Wooden Timber Windows, Doors and Stairs
High Quality, Long Life, Bespoke
Glazing & Plant on Bars
Introduction
Barnsdale windows are fitted with high quality sealed double glazed window units. Correct installation of these units ensures high performance for many years. The use of plant on bars can also be used to provide traditional aesthetics on modern, high performance windows.
Specifying Glass
The selection of glass has a key effect to the windows performance. Correct selection is important to achieve the desired result (for more information see glazing guide).
Security/Safety
Laminated or toughened glass will both enhance the security and safety of a window. Laminated glass is thicker and will reduce the cavity which may affect the thermal performance. On large units toughened glass tends to appear slightly rippled.
Thermal Performance
We normally only supply soft-coatings as they have a superior thermal performance and are more neutral in appearance, however they are not normally available toughened. Insulated ‘Superspacer’ bars will improve thermal performance particularly on smaller units . Argon filled cavities also improve the thermal performance of the glazing unit. The diagram shows an image from the Therm software we use to calculate thermal transfer and to maximise the thermal performance, of both the glazing and the window unit. For further information see thermal performance.
Acoustic Performance
Sound transmission generally reduces by mass. The best performance we have achieved is by using 10mm float glass with 8.8mm acoustic laminated glass. The laminate has special sound reducing properties. Windows of this type require very thick sashes and heavy duty ironmongery. If both panes of glass are acoustic laminated further improvements can be made. For more information on our extensive research into acoustics got to Acoustic Windows.
Aesthetics
Plant on bars can be used to very accurately imitate original Georgian style windows, whilst using modern techniques to create a very high performance product. When plant-on bars are used, interbars can be built into the glazing unit to emulate the traditional design where glazing bars would divide the glass unit. The interbars are therefore lined up to where the plant on bars will later be attached and the colour of the interbars can also be chosen to match that of the spacer bar around the edge of the unit, however the interbars are only available in aluminium and not in the Superspacer bar material. Options of these are shown on the picture opposite.
Manufacture
- Once the sashes have been fully finished a glazing tape is applied to the rebate.
- The piece of glass is tried for size.
- Packers are put in place and the glass is put in and pushed down for a good fit to the glazing tape. The beading is cross-cut to fit.
- Tape is applied to the beading ends and installed using headless pins. Pin holes are filled.
Additional Materials Used:
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