Should You DIY?
Should you pick up the lance, and smash out the pressure washing work yourself?
9/10 quotes we attend, somewhere during the conversation include "yeah, I've got a Gerni - I was going to do it myself..."
It's as though people feel the need to justify the fact they've chosen to enlist some professional help. You could probably do a lot of things, but should you? Let's explore that.
Professional, or DIY?
Pressure cleaning your driveway, roof, or exterior surfaces seems like a rewarding DIY project, but is it the right move? Let’s break down when it might make sense, when it might not, and what to watch out for.
If you already own the equipment or can rent it affordably, DIY can be cheaper than hiring a professional. You can work on your own schedule, tackling small sections when you have time. You’ll have complete control over which areas you clean and the methods you use.
Professional equipment is more powerful and precise. Inexperienced handling can lead to damage, blasted paint, etched concrete, or water intrusion. Pressure cleaning isn’t just about pulling a trigger, it requires preparation, safety measures, and careful cleanup. It’s physically demanding, especially for larger jobs.
​
Ladders, slippery surfaces, and high-pressure water can lead to accidents. Professionals are trained in safe methods.
A small patio or driveway might be manageable. If you’ve done it before and understand the risks and techniques it might be a consideration. Cleaning a concrete driveway is less risky than a roof or a delicate siding.
When DIY Isn’t Advisable
Most roof cleaning jobs should be left to somebody with the correct experience, equipment, and insurances. Roofs are hazardous, and improper technique can damage roofing materials. Large commercial spaces or multi-level homes need specialised equipment and techniques. If you're thinking about tackling a large surface area with a lance, reconsider it. Surface cleaner attachments are the only way to go. Painted, delicate, or historic surfaces require expertise and specific equipment or chemicals to avoid damage.
What to Watch Out For
You need to consider the water runoff. You’ll need to manage it to avoid environmental damage or legal issues. If using detergents or bleach, know your local regulations and how to apply and neutralise them safely. Achieving an even finish without streaks or missed spots is also trickier than it looks. It requires overlapping passes with the surface cleaner, careful work with the lance, and a lot of the time post-treatment with chemicals.
Pro advantage
Professionals use commercial-grade equipment that provides a deeper clean and greater precision.
Experience and Safety: They know how to adjust pressure, use appropriate chemicals, and handle tricky surfaces safely.
​
What might take you a weekend, a team can often finish in a few hours. Professionals can apply post-treatments to prevent mold regrowth or protect surfaces.
DIY vs. Professional cost
DIY - You might spend $100–$300 on rentals, plus detergents and protective gear.
Professional - Depending on property size and complexity, professional services can range from a few hundred dollars to a few thousand.​
Conclusion
If you have a small, simple area and feel confident in your skills, DIY could be worth it. However, be sure to consider the risks and whether you're comfortable with them. Never risk personal safety.