You would be surprised how many Dublin homeowners assume their old patio needs replacing when all it actually needs is a thorough clean and restoration. That dark, moss-covered, stained surface you have been looking at for years? Underneath it is often perfectly sound paving that can look close to new with the right treatment. Professional patio cleaning and restoration costs a fraction of a full replacement — typically 15–25% of the cost of new paving — and can transform your outdoor space in a single day.
At Lion Paving & Landscaping, we offer professional patio cleaning and restoration across Dublin as both a standalone service and as part of larger garden renovation projects. This guide covers what is involved, when cleaning is enough, and when replacement is the better option.
Signs Your Dublin Patio Needs Cleaning or Restoration
Green or black algae covering the surface (the number one issue in Dublin’s damp climate). Moss growing in joints and across slab surfaces. Staining from organic matter — leaves, berries, bird droppings. Pointing (the mortar between slabs) cracking, crumbling, or washing out. Slabs rocking or uneven due to settling or sub-base movement. Efflorescence — white salt deposits on the surface of stone or concrete. And an overall dull, lifeless appearance where the original stone colour is hidden under years of grime.
Step-by-Step Patio Cleaning for Dublin Homeowners
Step 1: Clear and Sweep
Remove all furniture, pots, and debris. Sweep the entire surface thoroughly. Pull out any weeds growing from joints by hand or treat with a systemic weedkiller 7–10 days before cleaning.
Step 2: Apply Patio Cleaner
Apply a specialist patio cleaner suited to your material. For natural stone (sandstone, limestone), use a pH-neutral stone cleaner — never acidic products that damage the surface. For concrete slabs and cobblelock, a general patio cleaner or dilute bleach solution works well. For porcelain, warm water and mild detergent are usually sufficient. Leave the cleaner for the recommended time (typically 15–30 minutes) to break down organic growth.
Step 3: Pressure Wash
Use a pressure washer with a fan nozzle (not a pencil jet, which can erode stone and blast out jointing sand). Work methodically across the patio in overlapping passes. Keep the nozzle 15–20cm from the surface. For natural stone, use a lower pressure setting (100–120 bar) to avoid surface damage. For concrete and porcelain, higher pressure (120–150 bar) is safe.
Step 4: Repoint the Joints
After cleaning, inspect all joints. If the pointing is cracked, crumbling, or missing, repoint with a suitable product. For natural stone, use a flexible jointing compound designed for stone patios. For concrete slabs, brush kiln-dried sand into the joints and compact. For cobblelock, sweep kiln-dried sand across the surface and vibrate it in with a plate compactor.
Step 5: Seal (If Appropriate)
Indian sandstone, limestone, and concrete slabs benefit from an impregnating sealer applied after cleaning and repointing. This reduces future staining, slows algae regrowth, and makes future cleaning easier. Porcelain and granite do not need sealing. Allow the patio to dry fully (48–72 hours of dry weather) before applying sealer.
For professional patio cleaning in Dublin, see our patio cleaning and repair service. We also offer professional driveway cleaning.
Want Your Patio Cleaned Professionally?
Our patio cleaning service includes pressure washing, moss and algae treatment, repointing, and optional sealing. Most patios are completed in a single day. Free quotes across Dublin.
Call us today: +353 85 778 0394
Or request a free quote on our contact page.
When to Restore vs When to Replace Your Patio
| Condition | Recommendation | Typical Cost (20m²) |
| Surface dirty but slabs sound and level | Clean and seal — restoration | €200–€500 |
| Joints cracked but slabs intact | Clean, repoint, and seal | €400–€800 |
| A few slabs cracked or rocking | Repair — lift and relay affected slabs | €300–€600 |
| Widespread sinking, movement, or cracking | Replace — sub-base has failed | €1,400–€3,000 (new patio) |
| Outdated material or design | Replace — no amount of cleaning fixes aesthetics | €1,400–€3,000 (new patio) |
Frequently Asked Questions
Q: How much does patio cleaning cost in Dublin?
Professional patio cleaning in Dublin costs €100–€300 for an average 20–30m² patio. This includes pressure washing and moss treatment. Add €100–€200 for repointing and €150–€300 for sealing if needed.
Q: How often should I clean my patio in Dublin?
An annual clean in spring or early summer is ideal for most Dublin patios. Properties in shaded, damp areas may benefit from twice-yearly cleaning. Regular sweeping to remove organic debris between cleans slows algae and moss regrowth.
Q: Can pressure washing damage my patio?
Yes, if done incorrectly. A pencil jet nozzle at high pressure can erode natural stone, blast out jointing sand, and damage surfaces. Always use a fan nozzle, appropriate pressure for the material, and maintain a safe distance from the surface.
Q: Does sealing a patio prevent moss and algae?
Sealing significantly reduces moss and algae growth by preventing moisture absorption. It does not eliminate growth entirely — organic matter on the surface can still support some algae. But sealed patios stay cleaner for longer and are much easier to maintain.
Q: Should I replace my old patio or just clean it?
If the slabs are structurally sound, level, and the sub-base is intact, cleaning and restoration is almost always the better value option. Replace only if the paving is damaged beyond repair, the sub-base has failed, or you want a different material or design.
Restore Your Dublin Patio Today
Explore our patio cleaning and repair services or contact us for a free assessment.
Call us: +353 85 778 0394
Email: sales@lionpavingandlandscaping.ie
Online: Request a Free Quote
Visit us: Get Directions
Lion Paving & Landscaping
259 Birches Rd, Wedgwood, Dublin 16, D16Y5E5
Serving North Dublin, South Dublin, Kildare & Surrounding Areas
