Condensation on the room side of a pane is often about warm, moist indoor air meeting a cold surface. In Ayr, South Ayrshire, sea air and long wet spells make that surface colder more often, especially on rooms that face the Firth of Clyde or sit above damp ground.
A survey looks at how the house is lived in — cooking, drying clothes, closed vents — as carefully as the seals and glass. Fogging between panes of a sealed unit is a different problem from mist on the inside face. Neither is diagnosed from a website rule.
Ventilation, trickle vents and how a room is heated all affect moisture. We do not invent climate statistics or building-warrant rules here. A surveyor confirms what the property needs when they see the openings and how the rooms are used through winter.
If failed units or worn frames are part of the picture, start with Ayr double glazing or UPVC windows for a measured quote.