Spray-On Systems

Warm roofs can also be constructed by applying spray foam after installation.

Spray foam is typically polyurethane closed cell foam applied in thicknesses according to the insulation requirement. It can also be applied to walls, ceilings, and under floors. Spray foam may be applied to any roofing profile. It has a greater insulation value per millimetre than other insulation materials, so is particularly suitable for flat roofs and skillion roofs where there is limited air space.

Spray foam is non-absorbent (less than 1%) and has strong contact with all adjacent building elements. This makes it an effective vapour check, so internal moisture issues must be considered when using this or any other non-permeable system.