uPVC windows are rigid frames made from unplasticized polyvinyl chloride. The "u" means no plasticizers were added to soften the polymer, so the profile holds its shape instead of flexing. That is the difference between a window frame and flexible PVC products such as cable insulation, sheet flooring, and garden hose.
A DraftLOCK™ vs. standard window decision is a seal and frame decision. A standard window sits in the 3 1/4 inch frame the industry treats as typical, with a seal setup that varies by maker. DraftLOCK closes with a triple seal and a welded frame built 4 5/8 inches deep, so the unit can sit further into the wall.
Most people arrive at this question in one of two ways. Either a room has stopped feeling comfortable, or you have two or three quotes in front of you and one of them prices triple pane as an upgrade you were not expecting. Both routes lead to the same practical question: is the third pane worth it in your home, or is a well-built double-pane window already enough?
Two fundamentally different approaches exist for assembling window glass: pre-sealed units made by a dedicated glass manufacturer such as Cardinal Glass, and units assembled in-house by window manufacturers themselves. Neither approach is inherently superior.
If you are comparing virgin vinyl windows against recycled vinyl windows, the short answer is that virgin vinyl offers more predictable and consistent material performance, while recycled content introduces variability that depends on the source, the processing method, and the proportion used.
The short answer is this: Sliding doors save more interior space in most homes. A sliding door moves along a track and stays within its own frame line, meaning it never takes up floor area when opening or closing. A hinged door, by contrast, needs a clear swing arc that can reach up to 1.2 metres, depending on the door size.