As vital parts of the exterior enclosure of buildings, windows must resist weather conditions while helping to maintain a comfortable interior space. They must withstand wind, rain, projectiles and exterior temperature extremes while allowing transmission of light, providing ventilation, accommodating building movements, and forming a relatively lightweight cladding system. Problems associated with any one of these areas can compromise overall building performance. As with most materials, windows deteriorate with age, and some repair and maintenance is necessary. The original performance of these building elements is typically reduced over time, which can adversely affect interior conditions and surrounding building construction.
Don't Blame it on the Rain: 5 Point Action Plan for Building Water Penetration
CBD Rain Penetration and its Control - NRC-IRC
The recent deluge has provided a serious water resistance test for strata and other buildings. Many buildings have failed that test, with serious water penetration issues being identified and water damage being sustained. Some things for property owners to consider:. Is the cause of the water entry located in the lot or the common property? If in the lot it is the owners responsibility. If the cause is through the common property the owners corporation would normally be responsible.
In order for water to penetrate a wall, all three of the following conditions must be true at the same time and location:. Rain, striking a wall at an angle, may have enough horizontal momentum to drive it through an opening see Figure 2a. The water will penetrate the wall if the opening is continuous and properly oriented. The solution in Figure 2b, shows how a labyrinth shaped opening interrupts the flow of water. Other solutions include covering the gap, or orienting the opening downward similar to a louver or baffle 4.
Structural dampness is the presence of unwanted moisture in the structure of a building, either the result of intrusion from outside or condensation from within the structure. A high proportion of damp problems in buildings are caused by ambient climate dependent factors of condensation and rain penetration. Dampness tends to cause secondary damage to a building. The unwanted moisture enables the growth of various fungi in wood, causing rot or mould health issues and may eventually lead to sick building syndrome.