FAQs

Does age affect the thermal performance of VoidForm®?

No. EPS consists of 98% air and 2% polystyrene, and nothing else. Because of its cellular structure EPS is dimensionally stable, and will not settle over time. EPS used and installed correctly does not deteriorate with age and as such is able to deliver constant R-values for the life of the building.

Are the VoidForms® effected by the weather?

No. Rain will not effect the strength or thermal insulation properties of VoidForm®

Prolonged exposure to sunlight will cause a slight discolouration (yellowing) of EPS insulation and cause some surface embrittlement.

Are the VoidForms® durable?

Yes. Because EPS is an inert, organic material, it will not rot and is highly resistant to mildew. It also provides no nutritional value to ants, termites, or rodents.

Provided EPS does not suffer mechanical damage or failure of any fittings that may be used, it should have a life equal to that of the building in which it is installed.

Does VoidForm® burn?

Care should be taken to avoid fire sources near VoidForm® installations. If welding or grinding is to occur on top of voids then the hot sparks can represent a fire risk with the EPS.

Like timber, particleboard and other organic building materials, EPS will burn when in contact with a flame.

Barnes Voidforms are moulded in Fire Retardant EPS to minimise the risk of fire.

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