50mm Galvinised Steel Top Hat

PERFORATED CAVITY CLOSER 

Perforated galvinised steel top hat that is attached to the frame at its top plate.  When used in conjunction with our Custom Calv Perforated Cavity Closer and a cavity batten system, allows a clear ventilation path to keep your walls dry and healthy.

Has uniformly distributed perforations with a maximum aperture of 2 mm and a perforated area no greater than 20%.  Compliant to BAL 40.

Width: 50mm

Length: 2.7m

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