If you own a flat in one of Glasgow’s sandstone tenements, you’ve probably noticed something the guys who clean windows for a living notice too: the stone stains in a way that brick and render just don’t. A window cleaner who’s only ever worked on modern houses can do real damage here without meaning to…

If you’ve searched “how much does window cleaning cost in Glasgow,” you’ve probably found a dozen different answers — and half of them don’t even mention tenements, factors, or the fact that Glasgow’s weather changes the maths entirely. Here’s a straight answer, based on what actually affects the price of a job in this city….