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Steel Floor Joist Insulation

Under-Floor Insulation System:
Steel Floor Joists

Heat-Ceil fitted to the bottom lip of C Channel Floor Joist with reflective airspace provides an extra insulation layer from reflective still air film.

Heat-Ceil combines 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 Floor Joist Centre's ?mm x 1200mm Cut and packed to ship.

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

Therma Ceil

May also use direct fix method

Total Thermal Resistance values based on Floor System described below:

Sub-floor Exposed or Enclosed / Heat-Ceil / Reflective still Air Space /Timber Flooring / Linoleum Floor Coverings

Total  R Values– Under-floor Insulation Systems
Heat-Ceil Placed on C Channel Bottom Lip with Reflective Airspace between Flooring

Building Sub-floor Heat-Ceil
Reflective Still
Air Space
Total R Value
Summer/Heat Flow In
Total R Value
Winter/Heat Flow out
Insulation Cavity
Exposed and Highly
50mm 38mm Rt 2.0 Rt 2.7 88mm
25mm 63mm Rt 1.5 Rt 2.7 88mm
Enclosed 50mm 38mm Rt 2.7 Rt 4.0 88mm
25mm 63mm Rt 2.2 Rt 4.0 88mm

* 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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