Glazing

Longden timber windows can be specified with single, double or triple glazing of the highest quality to achieve outstanding thermal and acoustic insulation, protecting buildings from heat loss and noise.

The tables below outline the exceptional U-values that can be achieved from each window construction and style. Windows can be specified with U-values as low as 0.8W/m2K and are certified by the Passive House Institute in Darmstadt making them the perfect energy-efficient window solution for any project.

Timber Windows

Window Profiles	Tilt & Turn		Casement			Vertical Sliding Sash
Function	Inward Opening		Outward Opening			Sliding
Frame Depth	68	88 Passive	93	114	68	164
Sash Depth	68	88	75	56	68	56
Glazing
Single
Double
Triple
Thermal Insulation (U-value)	1,3	0,8	1,5*	1,5	1,3	1,7

Timber-Aluminium Windows

Window Profiles	Tilt & Turn		Casement
Function	Inward Opening		Outward Opening
Frame Depth	68	88 Passive	93	114
Sash Depth	68	88	75	56
Glazing
Single
Double
Triple
Thermal Insulation (U-value)	1,3	0,8	1,5	1,5