The Best Time of Year to Clean a Patio in Sussex

There is a right answer for the result and a different right answer for the price, and they are two months apart.

What the demand actually does

Interest in patio cleaning is one of the most seasonal things I have ever looked at.

Searches climb about 66% from January to February, then a further 91% from February to March. From the trough in midwinter to the peak in late spring the difference is roughly five to one.

That is not a gentle seasonal drift. That is the entire year’s work arriving in a four month window, and it has consequences for anyone trying to book.

What that means in practice

In January my diary has gaps. In late April it does not.

By the middle of March most one-person operations round here are quoting three to four weeks out. By late April it can be six. The people who ring in the first warm week of May, having looked at the patio and decided something must be done before the bank holiday, are the ones who cannot get anybody.

So the practical advice is straightforward: if you want your patio done for spring, book it in February.

You will get a choice of dates. You will get somebody who is not rushing to fit you between two other jobs. And you will have the patio ready before the weather is good enough to sit on it, which is the point.

The best time for the result

For cleaning alone, almost any time works. It is wet work and rain during a wash makes no difference at all. I clean through the winter.

Two things do change with the season.

Drying time before re-sanding. Kiln-dried sand will not run into a damp joint. Between May and September a drive is often dry enough the same afternoon. Between November and March it usually means a return visit the next dry day. That is planned and included, but it does mean a winter job takes two visits.

Sealing. This genuinely does have a season. Sealer needs the surface dry all the way through, which is two or three dry days after a wash, and it needs around eight hours without rain after application. In practice that means April to September in this country, with May and June the most reliable.

So: clean whenever, seal in late spring or summer.

Autumn is underrated

There is a good argument for cleaning in October or early November that almost nobody acts on.

Algae growth largely stops over winter, so a patio cleaned in autumn stays looking reasonable through to spring. Leaf fall is finished, so you are not cleaning and then having the trees empty onto it a fortnight later. And you get a safe, non-slippery surface for exactly the months when the surface is wet and the light is poor, which is when people actually slip.

The counter-argument is that you clean it, then do not look at it again until March. Which is fair enough.

The specific Sussex version

A few things are local rather than general.

Coastal salt keeps surfaces damp for more of the year here than inland, so the growing season for algae is effectively longer. The winter lull in growth is less pronounced at Seaford or Peacehaven than at Uckfield.

The Weald towns north of the downs get colder and stay wetter, so drying times are longer and the winter two-visit pattern is more or less guaranteed from October.

Spring comes early on the coastal strip. The first genuinely dry settled spell here is often the last week of March, which is when sealing becomes possible.

What I would do

If your patio needs cleaning and you have no other constraint: book it now, whatever month you are reading this in. It is easier to get a slot in the quiet half of the year and the result is identical.

If you want it looking right for summer: February, without question.

If you want it sealed as well: clean in April, seal in May. That gives the surface time to dry properly between the two and puts the sealing in the most reliable weather window of the year.

If you have left it until the first hot weekend in May: ring anyway, but be prepared to wait, and consider whether you actually mind having it done in June.

One thing not to do

Do not have a patio cleaned in a hard frost. Water on the surface freezes, and on porous stone that already holds moisture, the expansion can push flakes off the face. It is the one weather condition where I will refuse the work.

Below about three degrees I would rather move you than risk the paving, and I say so when I book winter jobs.

Booking, month by month

January. The quietest month of the year for this trade. You will get a slot within a week and your pick of dates. Cleaning results are identical to July. Winter jobs are two visits because of drying times.

February. The month to book if you want it done for spring. Demand starts climbing hard from about the middle of the month and this is the last point at which you can choose your date rather than take what is offered.

March. Diaries start filling. Two to three weeks out is typical by the end of the month. The first sealing weather usually arrives in the last week.

April. Busy. Three to four weeks out. Good conditions for both cleaning and, by the end of the month, sealing.

May. The busiest month. Four to six weeks out is common. Ironically the best sealing weather of the year, which is why sealing is worth booking alongside a spring clean rather than as an afterthought.

June to August. Still busy but easing. Excellent drying, so most jobs are single visits. Very hot weather is actually unhelpful for sealing because the solvent flashes off too fast.

September and October. The gutter season starts and patio work drops away. Good availability, good conditions, and a clean now lasts visually through to spring.

November and December. Quiet. Two-visit jobs. The best time for a bargain and the worst time to want it looking nice for a party.

The frost rule

The one weather condition where I will refuse to work.

Below about three degrees, water on a porous surface can freeze in the pores. Water expands by roughly 9% as it turns to ice, and that expansion inside a pore pushes the surface off in thin flakes.

On dense concrete or porcelain it is not really a risk. On soft sandstone, older concrete or brick, it is a real one.

So if you have a January booking and a cold snap arrives, I will move you. It is not me being awkward about working in the cold. It is that I would be doing measurable damage to your patio.

What the seasonality means for the trade

Worth saying because it explains a lot of behaviour you might otherwise find odd.

Four months of the year carry most of the income. That is why quotes get slower in May, why some firms will not take small jobs in spring, and why the pushiest selling happens in the peak.

It is also why booking in the quiet half of the year gets you a more attentive job. In January I have time to do the edges properly and come back to sand. In May everybody in this trade is working against the clock.