The key part of the installation process for double glazed windows and double glazed doors begins before you place your order. Accurate measurement of your old window openings is essential. Custom-built UPVC double glazed windows and doors cannot be returned if incorrectly sized. Hence, for all replacement windows and doors, and certain new constructions, our trained technicians will take their own measurements before manufacture in Sydney. Our energy efficient windows are manufactured with high precision to ensure the best fit possible.

Use these guidelines for cost estimation purposes only: To measure the width, measure the frame from wall to wall in three places: near the top, middle, and bottom of the window. Decide whether you want to keep the same number of openings and if the size allows. For the height, measure from the top of the window cavity to the bottom.

Do not assume all windows are the same size. Draw a rough sketch of your house and number each window you plan to replace, then measure each one individually. Fixed panels separated by beams or brickwork are treated as separate double glazed window panels and priced accordingly.

We do not keep standard windows and doors in stock; each double glazed window and door is manufactured to your individual specifications.

Report sizes in millimeters, width first, but always label sizes with width and height and the window number and/or location to avoid confusion. Generally, there is no significant difference in sizes taken by clients and us. We typically cover the cost of minor rounding or measurement errors, but this does not extend to major mistakes like omitting half the window length.