Secondary glazing noise reduction case study

Описание: Secondary glazing sound insulation

KJM are an award winning Hampshire based installer of glazing. We specialise in secondary glazing as they offer the very best sound insulation. Based in Andover we have examples of most of our range in our showroom

The video was filmed in Kew, on the Heathrow flight path. The video shows the results of the original sash window that peaked at just over 50 db. The introduction of secondary glazing with Stadip 6.8mm acoustic glass and a far from ideal gap between the original window and the new glazing shows a new sound recording level drop to below 30 db - an impressive 20 db drop. The sound was actually recorded right up against the window, so would of improved further into the room.

Secondary glazing is a great way to enjoy warmth, security and quietness of double glazing without replacing your existing windows. Secondary glazing will reduce sound transmission by up to 70% and improve your heat insulation. Secondary glazing is ideal to reduce noise and draughts.

Secondary glazing is particularly useful when replacement windows are not suitable for your property and is ideal for homes that are traditional, listed buildings, in conservation areas or just don’t need replacing. The slim aluminium frames are strong and durable providing many years of service. We install secondary glazing across Hampshire, Wiltshire, Dorset, Berkshire & Surrey.

Secondary Glazing Sound Insulation

The gap between the original window and the new secondary glazing is one of the most important things to consider regarding sound insulation. The most common size pane of glass in the original household glazing would typically be around 4mm, unless the property is pre 20th century, then it could be 3mm.

So if the original house glazing is 4mm and the secondary glazing is 4mm, the gap would need to be around 150mm between the original window and the new secondary glazing for optimal sound insulation.

With 6mm glass in the secondary glazing this gap could be reduced to 100mm.

If the reveal (or window cill depth) cant accommodate a 100mm gap then laminate or acoustic glass like Stadip should be considered for maximum sound insulation.In general terms the larger the gap the better the sound insulation.

Stadip Acoustic glass for the best performance

Stadip Silence glass is a laminated product from Saint-Gobain. Laminated glass is a sandwich made of one piece of plastic Poly Vinyl Butyral (PVB) between two or more glasses. The PVB in Stadip glass is a special acoustic interlayer - PVB Silence®. This layer acts like a dampening core between the two panes of glass. It prevents vibration, eliminating the problem of the critical frequency and thus the acoustic peaks at high frequencies.

Further information -
https://www.kjmgroup.co.uk/products/w...