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Strongest frames. Lowest bills.
With Revolutionary LOCKTIGHT™ Windows
At Big City Windows, we understand that quality windows are essential for your home to feel secure. Our LockTight™ vinyl windows feature innovative corner-locking technology, ensuring your home is well-insulated and safe in every sense.
Additionally, we prioritize energy efficiency and cost savings. We manufacture our LockTight™ windows with a 100% uPVC powder compound, providing fading, discolouring, cracking, and peeling resistance, plus warm edge technology for improved ventilation.
We dedicate ourselves to providing excellent customer service and exceeding expectations, ensuring our clients are delighted with their new windows. With a selection of secure, energy-efficient windows and an expert team to install them, we guarantee you enjoy new windows and lower annual energy bills with greater peace of mind.