyclable and environmentally friendly
- No VOCs for a healthy, harmless indoor climate
- Increased thermal insulation/radiation barrier
- Heat reflective
- Air tightness in detail and across the entire surface
Matching system accessories
The right system accessories are crucial for all vapor barriers and vapor barriers. We offer you the right system accessories, such as prefabricated corners, permanently elastic adhesives and sealants, adhesive tapes for indoor and outdoor bonding, for bonding vapor barriers, for repairs, or for airtight, windproof, and waterproof connections of overlaps and penetrations. If these are already available, we will work with you to check their compatibility and performance on our membranes.
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.