Expandable polystyrene is a light, strong, durable material, which is used in many other products, such as walls, helmets, coolers, etc.

Crest takes the EPS beads in their raw form and puts them into a pre-expansion chamber where they are heated and expanded into a solid block form.

This block is sliced into the appropriate size and then each slice is stamped with the appropriate design of the door it will be used in.

This method creates a perfect mold of the inside of the door. With no gaps, voids, or bubbles the door is completely insulated providing the customer with the most efficient door on the market.