Fire compliance is increasingly becoming problematic for timber weatherboard products – particularly in applications which are close to boundary or more than 7m in height.
Intumescent primers can be used to protect timber from fire risk, and act as a fire retardant. An intumescent primer contains a substance that swells as a result of heat exposure.
The use of intumescent primers need to be considered as part of a system. Each timber species has its own reaction to fire, and the subsequent top coats of paint, can all affect the way a timber weatherboard reacts to fire.
For this reason it is important to test a specific timber, primer and top coat combination for compliance to the building code, typically using a test method such as ISO 5660.
Talk to the team at Abodo regarding fire retardant timber cladding requirements.