Accurately measuring your old window opening is crucial for installing uPVC double glazed windows. These windows are custom-built and cannot be returned if ordered incorrectly. Therefore, for all replacement windows and double glazed doors, and in some new constructions, our trained technicians will take measurements before manufacture in Sydney. Most windows and doors are produced with a +/-2 mm accuracy, ensuring the best fit.

We recommend that energy efficient windows and double glazed doors be installed and glazed by qualified technicians or builders. However, we receive many requests from DIY enthusiasts for supply-only options. While we can supply double glazed windows and doors on this basis, some clients' self-installations have compromised the product quality. For instance, an uncovered gap between the wall and window can reduce noise insulation and energy efficiency.

Please note, we are not responsible for incorrect installations we did not perform. Contact the installer for issues. We have successfully corrected poor installations of double glazed windows and doors, even those from competitors, but a fee applies based on the job's complexity and number of items involved. We also provide consultation services for builders unfamiliar with uPVC double glazed windows.

To help avoid DIY disasters, we created installation tips based on our experience correcting issues. These are suggestions rather than a step-by-step guide, as each installation may have unforeseen difficulties requiring expert knowledge. Before starting, check the size, style, and position against the order. A correctly installed double glazed window is ineffective if upside-down or meant for another room. uPVC windows are not load-bearing, so a lintel may be required above the window. If unsure, consult a qualified fitter or surveyor. The new window should be about 10 mm smaller in height and width than the brick opening. Clear the site, removing curtains, blinds, and ornaments.