Ubbink launches Multivap® Altus+, a high-performance underlay screen for roofs up to 1,500 m. Resistant, easy to install and waterproof, it meets the requirements of construction sites in mountain climates.
Under the effect of increasingly extreme climatic conditions and the technical constraints specific to mountain construction sites, Ubbink is expanding its catalog with Multivap® Altus+, an under-roof screen specially designed for roofs located up to 1,500 meters above sea level.
With this innovation, the building envelope specialist offers professionals an alternative that is both efficient and competitive to traditional bituminous screens, guaranteeing optimal additional waterproofing in mountainous regions.
Multivap® Altus+: a tailor-made solution for high-altitude roofs
In mountainous areabeyond 900 meters, the roofs must face particularly demanding climatic conditions :
– significant temperature variations,
– increased snow loads,
– and intense exposure to UV rays.
At altitude, roofs must face snow, wind, temperature variations and intense UV rays. Waterproofing then becomes a crucial issue: robustness, resistance to tears and protection against water and air are essential to guarantee the durability of buildings. © Laure Pophillat
In France, the diversity of altitudes leads to different constraints depending on the sector. More thethe higher the altitude, the more the roofs are subjected to extreme conditions. Conversely, areas located between 900 and 1,500 meters experience a more moderate climate, allowingadapt waterproofing solutions to local specificities.
Multivap® Altus+ implementation diagram. © Ubbink
Multivap® Altus+: the ideal under-roof screen for medium-altitude roofs
Intended for covers in low and medium mountainsMultivap® Altus+ is a R3 screen designed for implementation using the traditional “double ventilated roof” method. This approach makes it reference for construction sites up to 1,500 m altitudewhere this type of installation is most widespread.
The ventilated double roof is a traditional technique which consists of superimposing two layers: first an under-roof screen, waterproof but permeable to vapor, placed on the frame to protect against water and wind while allowing humidity to escape, then the main covering – tiles, slates or shingles – fixed on battens or counter-battens, creating a ventilated space between the two. This air circulation prevents condensation, limits humidity in the frame and guarantees the longevity of the roof, an essential asset in mountainous areas or harsh climates. © Laure Pophillat
Composition of the different layers of Multivap® Altus+. © Ubbink
Multivap® Altus+ is distinguished by its exceptional resistance to nail tearing (400/300 N), a major asset in mountainous areas, limiting the risks of water penetration at the level of the fixingss. Its double adhesive strips also guarantee perfect continuity of the screen, thus ensuring optimal water and air tightness.
