Standard
Our standard timber window has a simple profile with 4mm radius on all edges. Our standard profile timber windows comes complete with 24mm a rated double glazing (4/16/4) with an overall U value from 1.31 W/m2k.
Energy Line
Our Energy timber window has a 78mm profile offering higher energy efficiency over our standard window due to the deeper profile. Our enery windows are fitted with 40mm triple glazing (4/14/4/14/4) achieveing an overall U value from 0.97 W/m2k.
Thermo Line
Our Thermo timber window is our thickest profile at 92mm and therefore offers the best energy efficiency within our JKG timber range. Our Thermo windows are fitted with 48mm triple glazing (4/18/4/18/4) achieveing an overall U value from 0.80 W/m2k.
Historic
All of our profiles including Standard, Energy and Thermo are also available in a historic profile. Our historic window can be supplied in various different frame profiles and styles to match the original windows on your period home or building ensuring there is no compromise in the asthetic of the window when choosing to upgrade to a more effieienct system.