Door AND frame injected with polyuerethane insulation.
Part L compliant –U value 1.8W/m2K
Insulation is an important aspect that is often overlooked by other suppliers, in that they use cheap material to insulate their security doors. Mineral wool and honeycomb paper insulation, when used in a steel security door, do not meet the requirements for U values for Building Regulations. Our U-value has been confirmed by an accredited laboratory, using the correct method of calculating the door and frame as a complete unit. By using polyurethane insulation, our security doors are not only structurally reinforced but also meet thermal performance requirements.