Timber provides one of the best insulation values of any material used in the construction of a window and has been used extensively over the last hundred years.

Timber windows have been single glazed because of the inability of bulky standard double glazed units to be glazed into timber windows, particularly timber windows with narrow beading, which are not acceptable by Planning Authorities for conservation, listed or graded buildings.

Slimlite Double Glazed Units open up many possibilities for the manufacturer of timber windows.

Slimlite units will fit into the rebates of an astragal. This prevents the perimeter seal being visible and a rebate astragal could accommodate a Slimlite unit with a front putty or beading surround.

There is enormous potential in the replacement of Slimlite units into single glazed windows, as Slimlite units will fit into most single glazing rebates.

When Slimlite Double Glazed Units are glazed into a timber window, they are undetectable, unless examined close up .

Planning and Conservation Authorities should consider the use of Slimlite Double Glazed Units in Conservation and Listed or Graded Buildings as there is no change to the physical appearance of a window, providing the property owner a reduction in energy consumption, therefore a reduction in carbon dioxide emissions.