Will extruded board expand with heat and contract with cold when it meets the weather?

Extruded board will not expand with heat and contract with cold under weather conditions.

Extruded boards produced by normal procedures will not shrink after cooling and curing. Extruded board produced by abnormal process (water or other foaming gas added to save cost) will shrink and deform.

XPS insulation board is an extruded polystyrene insulation board made of polystyrene resin, other raw materials and polymers, which are heated and mixed by special process and injected with catalyst. Extruded board can be used for building ground moisture retention, ground frost heave control and high-speed railway subgrade.