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With all our  DIY secondary glazing system you need a height kit and a width kit to complete a two-pane installation. Height kits contain all the vertical sections for the double glazing.
Width kits contain all the horizontal sections. All DIY secondary glazing kits include fitted draught-proofing seals and step-by-step instructions together with accessories and fitting aids such as screws and wall plugs. Having measured the height and width of your window recess simply select the nearest longer size.