
Foilboard panel shown installed beneath timber floor framing, demonstrating an underfloor insulation application with the reflective panel facing below the floor structure.

Foilboard panel shown installed beneath steel floor framing, demonstrating an underfloor insulation application using a rigid reflective insulation panel.

Foilboard panel shown installed beneath timber floor framing, demonstrating an underfloor insulation application with the reflective panel facing below the floor structure.
RETROFIT METHOD
Retrofitting existing homes with Foilboard Insulation Panels under timber or steel joists is an effective way to enhance energy efficiency. Full panels are installed for maximum coverage, with all joins sealed using Foilboard Green or Silver Tape to create a continuous thermal barrier. Panels can be secured with Foilboard Blank Plates or with our Standard and Ultra Fasteners, designed specifically for timber (nail fix) or steel (screw fix) applications. This ensures a secure, long-lasting installation that provides year-round comfort.
INSTALLATION ACCESSORIES
Depending on your application, choose one of the following:
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Timber Fasteners: Use when fixing Foilboard to timber using nails.
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Steel Fasteners: Use when fixing to steel using screws.
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Blank Plate Fasteners: Use when supplying your own nail or screw (non-standard fixings).
**Foilboard Insulation Panel Dimension: 2400mm x 1200mm (2.88m2)**