The solid timber-core composite door is a first for Britdoors, which supplies higher end glass reinforced polyester (GRP) entrance doors to the construction and housebuilding industry.

The core is of engineered laminated sustainable hardwood. It bridges the price gap between PVC, steel-faced doors and high-end composites, a spokesman said. The door is made with a 48mm solid timber core and thermoplastic facings to provide high U-values, strength and durability.

A spokesman said: "The Isla range has been developed in response to market demand for top-end style, quality and energy efficiency at more cost-effective prices. Mindful that time is money, the Isla range is available at very short lead times and a 48-hour fast turnaround is available on request."

"This door in particular was designed to provide excellent strength, security and durability due to the timber core. It is a stronger composite door compared with a foam filled alternative and naturally the timber brings thermal efficiencies," a spokesman said.