Generally, the minimum hearth size for a wood burning stove is 150mm on either side of the stove and at least 840mm by 840mm for freestanding stoves. Your hearth will also need to be deep enough to prevent accidents. The minimum hearth depth for a wood burner is 300mm.

The hearth must extend at least 300mm to the front and 150mm to either side It must be at least 12mm thick It must be made from non-combustible materials It must also cover a minimum area of 840 x 840mm If your stove heats your hearth to over 100°C, or it hasn’t been tested, the required thickness of your hearth increases to 250mm.

It must be at least 12mm in thickness. It must extend beyond the burner by 300mm to the front and 150mm on each side. Must be made from non-combustible materials. Total area covered must be at least 840mm x 840mm.