Noise Reduction and Security

In practice one meets the belief that when there is need for increased noise reduction , so-called Finnish-type 2+1 windows should be used, for there is larger air vent and, with the help of this vent, an extra noise reduction is achieved. This conception is incorrect. Noise reduction is achieved with a help of a multiple glazing unit and with an additional weather strip on sash perimeter and not because of the thicker window frames.. Otherwise it would mean that, in order to get some extra quality, many comforts have to be discarded.

Though, when talking about soundproof windows, the noise reduction cannot be increased indefinitely. The Rw of the window's with multiple glazing unit made by Haapsalu Uksetehas is 38-40dB maximum. Another thing that should be taken into account is that a window sash with a multiple glazing unit weighs more and may set certain restrictions on the window size.

Another supplementary quality feature that can be added, is security. This is achieved with the help of a laminated or tempered glass and with chubby security rated hinges .

The manufacturers offer hardware of different security levels. Lockable casement fasteners are available upon request.