Is concrete OK for a hearth?
Is concrete OK for a hearth? Building a concrete hearth as opposed to using stone or brick is a good choice because concrete is relatively cheap compared to other materials. If the hearth being built is a raised hearth — that is, the hearth is not flush with the floor but is instead raised off the floor. How big should a hearth be NZ? 450mm wide 4 NZS 7421: 1990. Specification for installation of solid fuel burning domestic appliances. specified minimum of 450mm wide. The timber trim to the hearth also posed a fire risk. What can I use for...