Many local authority building regulations require fire doors to be fitted where there are three floors or more. For example, a basement, ground floor and first floor. Fire doors should be fitted to protect areas where the fire could easily spread such as hallways or kitchens.
A solid timber door cannot withstand a fire long enough, and in brief and would serve to feed the fire being made of wood. However, a veneered door with a specialist type of chipboard is treated with flame retardant chemical.
This will then provide a fire rating of over 30 or 60 minutes dependant on the thickness. For example, an FD30 rated door of 45mm thickness would provide protection from fire for a minimum of 30 minutes. An FD60 rated door of 55mm thick would offer protection in excess of 60 minutes.
The blog below highlights the materials we use in our fire doors.
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