Perimeter Sealing System

Sash windows need a minimum of a 3mm air gap to allow them to operate, which is the root cause of the nuisance rattles and draughts normally associated with sash windows.

However, the installation of the Ventrolla Perimeter Sealing System effectively fills these gaps with it's patented pile, which:

• Virtually eliminates air ingress and reduces the air-change rates to 0.7acph, which is the recommended adventitious ventilation rate for a building. In fact under test conditions on an actual site, the Ventrolla Perimeter Sealing System achieved a rate of 0.4acph.
• Achieves BS 6375 Part 1 Class 3 600 Pascals, which equates to a wind speed of 71mph. 
• Removes nuisence rattling of the sashes.

Another important measurement of a window's performance is noise reduction. Independent testing of Ventrolla's Perimeter Sealing Sytem, installed into a sash window, fell within the 6-10 dB(A) noise reduction range, which in acoustic terms is deemed to provide a 'significant' noise reduction.

Whilst the Ventrolla Perimeter Sealing System can provide a positive impact on noise reduction, however this should be viewed as an added benefit, rather than as a solution to an external noise control problem.