The roofing screen: preventing difficult climatic conditions
For tiled or slate roofs subjected to strong wind pressures, the under-roof screen is necessary to avoid major damage. Placed between the roof and the attic or panels, the lifting of small roof elements can thus be reduced. The ventilation, the type of installation (continuous or discontinuous), the resistance and the level of sealing, will be determining in your choice.
The synthetic roofing screen: the classic solution
Different types of roofing screens are available on the market: synthetics, bituminous films and reflectors. Synthetic screens can be multilayer, generally made of polypropylene. Lightweight, these microperforated films are easy to apply but not very permeable to water vapor. For better performance, it will rather be necessary to choose HPV synthetics (Highly vapor permeable): more expensive but more resistant.
Bituminous or reflective films: specific characteristics
Other possibilities for your roofing screens, bituminous tiles are characterized by synthetic fibers and a layer of non-woven wallpaper coated with bitumen for good waterproofing. This type of screen is non-slip and has strong mechanical resistance. Finally, the reflective films are insulating and allow a reflection of the heat outside as inside thanks to breathable aluminum faces.