Pressure Washers: Quick How‑To and Handy Tips

If you’ve ever watched a pressure washer blast away grime, you know it looks easy. In reality, getting the best results takes a few simple steps. This guide breaks down the most common questions: how long a house wash should take, whether it can really kill mold, and what to think about before turning the hobby into a business.

How Long Does a House Pressure Wash Take?

On average, a two‑storey home needs about 2‑3 hours for a full exterior clean. The clock ticks faster if you:

• Use a washer with 2,500–3,000 psi and 2–3 gpm – enough power without blowing paint off.
• Prep the surface first – rinse off loose dirt, close windows, and cover plants.
• Work in sections – start at the roof, then walls, and finish with the driveway.

If you’re a DIYer with a smaller machine (1,500 psi), add an extra hour or two. Pro cleaners often finish faster because they have ladders, extension wands, and experience recognizing stubborn spots.

Can Pressure Washing Really Remove Mold?

Yes, a good pressure wash can knock mold off most hard surfaces. The trick is to use the right pressure and a cleaning solution. Spray a mix of water and a mild detergent, let it sit for 5‑10 minutes, then blast with 2,800 psi at a 20‑degree angle. This loosens the spores without pushing them deeper into the material.

For porous surfaces like wood siding, stick to a lower pressure (1,200‑1,500 psi) and follow up with a fungicide. Never point the spray directly at windows or fragile trim – the force can crack glass or strip paint.

After the wash, let the area dry completely. If mold returns within a week, the underlying moisture problem (leaky roof, poor ventilation) needs fixing before you spray again.

Thinking about turning this skill into a side hustle? Starting a pressure‑washing business in 2025 has its own set of challenges. The biggest costs are buying a reliable washer, safety gear, and insurance. Expect to spend £2,500‑£4,000 on a decent commercial unit. You’ll also need a vehicle that can carry the equipment and a solid marketing plan – most customers find services online, so a simple website and local SEO help a lot.

Before you launch, check local regulations. Some councils require a licence for high‑pressure water use, especially near waterways. Ignoring it can lead to fines and lost jobs.

In short, pressure washers are a fast, effective way to clean houses, tackle mold, and even start a small business. With the right tools, a bit of prep, and safety in mind, you’ll get great results without wasting time or money.