The Building Centre in London
Visit our showroom in London.
Book an appointment to meet with one of our designers
and discuss your project.
Learn More
Architectural Bronze Casements,
Belton Park,
Londonthorpe Road,
Grantham,
Lincolnshire,
NG31 9SJ.
The Heritage System is a solid metal casement providing the traditional look of putty glazed casements. It is most suited to heritage properties, where fine sightlines and aesthetics are a consideration. The frame incorporates double weather seals and will accept single glazing or up to 16mm double glazed units, providing much improved energy and weather performance over traditional alternatives. Our most suitable system for achieving curved or shaped casements to your specification.
| Slim Frame Profile |
| Single Glazing & Traditional Leaded Lights |
| Double Glazing (12mm - 16mm) |
| Historic/Period Buildings |
| Tight Radius Curved Windows |
| Side Hung Unit |
| Top Hung Unit |
| Security Options Available |
| Double Weather Seal |
| Rebated Leg Profile |
| Equal Leg Profile |
| Vertical and/or Horizontal Glazing Bars |
| Hinge & Silicone pointed glazing on outside |
| Leaded or Plain Units |
| Optional Trickle Ventilation |
| Saddle Bars |
The tests below are carried out on side-hung outward opening windows measuring 1645mm x 600mm and are tested excluding any additional security features.
BS 6375 Part 1: 1989 (exposure categories measured in pascals)
| Wind | 2000 Pa |
| Water | 200 Pa |
| Air | 600 Pa |
| Exposure Category | 2000 Special |
BS 6375 Part 2: 1987
| Operational and strength characteristics | PASS |
BS 7950: 1997
| Enhanced security performance | PASS |
Side Hung Casement
| Max O/a Width | 650mm |
| Min O/A Width | 200mm |
| Max O/A Height | 1700mm |
Area of side hung casement must not exceed 1.105m2.
Casements over 1100mm high will require 2 handles.
Where width is greater than height, casement sash must be top hung.
Top Hung Casement
| Max O/a Width | 1200mm |
| Min O/A Width | 300mm |
| Max O/A Height | 500mm |
| Min O/A Height | 300mm |
Fixed Lights
| Max O/A Width | 1200mm |
| Max O/A Height | 2400mm |
The inclusion of glazing bars, trickle ventilation, opaque glazing and abutment details may alter performance data and design limits.
Please contact our sales team to discuss any requirements outside of the standard size limits detailed above.
U-value performance based on an 16mm double glazed unit made up of 4mm float/8mm 90% Krypton filled cavity/4mm Planitherm total + with warm edge spacers.
| Fixed casement overall value | 1.7W/m2K |
| Opening casement overall value | 1.9W/m2K |
| Centre pane value | 1.2W/m2K |
When incorporting a genuine Georgian bar add 0.4 to the U-value.
U-values calcuated in accordance with BS EN iso 10077-1:2006 based upon a single fixed light sample 1230mm x 1480mm and a single opening light sample 1230mm x 1480mm. Inclusion of glaze bars, trickle ventilation or equal leg will affect performance.
