Covertek 407 Absorbent Breathable Synthetic Non-Woven Roof Underlay can be used as a roof underlay on buildings within the following scope:

• Class 1 and Class 10 buildings; and
• Class 2 to Class 9 buildings subject to specific weather-tightness designs; and
• Constructed with timber and steel framing in accordance with the BCA; and
• With masonry tile, metal tile or profiled metal roof cladding ; and
• Situated in non-cyclonic Wind Zones up to and including N3.