How High Humidity Influences Roof Underlayment Choices
South-East Queensland’s humid summers, intense rainfall and frequent air-conditioning use make moisture management an important part of roof design. Roof underlayment, commonly called sarking , provides a secondary layer beneath tiles or metal roofing. Choosing the right product helps manage wind-driven rain and condensation, but its performance depends on how it works with insulation, ventilation and the rest of the roof assembly. Why Humidity Matters Beneath Your Roo