The Best Time of Year for Exterior Cleaning in Scotland

Most people book exterior cleaning in May, when the garden is about to get used and the winter growth has become impossible to ignore. It is a perfectly reasonable instinct and it is not quite the best timing.

The west of Scotland gives you a longer usable window than you would think, and the constraint is rarely the temperature on the day.

March and April are hard to beat. The winter growth is at its peak and at its most satisfying to remove, the surface has a full summer ahead to stay clean, and you are ahead of the rush rather than in it.

It is also the right time for driveway cleaning specifically, because the re-sanding afterwards needs the blocks properly dry, and you get more usable drying windows from March onwards than you do in the back end of the year.

September and October are the ones people forget, and for some jobs they are better than spring. Growth has finished for the year, so what you remove does not grow straight back the way an April clean partly does.

It is the right window for gutter clearing, once the leaves are actually down rather than halfway through falling, and for roof soft washing, where a biocide applied in autumn works through the winter and leaves the roof noticeably better by spring.

Nothing is wrong with a summer clean, and a patio done in June gets used the same week. The only real issue is availability: everyone wants the same fortnight of good weather, so lead times stretch.

Very hot, bright conditions do make soft washing slightly less effective, since the chemistry wants dwell time on the surface rather than evaporating off it. On those days we work the shaded elevations first.

Hard-surface pressure washing carries on through most of a Scottish winter without much difficulty. What does not work is anything relying on the surface drying out afterwards or on temperature-sensitive chemistry.

So: no re-sanding or sealing of block paving, because the sand will not drop into a damp joint and sealer will not cure. No soft washing in a hard frost. And nothing at height in high wind, which in practice rules out more winter days than cold does.

Frost is the real hazard rather than the cold itself. Wetting a surface below freezing puts ice on a path that somebody then walks on, which is not a trade-off worth making for a slightly earlier clean.

If it is bad now, have it done now. Waiting for the perfect month to clean a driveway that is already slippery is not a plan, and a slippery path is a genuine hazard rather than an aesthetic problem.

If you are planning ahead: driveways and patios in early spring, gutters and roofs in early autumn, commercial premises on a rolling schedule so the question never comes up. And whatever the month, we will tell you if the weather means the job should wait a fortnight. Ask for a quote and we will fit it to a sensible week.