Scope of use

Covertek 407 can be used as a roof sarking on both residential and commercial buildings within the following scope.

• Class 1 and Class 10 buildings; and,
• Class 2 to Class 9 buildings subjected to specific weathertightness design; and,
• Constructed with timber and steel framing in accordance with BCA; and,
• With masonry tile, metal tile and profiled metal roof cladding; and,
• Situated in non-cyclonic wind zones up to, and including N3.
• Building designers are responsible for the building design and for the incorporation of Thermakraft Covertek 407 roof sarking into their design in accordance with the declared properties and the instruction of Kingspan Insulation.
• Self-supporting - Refer to installation guide regarding underlay support requirements.
• Not suitable for roof pitch less than 3 degrees.
• Will provide temporary weather protection during construction (maximum 28 days), same day coverage recommended.

General

• Low Flammability Index when tested to AS 1530.2:1993. 
• Unaffected by LOSP or other solvent based treated timber. However, LOSP or other solvent based treated timber must have sufficient time for the solvent chemical to flash off in a well-ventilated area. Recommended minimum 7 days.
• Tear resistant and strong.

Control of Condensation

In climatic regions where condensation risks are high, such as cold or high humidity areas, care needs to be taken in specifying the correct design and installation to prevent moisture build-up in the roof cavities.

Factors which adversely affect the condensation risk in roofing systems include;

• Humid, and/or cold climatic regions.
• Warm/Skillion roof construction.
• Low roof cavity air volume and restricted air movement.
• Omitting Vapour Control Layers.
• Occupancy activities which have high moisture loading on conditioned spaces.
• Ceiling penetrations and entry of warm air into roof cavities.
• Low pitched roof.
• Bulk insulation.
• Building structures ability to naturally dry construction moisture.

Skillion and Warm Roof Construction are particularly sensitive to moisture accumulation and the design and installation of roof construction needs to take into account the higher condensation risks.

Durability

Covertek 407 is expected to have a serviceable life equal to that of the roof cladding provided:

• It is not damaged.
• Installed in accordance with installation guide.
• Is not left exposed to the weather or UV for more than 28 days.
• Is compatible with cladding system used.*

Product Warranty

Standard Kingspan Insulation warranty applies. Call 1300 247 235 for further details on Kingspan Insulation Warranty Statement.