The advantages of timber
The thermal performance of a window is measured by its R-Value. A minimum of 0.32 is required to achieve ENERGY STAR qualification. “We can nearly double that,” says Riley. And the thermal benefits of timber have always been well known.
Aluminium is a very good conductor of heat: its thermal conductivity is 160, compared to timber with 0.12. “What’s different now is that we’re manufacturing the whole window to a much higher spec, including the seals that we put in, the double-glazing units, and the spacers we put in those double-glazed units.”
Architecturally, this increases design flexibility dramatically, while still achieving the minimum R-Value that the house needs to comply with to meet code. And McNaughton’s can assist architects in calculating the thermal values of windows and doors with very accurate data. “We can use very specific BRANZ approved calculations that demonstrate the timber windows and doors are thermally advanced.”
“We can make practically any design as long as it fits with building code and the architect’s able to get compliance.” Timber designs are also able to stand the test of time. “There’s many, many examples of windows and doors out there made out of timber – with a sand and a paint they actually look quite great.” In addition to that, there are the potential savings of around $500 a year – even more in colder environments than Auckland. Because it is so easy to restore timber and keep it looking stunning over decades, the savings and benefits of ENERGY STAR-qualified timber windows will certainly add up.
For people wanting to know more about how ENERGY STAR-qualified windows can improve the thermal performance of their home, McNaughton Windows and Doors are the only company manufacturing an ENERGY STAR-qualified timber window system. Their expert team is available to offer advice and solutions to architects, builders and homeowners.