Thermal Insulation

Wall Insulation

Typical homes will be built with 90mm cavities so you are limited to insulation that will fit this size. You can request larger frames from the builder but its not common and can cost a lot more. The standard wall R ratings are between R1.5 and R2.7 and in some cases there are separate ones at R4.0.

Another important factor is the thickness of the material used as this will limit the amount of insulation you can use.

Ceiling Insulation

Small gaps in ceiling insulation can cause a lot of heat or cold air to pass through. A good option is to use a cross hatch installation which crisis crosses each other.

Sarking / Wall Wraps

Its used for:

• Reduces draughts
• Reduces moisture entry
• Increases energy efficiency – These offer very little thermal insulation. Even the Bradford website has no measurements of its effectiveness.

More details can be found on the Bradford Wall Wrap section

Anticon

This is essentially a foil that is attached to an insulation blanket. Its common for colorbond roofs.

Sarking

This is used for:

• Helps protect against unseen mould growth from the entry of storm driven rain into the roof cavity
• Limits dust entering the home
• Improves thermal performance with Thermoseal
• Moisture control with Enviroseal
• BAL requirements with  Fireseal – Bushfire Attack Level (BAL).