50 mm I-Stud (PI50) with standard track (SPT52)., 50 mm I-Stud (PI50) with Deep track (50 mm leg, SPEDT52).
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Insulation
Not required., 25 mm-thick glass mineral wool., 50 mm-thick glass mineral wool.
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Linings
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Inner layers
Siniat GTEC 12.5 mm Standard Board., Siniat GTEC 15 mm Standard Board., Siniat GTEC 12.5 mm dB Board., Siniat GTEC 15 mm dB Board., Siniat GTEC 12.5 mm Fire Board., Siniat GTEC 15 mm Fire Board., Siniat 15 mm Megadeco Board.
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Face layer
To match inner layer., Not required/ not applicable.