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Secondary Glazing
For listed buildings or conservation areas, the slim aluminum frames used for secondary glazing are unobtrusive and almost invisible from the outside, retaining the external character of your property and thereby avoiding the need for local authority planning permission (local planning authorities class secondary glazing as removable items).ng are unobtrusive and almost invisible from the outside, retaining the external character of your property and thereby avoiding the need for local authority planning permission (local planning authorities class secondary glazing as removable items). Heritage Windows
![]() Heritage Windows Secondary glazing is another window fitted on the inside of an existing window, with soaring energy prices this is increasingly popular as it offers the following benefits:
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