BRANZ was called into a Dunedin school where too much ventilation caused excessive condensation in a large roof space. Understanding why this happened points to warm roofs being better in some locations.
Twenty years ago, roofs didn’t need to be specifically ventilated. Today, things are different. That’s because 21st century homes are more airtight, and if they aren’t aired, condensation may form.
A numerical simulation tool is used to study the effects of installing additional ventilation channels to the roof cavities of typical New Zealand residential buildings. The simulation software was written...
Corrosion rates in vented cavities: to determine whether installing passive ventilation elements in roof cavities and thence increasing salt particle levels via increased air exchange creates higher corrosion of internal...
