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Heat-Ceil Roof Insulation System: Conventional Roof

Heat-Ceil placed between rafters with an airspace below improves thermal values by providing an extra insulation layer from reflective still air films.

Heat-Ceil combines the exceptional thermal qualities of EPS and reflective air films into one easy to use product that requires no special masks or clothing for installation.

Product Description: Heat-Ceil Insulation is a light weight rigid board made of an SL grade polystyrene core with pure aluminum foil laminated to both sides that reflects 97% of radiant heat, contains fire retardant and is water resistant.

Sheeting Sizes Rafter Centre's mm x 1200mm for placing over rafters.

Heat-Ceil alternatively placed with 100mm airspace improves thermal values or saves money from thinner insulation.

Example: Total R 2.0 summer climate achieved from Building Insulation System below:

Therma Ceil Therma Ceil
60 kg Light Weight Pallets Heat-Ceil cut to fit between rafters with still airspace below and reflective sarking above

Total Thermal Resistance values based on Floor System described below:

Metal Roof / Sarking /Unventilated Attic / Heat-Ceil / 60mm Reflective Still Air Space /10mm Plasterboard

Total Thermal Resistance Values Roof Insulation System
Heat-Ceil Fitted with Reflective Airspace Below and Reflective Sarking above.

Roof Sarking

Heat-Ceil Insulation

Reflective Still Air Space

Total R Value Summer/Heat Flow In

Total R Value Winter/Heat Flow out

Insulation Cavity (Total)

Unventilated Reflective Attic



Rt 4.0

Rt 2.7


40mm 60mm Rt 3.7 Rt 2.3 100mm

* Determinations Based upon AS/NZS 4859.1:2002/Amdt 1 2006, Materials for Thermal insulation of buildings.

Changes to the building systems described above will alter the total thermal resistance value.

Ceilite provide a Thermal Insulation Evaluation from certified engineer for any specified building system.

The Building Code of Australia also list the thermal properties of both polystyrene and reflective airspaces.

We invite you to contact us about having your individual building system tested
or to arrange a completely independent 6 star energy efficiency report.


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