Adding Softwashing to Your Exterior Cleaning Business

Mark Cave

Picture this. You're on a customer's drive, finishing a window clean that's going to earn you somewhere between twenty and forty pounds. You glance up at the gable wall. The render is green on the north side, there's black streaking on the fascia, and the roof slope is starting to hold moss. The homeowner hasn't noticed any of it. You have. That moment is what today's episode is about.

Mark Cave

I'm Mark Cave from SoftWash UK, and this one is for window cleaners, pressure washing contractors and anyone in exterior property maintenance who's thinking about adding softwashing to a business that already works. I'll show you what you've already got going for you, where people waste money, and how to do it without becoming a splash and dash operator.

Mark Cave

Let's start with the window cleaners, because you're sitting on something most new softwashers would pay a fortune for. You have a customer base you visit every four to eight weeks. They trust you. They already let you onto the property. And you do a visual survey of the exterior every time you turn up, whether you call it that or not.

Mark Cave

You're the one who sees the green and red algae creeping across K Rend before the homeowner does. That's Trentepohlia, if you want the proper name. You see the black staining on the fascias and soffits. You see the moss building on the roof. Nobody has to cold call anybody here. You're having a conversation with a person who already likes you.

Mark Cave

Now the pressure washers. You've got a lot going for you too. You've got site discipline, a van layout that works, water sourcing sorted, and hard surface clients. But you also keep running into the ceiling of what high pressure can do. Black spot lichen embedded in sandstone that just won't shift. Or modern building fabrics that you're nervous about blasting. Softwashing answers both of those problems.

Mark Cave

And here's why it matters commercially. A routine window clean is twenty to forty pounds a visit. Softwashing a rendered gable wall, treating a stained patio with a chemical bio treatment, or applying a roof moss biocide can command anywhere from three hundred to twelve hundred pounds or more. On the same property. For the same customer who already trusts you.

Mark Cave

So it sounds simple. It isn't, and there are traps on both sides. Window cleaners first. The temptation is to run sodium hypochlorite or a biocide through the pure water system you already own. Please don't. Bleach destroys the resin in your deionisation vessel. It degrades the standard polyurethane pole hose. It corrodes brass quick connect fittings. You'll ruin the kit that earns your living today.

Mark Cave

The rule is to keep pure water and chemical completely separate. Dedicated chemical rated hoses, PVC or polyurethane. Viton or Santoprene seals. And a purpose built water fed pole softwash nozzle rather than improvising with whatever's in the van. Two systems, never crossed over.

Mark Cave

Pressure washer folk, you've got a different myth to drop. I hear it all the time. Softwashing is just turning down the unloader, or fitting a black soap nozzle. It isn't. A high pressure pump doesn't give you controlled chemical concentration, the right droplet size, or proper dwell time. That narrow atomised spray makes airborne mist and drift. What you want is heavy, clinging droplets that stay put and do the work.

Mark Cave

And the damage side is real. High pressure can strip the protective coating from concrete tiles. On monocouche or silicone EWI render it can cause scarring you can't undo, and water getting in behind the finish. That's a bad phone call to take.

Mark Cave

Next, pricing. Don't price softwashing like window cleaning, by the hour. And don't price it like commodity jet washing, a flat rate per square metre. You're charging for chemistry, dilution calculations, monitoring dwell, pre wetting and rinsing, site risk and compliance overheads. Charge like a labourer while carrying a specialist's responsibility, and you'll be busy and skint.

Mark Cave

The other big win is your calendar. Window cleaning and pressure washing can go very quiet in winter. Softwashing smooths that out. Spring and summer suit render and roof cleans where people want an instant visual result. Autumn and winter suit biocide treatments, DDAC based, on mossy roofs, tarmac and slippery patios where rain and low light feed algae. Then turn one off cleans into annual maintenance treatments, with something like Soft Wash Pro 50, and you've got predictable repeat income.

Mark Cave

Now the part that catches people out. Insurance. Your window cleaning or pressure washing policy may well exclude chemical application. Often it won't cover treatment risk, which is damage to the surface you're actually working on. Pollution cover and work at height can be excluded too. Ring your broker, tell them exactly what you're adding, and get it endorsed in writing. Don't assume.

Mark Cave

On the legal side, sodium hypochlorite is perfectly legal for exterior cleaning in the UK when it's used responsibly. That means COSHH, safety data sheets, and site specific RAMS. On site, that means soaking plant root zones before and after, exclusion zones for children and pets, and keeping runoff out of open storm drains.

Mark Cave

Here's the thread through all of this. Equipment without chemistry and surface knowledge is a liability. Learn first, then buy kit. Plenty of people do it the other way round and spend months fixing it.

Mark Cave

Podcasts like this are a great start, but if you want to offer softwashing properly, the SoftWash UK CPD Certified Softwash Training Course goes much deeper. It's online, so you learn at your own pace. It covers surface identification, chemical selection, dilution maths, safe delivery and quoting. Completing it also opens the way to becoming an Approved Softwash Applicator, with a listing in the Approved Contractor Directory and a place in the National Association of Softwash community. And eligible CITB registered employers can access grant funding under Building Repair and Maintenance. Everything's at softwashing.uk.

Mark Cave

So here's your challenge before the next round. Pick three customers and look properly at their exteriors. Note the render, the roof, the patio. Then work out what that same visit could be worth if you could treat it safely. Then ask yourself honestly whether you'd know what to do. If the answer's not yet, that's your next step. Until next time, stay safe and keep cleaning smarter.