Practical Guide

Can Power Washing Bring an Old Patio Back to Life in Keynsham?

Often, and more than people expect. But washing shows you the patio you have — it does not repair it.

Updated 1 September 2026 Power Washing · Keynsham

The Short Answer

Yes, frequently — old patios often come up far better than owners expect, sometimes several shades lighter. Algae, moss, black spot and general grime all clean off well.

What washing cannot do is repair. Cracks, spalling, loose or sunken slabs and failed pointing are revealed by cleaning, not caused by it or cured by it.

What Cleaning Genuinely Fixes

What It Reveals

RevealedWhat it means
Cracked slabsWere already cracked; now visible
Spalling or flaking concreteFrost damage over years
Loose or rocking slabsFailed bedding — a repair, not a clean
Sunken areasSettlement or washed-out sub-base
Failed pointingNeeds repointing
Colour variationReplaced slabs from earlier repairs
Wear on the surfaceCommon on soft stone cleaned repeatedly
Washing reveals damage; it does not create it. This is worth saying plainly because a patio that looks acceptable under green film and looks poor when clean has not been damaged by the cleaning — it was always in that condition, and the growth was hiding it. Knowing the truth is useful, even when it is unwelcome.

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Beyond Cleaning

When Replacement Is the Honest Answer

Clean it first, then decide. A patio you were ready to replace is quite often a patio you were ready to clean.

The Sensible Order

If you are unsure whether an old patio is worth keeping, clean it first. It is the cheapest possible way to find out, it costs a fraction of replacement, and it settles the question with evidence rather than guesswork. If it comes up well, you have saved a great deal. If it comes up poorly, you now know what you are dealing with and can plan a replacement properly — and the cleaning was not wasted, because you needed to see the surface to price the work anyway.

Keeping It That Way

Power Washing in Keynsham

See what our power washing service covers in Keynsham, or read more about the service across the areas we work in.

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FAQs

Reviving an Old Patio in Keynsham — FAQs

Can power washing bring an old patio back to life?

Often, and more than people expect. Algae, moss, black spot and grime all clean off well, and patios frequently come up several shades lighter.

Will it fix cracked or loose slabs?

No. Washing reveals cracks, spalling, loose slabs and failed pointing — it does not cause them and cannot repair them.

Did the pressure washing damage my patio?

If damage appears after cleaning it was almost always there beforehand, hidden under growth. Over-washing soft stone repeatedly can wear it, which is a separate issue.

When should a patio be replaced instead?

Widespread cracking, significant settlement, multiple rocking slabs, falls running towards the house, or a patio sitting above damp proof course level.

Should I clean it before deciding?

Yes. It costs a fraction of replacement and settles the question with evidence — and you need to see the surface to price a replacement anyway.

Can broken slabs be replaced individually?

Yes, though matching old stone is rarely perfect and the replacement usually shows for a while.

Will sealing help?

On porous stone it slows re-soiling and helps colour, but it needs a fully dry surface and reapplying every few years.

How do I keep it looking good?

Sweep autumn leaves off, cut back overhanging growth, clear gutters, fix standing water, and avoid over-washing soft surfaces.

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