SUNFLEX Contact PRO membrane

SUNFLEX Contact PRO super diffusion barrier waterproofing membrane with an outer reflective layer made of polished aluminium combines the excellent heat reflecting ability of SUNFLEX products with a high degree of vapour permeability. The reflective plated layer effectively protects against radiant heat in summer. Thanks to its high permeability, the special triple-layer technology allows perfect evaporation of water vapour from the roof structure while at the same time perfectly preventing rainwater from entering the structure.

SUNFLEX® Contact PRO advantages

• Reflects up to 95–98 % of thermal radiation
• High strength, load-bearing capacity and puncture resistance
• High permeability to water vapour, coefficient sd = 0.045
• High-quality insurance waterproofing
• UV resistance 3 months
• Layer composition: three-layer PPL textile/high gloss AL film with microperforation/double application strip

Installation

The film is stretched over the trusses with the reflective side towards the roofing.

The installation can be carried out directly on the thermal insulation or formwork. It is fixed to the roof trusses using the counterlaths. The overlap of the strips should be 10–15 cm, and the individual strips should be joined together using the integrated application strip. This ensures the integrity of the system and increases its functionality. For roof trusses with a slope of less than 20°, the glued film joints must be terminated at the drip edge.

SUNFLEX Roof-In Plus film

The reflective vapour barrier SUNFLEX®Roof-In Plus film combines the properties of vapour barrier film, thermal insulation, and reflective effects.

The SUNFLEX® Roof-In Plus film is produced by laminating a reflective metallic layer onto bubble wrap. The metallic layer reflects up to 95 % of thermal radiation back into the room. The reflective layer, together with the bubble wrap air cushions and the air gap between the film and the internal cladding, acts as additional insulation, representing up to 5 cm of mineral wool (the layer thermal resistance with a 3 cm air gap is 1.1 m2 k/W). The application of the film removes thermal bridges in the rafter areas.

It is excellent for low-energy houses and wooden buildings.

SUNFLEX® Roof-In Plus advantages

• 100 % vapour barrier
• 92 % reflection of thermal radiation
• Saves 10 % of heat energy
• Protects against electromagnetic radiation
• Great strength in both directions
• Resistant to solar UV radiation and chemical substances
• Layer composition: polyester, aluminium, polyethylene, bubble wrap (polyethylene)
• Protective metallic layer against air penetration + quality bubble wrap = long lifetime

Installation

The film is stretched under the rafters with the reflective side facing the room.

The strip overlap is approx. 5 cm. The joints are sealed thoroughly with tape to prevent water vapour from penetrating the insulation.

It is necessary to seal the film to the wall, window or chimney with butyl tape or permanent elastic sealant. Plasterboard or other cladding (using wooden beams or metal profiles) is mounted on the film. To maximise the film's reflective properties, it is essential to maintain an air gap between the film and the cladding.