Wooden Timber Windows, Doors and Stairs
High Quality, Long Life, Bespoke
Specifying Glazing
Glass obviously forms a substantial part of a window and before specifying the type required the following points need to be considered:
• Thermal loss
• Solar gain
• Acoustic
• Security
• Safety
• Obscure
Thermal performance
Barnsdale's have carried out extensive research on the effects of using different glazing systems. We have the widest range of BFRC Energy Rated windows in the country and are currently developing more.
In this country, the use of triple glazing does not normally provide an advantage. A high performance double glazed unit when solar gain is considered, will normally equal the performance of a triple glazed unit.
The major influences on thermal performance are:
- The coating on the glass
- The type and width of spacer bar between the 2 pieces of glass
- The medium in the cavity (gas or air)
Our standard we apply a softcoat coating. This provides very good performance and has a neutral look. We have a large choice of sash width, so the gap can be changed, but normally a gap of 16mm with a filling of argon will provide good performance at a competitive price. Krypton will provide better performance but only significantly better than Argon when the gap is very small.
We supply either traditional aluminium spacer bars or for improved thermal performance a warm edge spacer.
Solar Gain
Solar gain can be good when the windows are relatively small and bad when they are large. The energy rating of windows takes into account solar gain and to improve this the glass coating needs to be considered along with the type of glass. Low iron glass has a very positive effect.
We can supply coatings that can substantially reduce the solar gain which can, for example, reduce air conditioning running costs.
Acoustic Performance
The thickness of the glass, the material used in the centre of laminated glass and the gap between the glass all have an effect on acoustic performance. We have carried out a wide range of tests using different systems in different sash widths and can provide technical help and data to deal with individual requirements.
Security
Most of our windows and door sets have very good security performance. Our glazing systems are capable of achieving British Standard 7950. Standard laminated glass will give very good security performance.
Safety
Toughening coated glass has been a problem in the past but the latest types we are using can be toughened. It is therefore worth considering whether the glass should be toughened or laminated.
Obscure
We can provide a wide range of obscure glass. If privacy is an issue.