Wooden Timber Windows, Doors and Stairs
High Quality, Long Life, Bespoke
Part L Building Regulations
The new Building Regulations have been introduced to save energy. Barnsdale's windows have very good thermal performance. By using timber from renewable resources and with long-term low maintenance, they will give decades of service.
Part L allows various methods for calculating U values. The most accurate and adaptable is to use software to BS EN ISO 10077-2. Barnsdale use Therm with Window for all calculations
Our standard window range sheet outlines the U value for the specified standard size in the regulations. This can be used to show compliance. However it is better to produce the results for each window size and configuration.
The Therm software produces these heat loss diagrams which are very helpful in product development. In the designs of our new standard range of windows we have looked at the effect of altering different features and produced a range of very efficient windows.
As a rule, the more glass in the window the better thermal performance and for very small windows the type of spacer bar in the glass can have an increasing effect on the overall U value.
Although some buildings, such as those in conservation areas, may have exemption, in most instances it is possible to produce a window with good thermal performance and have the same looks as those originally fitted.
Glass with coatings on both the inner and outer pane or triple glazing can also be supplied.
Care must be taken regarding the visible effects of coated glass. If some glass on an elevation has coating and other does not the difference can be striking. End users are often unhappy that coating can make curtains look dirty from the outside. There are a number of neutral coatings available that may help this.