Slender Fit double-glazed units allow you to have traditional wooden sash windows fitted with a thin double-glazed unit. These bespoke units can also be installed to existing wooden frames to reduce costs.
When compared against single glazed units, Slender Fit can reduce heat loss by over 75% and can achieve a U-value as low as 1.2 depending on the type of gas used.
By utilising the latest technology, it is possible to construct a double-glazed unit with a very small cavity between the panes of glass. The cavity is filled with a gas to obtain U-values to comply with building regulations.
Units are available in different configurations: A 4mm clear outer pane with selected cavities of 4mm, 6mm or 8mm. The wider the cavity the better the insulation.