DIY vs professional house washing: mistakes to avoid and when to call

Washing your house may look simple, but not all methods are safe. Done wrong, it can damage paint, let water into walls, or leave streaks. Knowing the pros and cons of DIY vs professional cleaning helps you make the right choice for your Melbourne home.

DIY house washing

Many homeowners try to clean walls and decks themselves. It can work for small areas, but it comes with limits.

Pros:

• Low cost if you already own a pressure washer

• Good for small jobs like paths or fences

• You can do it on your own time

Cons:

• Home machines often lack the power for deep cleaning

• Too much pressure can strip paint, chip render or damage timber

• Risk of spraying water into eaves or window seals

• Harder to reach upper walls and roofs safely

• Store-bought cleaners may not fully kill mould or algae

Professional house washing

A professional uses commercial equipment and safe cleaning solutions. They also know how to adjust methods for each surface.

Pros:

• Soft washing protects paint and render

• Surfaces are cleaned faster and more evenly

• Stubborn mould and stains are treated properly

• Safer for roofs, upper levels and hard-to-reach areas

• Longer-lasting results

Cons:

• Higher upfront cost

• Requires booking a service time

Common DIY mistakes

• Using too much pressure on painted walls

• Spraying upwards into gaps and vents

• Forgetting to cover power points and lights

• Skipping pre-treatment for stains

• Not rinsing plants or nearby windows

When to call a pro

• Large homes or multi-storey properties

• Stains that return soon after cleaning

• Visible mould or algae on paint or timber

• Preparing to sell, paint or rent

• If safety is a concern

Extra tips

• Always start with the lowest pressure if you try DIY.

• Wear goggles and closed shoes when spraying.

• Keep pets and kids indoors until surfaces dry.

• Trim plants away from walls before the clean.

DIY is fine for small jobs, but for full house washing it is safest to book a professional clean. You will save time, protect your paint and get longer-lasting results.