Factors affecting the thermal insulation of aluminium windows
A window separates the outside and inside of a home. Thermal transmittance indicates how much cold or heat passes through the window. It is measured in W/m²K: the lower the value, the greater the insulating capacity.
Thermal break
The outer and inner faces are connected by a bar of insulating material, usually polyamide with glass fibre. This barrier reduces the passage of cold and heat through the frame and sash. The longer the polyamide, the better the thermal performance.
Central gasket
Central gaskets cover the space between sash and frame, improving the window’s thermal insulation and watertightness. All CORTIZO hinged windows include a central gasket to maximise performance.
Insulating foams
In addition to polyamide, other materials can improve the thermal behaviour of an aluminium window. Polyolefin foam can be inserted inside the frame, sash or glazing perimeter to reinforce the insulating barrier.
Glazing capacity
Glazing capacity is the space available in the sash to house the glass. The greater this capacity, the easier it is to install thicker glass or triple glazing, strengthening thermal and acoustic insulation.