Tempered, laminated, insulated and tinted glass: what each type does and where it belongs.

Traffic noise through a window is a glass problem as much as a wall problem. How acoustic laminated glass works and what upgrade is worth paying for.

Thickness decides strength, weight and price. A plain guide to the common millimetre sizes and what each is actually used for.

Bathrooms, entry doors and sidelights need privacy but not blackout. How frosted, acid-etched, sandblasted and patterned glass compare on light and looks.

Ordinary float glass is still the default pane in millions of windows. Where annealed glass is acceptable, where it is a hazard, and how it breaks.

One shatters into harmless granules, the other holds together on a plastic interlayer. Where each safety glass is required, and where one is simply the better b

An insulated glass unit is a sealed sandwich of panes, gas and spacers. When the third pane pays for itself — and when it is dead weight.

A microscopically thin metal layer decides whether your window blocks summer heat or winter loss. How to read the coating options on a quote.