The IKO Challenger 180 Pour & Roll APP Underlay is manufactured with a high-performance polyester base, coated on either side with APP-modified bitumen.
Both the upper and lower surfaces are sanded to facilitate adhesion using hot bitumen or cold bitumen adhesive.
The IKO Challenger 180 Pour & Roll APP Underlay is primarily used as the underlay or intermediate layer within a bituminous built-up roofing system.
This product is also widely used as a nailed preparatory layer.
As an underlay, and when it is installed and conditions are maintained as per IKO literature, the relevant Codes of Practice, and UK Building Regulations, the product will contribute to the durability stated by the respective capsheet.
