What is the rainscreen principle?
Water droplets are not driven through the panel joints or openings because the rainscreen principle means that wind pressure acting on the outer face of the panel is equalized in the cavity. Therefore, there is no significant pressure differential to drive the rain through joints.
What is a rain screen cladding system?
Rainscreen cladding is a kind of double-wall construction that utilizes a surface to help keep the rain out, as well as an inner layer to offer thermal insulation, prevent excessive air leakage and carry wind loading. The surface breathes just like a skin as the inner layer reduces energy losses.
What is a rainscreen design?
What is a Rainscreen? Rainscreens are time tested wall systems that have been in use for over a century. The rainscreen design is generally defined by the separation of cladding from a structural wall in an effort to man- age moisture and energy transfer through a wall assembly.
What is rainscreen made of?
The Rainscreen Drainage Gap Sure Cavity and Gravity Cavity are made of a rigid corrugated plastic with a mortar blocking fabric that covers the exterior wall surface and provides a predictable drainage gap and an unobstructed path for moisture to exit the wall system.
How is rainscreen cladding installed?
A rainscreen cladding system is installed externally, directly on the existing structure of a building. This creates a ventilated cavity between the structural frame of the building and the facade itself.
What is rainscreen siding and what are its potential benefits?
Building Science Corporation notes “rainscreen gaps help walls manage moisture. A rainscreen gap helps to dry the sheathing, which may accumulate moisture during cold weather. It also helps to dry the siding when it is soaked by rain…. The gap provides a capillary break between the back of the siding and the WRB.
What is the difference between rainscreen cladding and cladding?
Some water may penetrate into the cavity but the rainscreen is intended to provide protection from direct rain’. So, the key distinction is that curtain walling is usually the whole envelope, while rainscreen cladding is the outer protective layer of the envelope.
What is a rainscreen facade?
A rainscreen (sometimes referred to as a ‘drained and ventilated’ or ‘pressure-equalised’ façade) is part of a double-wall construction that can be used to form the exterior walls of buildings. Rainscreen cladding systems were first investigated in the 1940s.
What is rainscreen siding?
A rainscreen is an exterior skin system made up of siding, an air gap via furring strips, WRB layer, and structural sheathing substrate (nowadays OSB or plywood). The siding sheds 90% or more of precipitation, but not all of it.
Why do I need a rainscreen?
A rainscreen helps to keep the sheathing and the back of exterior siding dry when they get soaked with rain. The rain screen gap also allows moisture to evaporate.
When was rainscreen cladding invented?
1940
The modern concept of rainscreen cladding was developed in Scandinavia during the 1940′s and it soon became widely used throughout Europe.
How do you make a rainscreen?
To build a rainscreen wall, simply add space between your siding and your weather-proof barrier covered sheathing. The secret to a rainscreen wall system is the airspace separation between siding and sheathing. Traditional wall construction consists of an exterior siding (primary barrier) installed over sheathing.