Ceiling & Roof Insulation Services

The most cost-effective place to start an insulation assessment.

A house can lose up to 45% of its energy through the ceiling.

The Enviroflex ceiling insulation product range offers long-term benefits to homeowners, and comes with manufacturer’s warranties.

Roofs and ceilings work in conjunction with each other in relation to reducing the transfer of hot and cold energy. When evaluating your ceilings, we can also review the roof of your home and provide insulation options for installation directly under your roof tiles to reflect radiant heat.

Bulkheads should be insulated as they are subject to the same temperature extremes as ceilings. Garage and adjoining enclosed spaces should also be insulated when under the same roof line to reduce the transfer of heat/cold through to the main structure. Veranda roofs should be insulated in hot climates where outdoor living spaces are used extensively, to reduce radiant heat gain. Heat build-up under verandas not only affects the space below but can affect conditions inside the house.

To reduce the risk of electrical short circuiting, electrically conductive insulation must not be laid across ceiling surfaces or ceiling joists, or under subfloors. Electrically conductive insulation must also be secured with non-conductive staples. Safety is a key reason to use the service of an insulation specialist such as Enviroflex to ensure the safety of the installer and the compliance of the installed insulation.


Bulk insulation mainly resists the transfer of conducted and convected heat, relying on pockets of trapped air within its structure. Its thermal resistance is essentially the same regardless of the direction of heat flow through it.

Bulk insulation includes materials such as glass wool, wool, cellulose fibre, polyester and polystyrene. All bulk insulation products come with one material R-value for a given thickness.


Reflective insulation mainly resists radiant heat flow due to its high reflectivity and low emissivity (ability to re-radiate heat). It relies on the presence of an air layer of at least 25mm next to the shiny surface. The thermal resistance of reflective insulation varies with the direction of heat flow through it.

Reflective insulation is usually shiny aluminium foil laminated onto a substrate.Dust settling on the reflective surface greatly reduces performance.


What is the difference between foil and batts?

Foil acts as a reflective form of insulation reflecting the radiant heat away. Bulk insulation such as batts stop the transfer of heat. Read more!

What is cellulose insulation?

Generally made from shredded newsprint and used for ceiling insulation. It was a very common and cost effective form of insulation however, it does deteriorate over time and requires topping up after anything between 7 and 15 years.

What is Earthwool?

It is a glasswool insulation product made from recycled glass. It provides thermal and acoustic properties, is non-combustible and does not contain formaldehyde.

Why is Earthwool “not as itchy”?

The ‘super soft’ feel of Earthwool comes from a revolutionary, patented binder made using renewable bio-based materials.

Why choose polyester?

Polyester is a good option for people with allergies as it does not shed small particles. It is the same material found in doonas and pillows. Polyester will not corrode or deteriorate over time and can be recycled at the end of its use.

What is reflective insulation?

Reflective insulation is a foil product which works by reducing the radiant heat transfer across an enclosed space. It works most effectively when placed with the shiny side facing an enclosed air space of at least 25mm.

The smartest place to install reflective foil is in walls or as sarking under the roof, as it reflects radiant heat away from the interior of the building in summer. For maximum effectiveness, reflective insulation needs to remain clean and dust free, as dust build up will reduce reflectivity. Any gaps in the foil will also reduce its performance.

Why use SuperQuilt?

SuperQuilt works most effectively by reflecting infra-red radiation. It is a solution that is thin and flexible. R-Value able to be reached is between 2.5 – 4.9.

What is SuperQuilt made out of?

SuperQuilt is a multi-layer foil insulation which deals with all forms of energy transfer, conduction, convection and radiation.

It is only 40mm thick but has 19 layers of material including reflective foil, Expanded-Polyethylene & Polyester Wadding.