Solflex heat-reflective roof films (Summer / Winter / ‘Breathable’)
Solflex roofing membranes are heat-reflective membranes for roof structures, designed for a variety of applications. The product range includes both vapour-permeable (‘Breathable’) and vapour-sealing (‘Summer’, ‘Winter’) solutions, allowing you to select the appropriate type for your planned layer configuration.
‘Breathable’ membrane
The Solflex ‘Breathable’ membrane is a vapour-permeable, heat-reflective underlay for roofing systems. Based on the manufacturer’s specifications, the product has been developed to offer improved waterproofing, vapour permeability and easier installation, and its heat-reflective properties are also highlighted.
Nyár foil
Solflex Summer Foil is an internal vapour barrier and heat-reflective underlay for roofing. The data in the declaration of performance indicate strong vapour barrier properties (high Sd value) and watertightness.
Winter foil
Solflex Winter foil is an internal vapour barrier and heat-reflective foil for roofing applications. The performance declaration specifies a very high Sd value, indicating strong vapour-barrier properties.
Technical specifications
Intended use (manufacturer’s description)
- Breathable: vapour-permeable, heat-reflective underlay
- Summer: internal vapour barrier, heat-reflective underlay
- Winter: internal vapour barrier, heat-reflective film
Typical parameters (examples from the declarations)
- Breathable: water resistance W3; Sd 0.689 m; weight 195 g/m²
- Summer: water resistance W1; Sd 239 m; weight 125 g/m²; fire rating: E
- Winter: water resistance W1; Sd 355 m; mass 62 g/m²; fire rating: E
Standard / class
- water resistance class (W)
- Sd value (diffusion)
- tensile strength / elongation / ultimate tensile force
- fire resistance class (by end use)



