When to Jet Wash a Patio

Jet washing can refresh paving, but too much pressure can damage joints or delicate surfaces. Check the condition of your patio before cleaning.

A pressure washer can make a big difference to dirty paving, especially where algae and everyday grime have built up. But jet washing is not the right answer for every patio, and using too much pressure can damage slabs and joints.

When is the best time to jet wash?

A mild, frost-free day in spring or early autumn is often convenient. Avoid periods when runoff could freeze, and allow time for the patio to dry afterwards. There is no universal rule that every patio needs pressure washing once a year; clean it when its condition calls for it.

Check the surface and pointing first

Before using a pressure washer, look for loose slabs, damaged pointing, flaking coatings and soft or delicate surfaces. Follow the paving manufacturer's cleaning advice. Some natural stone, older joints and decorative finishes are better cleaned with a softer brush and a suitable product.

If you do use a pressure washer, choose an appropriate setting and nozzle, keep the jet moving and test an inconspicuous area first. Keep the spray away from people, pets, electrical fittings, windows and vulnerable joints.

What about weeds between patio slabs?

Pressure washing may remove surface debris, but it will not repair missing pointing. Pull or clear weeds carefully and assess the joints. Where material has failed, repointing the patio may be more useful than repeated pressure washing.

Do you need patio sealer or weedkiller?

Not necessarily. Some paving benefits from a compatible sealer, while other surfaces are best left untreated. Read the paving and product instructions, including drying time and weather requirements. Avoid treating weedkiller as a routine follow-up to every clean.

Can jet washing remove paint or mould?

High pressure can damage or strip coatings. Never use a pressure washer to remove suspected lead-based paint: disturbing it can create hazardous contamination. If dark growth keeps returning, look at shade, drainage and moisture rather than relying on repeated harsh cleaning.

Need help with your patio?

HandyExperts can discuss outdoor maintenance and practical handyman work. Tell us about the paving type and condition so we can advise on the appropriate next step. Call 0330 912 2323 for prices and availability.