Pebblecrete & Paving Maintenance Guide
How to keep exposed aggregate and paved surfaces around your home sound, safe and looking their best, and the early signs that a repair is due.
Pebblecrete and paving are hard-wearing surfaces, but like every part of a home around Sydney's St George and Sutherland Shire suburbs, they age. Sun, rain, salt air near the bays and rivers, and the steady push of tree roots all take their toll over the decades. The good news is that with a little routine care, most surfaces last for many years longer than people expect, and small problems caught early are far cheaper to fix than problems left alone.
This guide covers the practical maintenance steps that matter most for residential pebblecrete (also called exposed aggregate) and brick or concrete pavers: keeping surfaces clean, protecting them with sealant, managing drainage, and knowing the difference between normal wear and the first signs of a repair.
Cleaning Pebblecrete the Safe Way
Exposed aggregate collects dirt, moss and leaf stains, particularly in shaded areas that stay damp. A stiff broom, mild detergent and a garden hose will handle most of it. Pressure washers are fine when used with a wide fan nozzle and moderate pressure; a narrow jet aimed close to the surface can cut into the cement between the stones and loosen the aggregate, which is exactly the kind of damage that later needs a patch repair.
In shady spots, moss and algae build up and become slippery underfoot. Regular sweeping is the simplest prevention, because it stops the fine debris moss feeds on from settling into the surface.
Sealing: The Cheapest Protection You Can Buy
A quality clear sealant does two jobs: it keeps moisture and stains out of the surface, and it slows the fading caused by our strong Australian sun. Most residential pebblecrete benefits from resealing every 5 to 10 years, depending on exposure and traffic. Sealed surfaces also shed water more readily, which means less moisture soaking into the base beneath, and that protects more than just the look of the surface.
Keep Paving Joints and Drainage Working
For pavers, the joints are the first line of defence. When jointing sand washes out, pavers begin to rock, and water runs straight into the bedding below, which is how sunken and uneven sections start. Top up joints when you notice gaps, and keep an eye on where water goes during heavy rain. Puddles that sit against the edge of a path or pool in one corner are telling you the fall has been lost, and that is a re-levelling job best done before the bedding softens.
Tree Roots: The Number One Cause of Damage
Across suburbs like Lugarno, Oatley, Bonnet Bay and Engadine, tree roots lift and crack more paths and driveways than anything else. Watch for surfaces that slowly rise along a line, or cracks that widen a little each year. The earlier a root-lifted section is lifted, the base repaired and the surface re-set, the more of the original surface can be saved.
When Maintenance Stops and Repair Starts
Cleaning and sealing can freshen a tired surface, but they cannot fix structural problems. Cracks that move, sections that sink or rock underfoot, aggregate coming loose, or edges breaking away are all signs the surface or its base needs repair, not a wash. Repairs to pebblecrete are usually localised: the failed section is cut out, the base corrected, and fresh aggregate matched to blend with the surrounding surface. For paving, lifting and re-bedding the affected area is normally enough, without redoing the whole job.
If you are unsure whether your surface needs maintenance or a repair, contact us and describe what you are seeing. We arrange an on-site inspection across St George and the Sutherland Shire and give clear, honest advice about what the surface actually needs.
Maintenance FAQs
How often should pebblecrete be resealed?
Most exposed aggregate pebblecrete benefits from resealing every 5 to 10 years, depending on sun exposure, foot traffic and drainage. A sealant keeps moisture out of the surface and helps the aggregate keep its colour.
Can I pressure wash pebblecrete?
Yes, but use a wide fan nozzle and moderate pressure. Narrow, high-pressure jets can blast the cement paste between the stones and loosen aggregate over time. A gentle wash with a stiff broom and mild detergent is usually enough.
What causes pavers to sink after rain?
Water washing into the joints softens the bedding sand underneath, especially where drainage pools or runs across the surface. Fixing the drainage and re-compacting the bedding before re-laying the pavers stops the problem coming back.
Not Sure Whether It Needs a Repair?
Call and tell us what needs attention and your suburb. We'll arrange a site inspection, look at the actual repair required and give you a clear quote on site.