A number of factors have contributed to this Alfresco ceiling suffering major water damage over the years. The most obvious defect to cause the water leaking is the spacing of down pipes around the entire Alfresco. The maximum spacing is 12m, this area has one downpipe per 16.3m.
The next cause is the use of non moisture resistant materials in ceiling linings where there is no weather protection. Although not specified in manufacturers specifications, Best practice is to always use a moisture resistant (aquachek or villaboard) lining when you have less than 200mm from underside of edge beam to underside of exterior ceiling.What’s the most disappointing is this home is an ex display home of one of Perth’s major builders.