Advice from the people who make the windows
Plain-English guides to choosing, specifying and looking after PVCu and aluminium windows and doors. Written by KNM, not by a marketing agency.
PVCu or aluminium? Choosing the right frame material for your home
Both materials make excellent windows and doors. The right one depends on the size of the opening, the look you want and the budget. Here…
Bifold or sliding doors: how to choose
Bifolds clear the opening; sliders keep the view. Which is right depends on how you will use the room for the other eleven months of the…
Understanding U-values and window energy ratings
U-values, Window Energy Ratings, centre-pane figures and low-E glass explained in plain English, so you can compare quotations properly.
How to measure and specify windows for a trade order
A practical checklist for installers sending sizes to a fabricator: brick sizes versus frame sizes, deductions, opening configurations and…