The ventilated Rainscreen Cladding system is effective in dealing with moisture management and temperature regulation. An architectural design with the use of fiber cement panels in a rainscreen application is the perfect solution for designers looking to achieve an energy efficient building utilizing exterior insulation to prevent thermal bridging and reduce condensation.
Preventing thermal bridges
As the insulating material is on the outside of the structural wall, it can easily be mounted without interruptions caused by fl oor slabs. In this way, any thermal bridges that occur at each floor slab can be prevented. These thermal bridges are also the cause of surface condensation that may result in fungus growth.
Dissipating heat from the sun
The ventilated rainscreen cladding system has a cooling effect when temps outside are high. Most of the sun’s rays are reflected away from a building. Heat passing through the exterior wall panel is partially dissipated by the ventilating effect of the space between the exterior cladding panel and the structural wall. Any residual heat managing to penetrate buildings is minor.
Architectural wall-cladding panels act as a rainscreen on the outside of the building and keep the structural wall absolutely dry. The air space connected to the outside air evacuates water and humidity that might have penetrated behind the wall-cladding panels through its horizontal or vertical joints. This water will never reach the load bearing wall and/or the thermal insulation.
Protecting the basic structure and load-bearing wall against temperature variations
In view of the fact that the insulation material is applied to the outside of the building, changes in temperature are very minor compared with those found in conventional constructions where insulation is applied on the interior. This principle works in summer and winter in both hot and cold climates.
Prevention of internal condensation
Insulation material can be applied to the outside of the structural wall because it is protected effectively by the architectural exterior wall panel. Because of differences in vapor pressure and temperature passing through the wall, condensation has been shown to occur close to the ventilated area and not in the structural wall itself. As a result, the ventilating effect is easily sufficient to dry out the thermal insulating material.