Roofing Underlayment & Breather Membranes
Roofing Underlayment & Breather Membranes – Protective Layer for Durable Roofs
Our roofing underlayment and breather membranes form the indispensable protective layer between the roofing material and thermal insulation – for a watertight, durable, and healthy roofing system.
They reliably protect the roof construction from moisture, condensation, and wind, while simultaneously allowing for optimal vapor diffusion.
Whether for trapezoidal metal roofs, standing seam systems, or slate roofs – at dachbleche-online.de you will find the right solution for every project: from lightweight diffusion films to heavy-duty underlayment with anti-condensation layers.
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Unterdeckbahn 265 g / m2 für Metalldächer 40 m2 je Rolle
153,95 € inkl. MwSt. zzgl. VersandkostenUnsere Unterdeckbahn für Metalldächer mit integrierter Antikondensschicht schützt zuverlässig vor Feuchtigkeit und Kondenswasser. Dank der hohen Grammatur von 265 g/m² und der reißfesten 3-lagigen Polypropylen-Struktur ist sie besonders robust und langlebig. Der UV-Schutz von bis zu 26 Wochen und die Regensicherheit von 4 Wochen bieten maximale Flexibilität bei der Dachmontage. Ideal für Metalldächer, Faserzementplatten und Schieferdächer.
Unterspannbahn (offene Diffusionsfolie) in verschiedenen Güteklassen 75 m2 je Rolle
ab 105,95 € inkl. MwSt. zzgl. VersandkostenUnterspannbahn 3-lagig – in 135 g/m² und 170 g/m²
75 m2 je Rolle , Paketversand bei Einzelbestellung
Für Abholer aus Bernau haben wir auch 140 g/m2 je Rolle als 4-lagige Variante.
Unterspannbahn (offene Diffusionsfolie) in verschiedenen Güteklassen 80 m2 je Rolle
ab 78,95 € inkl. MwSt. zzgl. VersandkostenUnterspannbahn mit 80 m2 je Rolle
Für Abholer aus Bernau haben wir auch 140 g/m2 je Rolle als 4-lagige Variante.
Versand via GLS oder per Spedition bei Lieferung von Metalldächern
Advantages of Our Underlayment at a Glance
✔ Protects the Roof Structure reliably against wind, dust, and moisture
✔ Vapor Permeable – allows steam to escape outward while preventing water from entering
✔ High Tear Resistance thanks to 3- or 4-layer polypropylene structure
✔ UV and Temperature Resistant for long-term roof safety
✔ Easy & Fast Installation on wooden or metal substructures
✔ Available in various weights (135 – 265 g/m²) for different roof types
Our Product Variants
🔹 Breather Membrane (Diffusion Film)
Lightweight, vapor-permeable membranes with 75 m² or 80 m² per roll, available in 135 g/m², 140 g/m², and 170 g/m².
Ideal for cold roofs, carports, outbuildings, or facade cladding.
→ Also available as a 4-layer variant (140 g/m²) for particularly high tear resistance.
🔹 Premium 265 g/m² Underlayment for Metal Roofs
Our premium underlayment was specifically developed for standing seam and metal roofs.
The integrated anti-condensation layer prevents the formation of condensation under metal surfaces.
- 3-layer polypropylene structure
- Weight: 265 g/m²
- UV protection: up to 26 weeks
- Resistance to driving rain: 4 weeks
- Particularly resistant to mechanical stress
Technical Details
Material: Polypropylene composite, microporous membrane
Application: Underlayment for roofs with trapezoidal sheets, standing seam, tile effect, or slate
Processing: Directly on rafters or sarking board, overlap seams should be taped
Why Underlayment is Essential
High-quality underlayment protects your roof construction long-term against moisture damage, mold growth, and wood decay. It allows escaping water vapor to pass through while preventing the entry of rain, snow, or dust. This keeps the thermal insulation dry and your roof durable.
Especially for metal roofs, using a membrane with an anti-condensation layer is crucial to manage moisture and maximize the lifespan of the roof.
Summary: The Foundation for a Long-Lasting Roof
Our underlayment and breather membranes are the solid foundation for every professional roof construction. They protect, ventilate, and stabilize – ensuring a permanently secure roof structure.
➡️ Select the right underlayment for your project now – available in various weights and roll lengths.