Rainscreen Principle

What is Rainscreen?

The Rainscreen Principle is a method for controlling rain penetration through a wall cladding system. Panels are attached to a fastening system that allows for expansion and contraction. This ensures equalization of air pressure that enables moisture to escape, improving the overall energy efficiency of the building.

Advantages of utilizing the rain screen (rear ventilated) system of installation

Deflection of rain water and moisture penetration

The design principle  deflects almost all rain water. Any minimal penetration through joints  and residual humidity is eliminated by the air circulation and open  cavity. Because the continuous air circulation quickly evaporates any  water in the cavity space, mold and mildew cannot occur.

Enhanced thermal insulation

Ventilated façades allow for structural  separation of the different functional layers (cladding, thermal  insulation, and support structure). The ventilated cavity prevents heat  accumulation during the summer. The outer cladding, (if the façade  chosen reflects solar radiation), combined with the constant air  circulation reduces the amount of heat that is absorbed by the building. During cold weather the ventilated cavity allows for enhancement of the insulation. The ventilated layer has a storage effect that diminishes  temperature changes, thereby maintaining a more constant indoor  temperature.

Sound proofing

Because of the structure of separated layers, the  ventilated façade absorbs noise. Depending upon the type of materials  used for the structural support wall and the exterior façade, the  soundproofing can be improved by at least 10 dB.

Protection of the support walls

The façade and ventilation system  “shields” the support wall, thus improving the life span of the  structural support wall.

Less maintenance required

The system is an open joint system, therefore caulking/sealing of joints will not have to be maintainedProblems with cracking, spalling, water penetration/damage are eliminated