Final answer:
The selvage edge of IKO's cap membranes is a reinforced edge meant for adhesive application, crucial for creating a watertight seal between overlapping roofing materials.
Step-by-step explanation:
The selvage edge of IKO's cap membranes is a reinforced edge of a roofing material, which is created specifically to provide an area for adhesive application without interfering with the main part of the material when it is laid out during roofing operations. It helps in creating a seal between overlapping rolls of membrane, which is crucial for the assembly's water tightness and overall effectiveness. This edge is designed to be free of granules or other surface treatments to ensure the adhesion between overlapping pieces is secure and durable.