Whether it's your first time using a pressure washer to clean your patio or you are a seasoned exterior cleaner, this ultimate guide to pressure washing a patio will walk you through the process step-by-step, address frequently asked questions, and share our top tips for sparkling results!
Why should you pressure wash your patio?
When spring rolls around, we tend to find our patios have accumulated a less-than-attractive layer of grime composed of dirt, grease, pollutants, algae, lichen, moss and mulched leaves. Aside from being unsightly, grime and algae build-up can cause patios to become dangerously slippy. The easiest way to quickly rejuvenate a neglected post-winter patio is with a pressure washer. Pressure washing is not only a time-saving cleaning solution, but it is also highly effective in removing stubborn, hard-to-clean stains and black spots. A thorough pressure wash can bring even the grimiest of patios back to life!
Preparation: Equipment and Materials
Choosing a Pressure Washer
When choosing the most suitable pressure washer for your patio, consider water pressure (measured in bars or PSI). A medium-strength pressure washer (110–130 bars) is suitable for cleaning light debris or delicate patio tiles. A heavy-duty pressure washer (130–150 bars) is recommended for regular patio tiles, especially for removing stubborn black spots or thick grime build-up.
A compact, lightweight domestic pressure washer such as the V3 240 V-TUF jet wash (maximum pressure 150 bars) is ideal for homeowners with limited space. For professional use or larger commercial patio spaces, the V-TUF RAPID SSC All-Stainless Industrial Mobile Pressure Washer is a superb option.
Pressure Washer Nozzles
There are five universally colour-coded pressure washer nozzles: red (0°), yellow (15°), green (25°), white (40°) and black (60°). To avoid streaks when cleaning a patio, we recommend starting with a green (25°) nozzle, and using the Turbo Nozzle for difficult-to-tackle thick or stubborn grime.
Surface Cleaner Attachments
The V-TUF patio cleaner attachment with deep-clean jets uses rotating jets to distribute high-pressure sprays evenly across the patio surface, minimising damage to patio slabs. For heavier commercial use, the larger V-TUF Surface Cleaner features a larger disc size supported by heavy-duty, easy-glide castor wheels.
Detergents
V-TUF's D-Green Garden Surface Cleaner has been formulated for safe and effective use on garden surfaces including patios. It removes moss and algae on contact with no scrubbing required, and can prevent regrowth for up to 6 months after treatment. A foam cannon attachment can help evenly disperse detergent over a large surface area.
Safety Equipment
Always wear goggles, ear muffs and heavy-duty waterproof gloves when operating a pressure washer.
Step 1: Preparing a Patio for Pressure Washing
- Clear obstructions: Remove all furniture, belongings, and potted plants.
- Remove weeds: Properly remove any weeds along with their roots before pressure washing.
- Remove loose debris: Check for and remove any loose or chipped pieces of patio slabs, then sweep thoroughly.
Step 2: Setting Up Your Pressure Washer
Connect to the water supply and press down on the gun lever to check water is flowing freely before turning on the power. Be aware there can be a powerful initial burst of water when first switching on. Always keep the water jet directed away from the pressure washer itself and any electrical mains.
Step 3: Pre-Treatment and Rinsing
Apply detergent to the patio using the low-pressure black nozzle or foam cannon. Leave to rest for 15–20 minutes. For the initial rinse, use the green nozzle at a 45° angle, working back from the furthest point of the patio with a sweeping motion.
Step 4: Deep Cleaning
Use the patio or surface cleaner attachment for your deep clean. For remaining tough stains, use the V-TUF Turbo Nozzle — avoid grout and chipped tiles as the high-pressure jet can damage these. After deep cleaning, rinse with the wide-angle black nozzle.
Step 5: Patio Preservation and Protection
Apply a layer of V-TUF D-Green using the black nozzle to prevent build-up of moss and algae for up to six months. Once dried, the patio will be safe for children and pets. Clean all furniture and plant pots before returning them to your clean patio to prevent recontamination.
Step 6: Future Patio Upkeep
Regularly de-weed and sweep to prevent grime build-up. Periodically rinse with a low or mid-pressure nozzle. Treat with D-Green twice a year — once in early autumn and once in spring — to prevent algae and moss build-up.
V-TUF Top Tips
Safety
- Always wear goggles, ear muffs and gloves when operating a pressure washer.
- Always point the jet away from yourself, the equipment and electricals.
- Use both hands to hold the pressure washer whenever it is in operation.
Avoid
- Do not start with high-pressure, narrow-angle nozzles (Red, Yellow) — these create harsh streaks and can damage tiles and grout.
- Do not use a rotating turbo nozzle on grout or chipped patio tiles.
Best Practice
- Pre-treat your patio with detergent for an easier and deeper clean.
- Start with a mid-pressure nozzle (green) to avoid streaks.
- Use a sweeping motion while maintaining a consistent distance from the patio for uniform results.
- Use a patio cleaner attachment for more even distribution and to reduce mess and splashing.
- Post-treat the patio with D-Green to get longer-lasting results.
Frequently Asked Questions
What should I put on a patio before a pressure wash? If your patio has a particularly thick build-up of grime or moss, you can use a garden-safe detergent such as V-TUF D-Green to help lift it.
Do you need detergent to pressure wash a patio? You can wash a patio without detergent, though it will speed up the process and help tackle tough stains. Hot water pressure washers are an effective chemical-free alternative for tough grime.
When should I pressure wash my patio? You can pressure wash your patio any time of year. If doing one deep clean annually, spring is the best time, as grime and moss are typically worst following the winter months.
Is it safe to pressure wash a patio? It is safe to pressure wash most patio surfaces. We do not recommend using a power washer on block-paved patios as these are held in place with sand. Always check for chipped tiles and loose grout, and wear appropriate safety gear.
Do I need to seal a patio after pressure washing? Applying V-TUF D-Green as a post-cleaning treatment will give longer-lasting results and slow down future build-up of grime, algae, and moss.
