Spray Foam Insulation Application On Underside of Roof Decks
Commercial building roofs, typically metal, have large surface areas which can lead to substantial heat loss and/or gain. Critical design considerations of flat or low pitch commercial building roofs include:
- Simplicity of the installation
- Thermal performance
- Initial cost, maintenance costs and lifetime costs
- Life expectancy
Icynene spray foam insulation applied on the underside of the roof deck in commercial buildings allows for a significant reduction in condensation potential, particularly compared to interior air permeable batt systems.
Warm air holds a large amount of moisture and can generate serious problems if allowed to make contact with cold roof surfaces. Icynene spray foam insulation inhibits the movement of humid indoor air up to the underside of the roof deck, helping to prevent condensation forming. It’s worthwhile to consider that a vapor retarder may be required where high interior humidity or extreme climate conditions exist.
Additionally, spray foam on the underside of the roof deck:
- Can reduce construction schedules due to reduced access needs
- Maintains form over the long-term
- Adheres to all substrates
- Easily insulates penetrations and unusual roof shapes including domes and arches.
Design Note: Insulating Steel Roofs
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