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  1. IWI to retained window with insulated reveal board

    Detail for internal wall insulation to an existing window, to be retained, with a thin jamb profile, requiring a slimmer reveal board to provide continuous thermal insulation.

    Target Values Cill: 0.045 W/mK. Lintel: 0.059 W/mK. Wall U-Value: 0.3 W/m²K

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