Polyfoam Roofboard Extra is a rigid
but lightweight extruded polystyrene
(XPS) board with high compressive
strength and is used in conjunction
with Polyfoam Slimline Zero
Membrane as a Polyfoam Inverted
Roof System.
Polyfoam Roofboard Extra is used
for the thermal insulation of a wide
variety of flat
roofs including:
• in an inverted roof below ballast or
paving slabs
• in a green/garden roof
