CPF Liners
CPF liners are typically constructed of 100% polypropylene fibres, spun and thermally bonded, with a woven texture of 0.7 mm thickness. Some systems may be laminated to a plastic latticed net to ensure drainage whilst providing stiffness to the liner.
They are robust and chemically inert and may be supplied in rolls of varying length to construction sites.
Read more about this topic: Controlled Permeability Formwork