Yorkstone is a forgiving material. It has been weathering on British buildings for around two hundred years and looks better for it. Most of the time, the best thing you can do for a Yorkstone patio is leave it alone. But occasionally — after a barbecue accident, a wet autumn, or a tree dropping berries all over the back terrace — some practical care is in order. Here's what works and what doesn't.

When to clean (and when not to)

Yorkstone develops a surface patina over its first few years — slight darkening, the first appearance of moss in the joints, a gentle softening of the colour. This is the stone settling into its setting. Scrubbing it off resets the clock and the patio looks raw again.

Clean when there's a real reason: a stain that won't lift naturally, moss colonising a high-traffic walkway, algae making the surface slippery in wet weather, or the patio just looking neglected before a garden event. Don't clean simply because the slabs look slightly different from how they did the day they arrived. That's the stone telling you it's outdoors.

Tools and materials

  • Stiff-bristled brush (natural fibre rather than wire — wire scratches the surface)
  • Buckets of warm water and a pH-neutral stone cleaner (no household detergents)
  • Hose pipe with a wide-spray fitting (or a low-pressure washer kept at distance)
  • Plastic spatula for thick deposits
  • Masking tape and plastic sheeting to protect adjacent borders and brickwork

What to avoid: bleach (eats the cement in the pointing); concentrated acid cleaners (etches the stone); pressure washers at close range (blasts the pointing out of the joints). Yorkstone responds to gentle, repeated cleaning far better than to one aggressive blast.

Step-by-step general clean

Choose a dry day, ideally with a clear forecast for the next 48 hours.

  1. Sweep the patio thoroughly — leaves, twigs, accumulated grit.
  2. Spray the entire surface with clean water from a hose. Don't skip this — it lifts surface debris and prepares the stone to absorb cleaning solution.
  3. Mix pH-neutral stone cleaner per the manufacturer's dilution. Apply with a watering can or pump sprayer across the whole patio.
  4. Let it dwell for 10–15 minutes. Don't let it dry out — re-wet with more solution if needed.
  5. Scrub firmly with the stiff-bristled brush, working in small sections.
  6. Rinse thoroughly with clean water. Twice if you've used a particularly active cleaner.
  7. Let the patio dry completely before walking on it heavily.

Removing specific stains

Oil and grease. Fresh spills: blot with kitchen paper, then sprinkle dry sand or cat litter to absorb the residue. Leave overnight, sweep up. For older oil stains: a poultice of bicarbonate of soda and water, applied thick, left for 24 hours under plastic sheeting, then scrubbed off. Repeat if needed — Yorkstone is porous and deep oil stains may need two or three rounds.

Rust. Usually from garden furniture left out over winter. A pH-neutral rust remover formulated for natural stone works; oxalic acid in a dilute solution is the older-school option. Don't use hydrochloric acid — it dissolves the calcite in the stone.

Moss and algae. A 50:50 solution of white vinegar and water, sprayed and left for two hours, kills most green growth. Rinse thoroughly. For deep-rooted moss in the joints, brush it out manually first, then treat. The proper preventative is improving drainage and airflow — moss colonises wet, shaded patios most aggressively.

Wine and food stains. Bicarbonate poultice as for oil. Treat fresh stains within an hour where possible — the longer they sit, the deeper they penetrate.

Mortar smears from installation. If caught fresh, a pH-neutral cement remover lifts them in an hour. If cured for more than a few weeks, you'll need a stronger acid-based product — and the stone underneath will need re-sealing afterward. The far better approach is to mask the slab face during pointing in the first place.

To seal or not to seal

Honestly, most Yorkstone patios don't need sealing. The stone has lasted hundreds of years in British weather without help. Sealing is worthwhile in three specific cases:

  • Under a barbecue or outdoor kitchen, where oil drips are routine.
  • Near deciduous trees that drop berries or sap on the patio every autumn.
  • On indoor Yorkstone flooring, where stains from food and drink are inevitable.

For everywhere else, sealing is optional — and a poorly-chosen sealant can cause more problems than it solves.

Choosing a sealant

Two important rules:

Breathable, always. Natural stone needs to allow moisture vapour to pass through it. Acrylic sealants form a non-breathable film on top — water gets trapped underneath and produces a white bloom inside one or two summers. Always use a penetrating, breathable natural-stone sealant. Read the bottle: the words "breathable" and "natural stone" should both appear.

Test on a sample first. Sealants slightly darken the colour of the stone. The "wet look" some sealants produce can be lovely on a contemporary patio and wrong on a heritage one. Test a small section in an unobtrusive area, let it cure for 48 hours, decide if you like it before committing to the whole patio.

Solvent-based penetrating sealants last longer (3–5 years) but are stronger-smelling. Water-based ones are easier to apply but need re-doing more often (2–3 years). Both are widely available; ask any natural-stone supplier for a current recommendation rather than buying generic patio sealer from a hardware shop.

Applying sealant

Wait six weeks after laying before sealing — the bedding mortar needs to fully cure first. Choose a dry, warm day with no rain forecast for 48 hours.

  1. Clean the patio thoroughly (above section). Let it dry completely.
  2. Mask off any adjacent surfaces — wooden decking, brickwork, lawn edging.
  3. Apply the sealant with a paint roller or pump sprayer per manufacturer instructions. Most products want one or two thin coats rather than one thick one.
  4. Wipe off any pooling excess with a clean cloth as you go. Excess sealant on the surface will dry to a sticky film.
  5. Allow full cure time — typically 24–48 hours — before heavy use.

Long-term maintenance

A well-laid Yorkstone patio asks for very little. An annual sweep and rinse in spring keeps it looking cared-for. A deeper clean every three to five years deals with accumulated patina if you want to refresh it. Replace any cracked slabs as you find them — keeping a few spares from the original pallet is the easiest way to colour-match later.

If you're starting from scratch on a new patio installation, our companion guide on how to lay Yorkstone paving covers the steps that prevent most cleaning headaches in the first place. And if you're choosing the stone before laying, see the cost guide and the reclaimed vs new comparison.

Talk to our stoneyard team