Secondary double glazing for sash – traditional windows

Ranges

A heavy duty vertical sliding system operating with specialist balances that allow large and weighty panels to operate with ease. The system is used to treat the sizable sash windows often found in Victorian and Edwardian buildings. A thicker range of glass offers higher levels of noise insulation and a robust lock option achieves enhanced security and Secured by Design accreditation.

Recommended maximum frame sizes (mm), subject to balance capacity

H	W
3600	2000

Balance Capacity

Maximum area dictated by standard 50Kg balance capacity or 65kg to special order.

Glazing Range

6mm to 12.8mm

Frame Finishes

Standard white (HIPCA semi- gloss).

Any standard powder paint, wood grain or anodised finish to order.

Performance
Styles and Details
Ironmongery

Warmer

A Series 90 window will reduce heat loss by up to 50% using standard glass and up to 65% with a thermally efficient glass (low-E). High performance brush seals will almost eliminate drafts and ensure much greater comfort near the window.

The effectiveness of the insulation is measured by U-values, the lower the figure the better the insulation.

INSULATION (U-VALUE) CALCULATED IN COMBINATION WITH A PRIMARY WINDOW AT BRFC SAMPLE SIZE OF 1430 x 1230MM

GLASS	METAL PRIMARY WINDOW	TIMBER PRIMARY WINDOW
6 - 12mm	2.89 W/m2K	2.62 W/m2K
6 - 12mm low-E	1.93 W/m2K	1.80 W/m2K

Quieter

A Series 90 sliding window set 100mm apart from the existing window will reduce noise levels by more than 44dB (decibels). This can achieve World Health Organisation guidelines for quiet living and working environments even in quite challenging noise environments.

NOISE INSULATION MEASURED IN COMBINATION WITH A PRIMARY WINDOW

GLASS	50MM CAVITY	100MM CAVITY	200MM CAVITY
6 - 6.4mm	40 dB (Rw)	44 dB (Rw)	46 dB (Rw)
6.8 - 7.5mm	41 dB (Rw)	45 dB (Rw)	47 dB (Rw)
8 - 10mm	42 dB (Rw)	46 dB (Rw)	48 dB (Rw)
10.8 - 12mm	43 dB (Rw)	47 dB (Rw)	49 dB (Rw)

Safer

The Series 90 window fitted with a concealed and secure multi-point locking system is a Police Preferred Specification under the Secured by Design initiative. Higher levels of intruder protection are achieved by using thicker ant-bandit laminate glass. These specifications will also provide more significant levels of blast protection.