Spray Foam Roof Insulation and Ceiling Insulation

Why should you use spray foam roof insulation and/or ceiling insulation? What about having a nice cool home in summer and a nice warm home in winter.

In a roof space temperatures can often approach 60C or more during the day. Most of this heat enters the roof space through several processes. First, solar energy warms the roof, which then transfers heat to the rest of the roof space through conduction, convection and radiant heat transfer. The 60C temperature of the underside roof surface then drives the heat transfer process

By applying spray foam roof insulation, the surface temperature exposed to the roof space (the temperature driving the heat transfer) Roof Insulation and Ceiling Insulationis reduced by as much as 50%. Both conduction and convection heat transfer are proportional to a temperature difference, so that heat transfer will be reduced accordingly with a drop in surface temperature.

The same applies to ceiling insulation. Ceiling insulation stops any residual heat (or cold) propagating downwards.It also has the benefit of stopping any heat transfer during the winter months escaping into the roof space. Ceiling insulation also gives the benefit of reducing any cool air escaping during the summer months .

The benefits of using spray foam
roof insulation:

  • Duct leakage and heat loss or gain from ducts is much less of an issue.
  • Air sealing is easier in the roof than in the ceiling.
  • Dust and loose insulation are less likely to migrate down to the living space.
  • Energy costs are lower when the attic is sealed.

In conclusion spray foam roof insulation and ceiling insulation: –

Reduces energy costs and loss in several ways. Energy loss from ducts located in the attic is essentially eliminated. The top of the building is much tighter resulting in less infiltration and ex-filtration, so excess moisture isn’t pulled into the attic. Infiltration through the ceiling is also reduced. In addition the attic temperature is lower. Roof insulation also further reduces energy loads.


If intending to convert your roof space into another room this is an ideal time to apply spray foam insulation prior to doing this. With attic roof insulation you will reap the benefits in years to come.

Want to live in a more comfortable home? Don’t hesitate to call us on 0421 395 315  or  request a quote for roof insulation and make your house cooler in summer and warmer in winter.