A mossy paved driveway is not just a cosmetic issue. The damp green layer makes the surface slippery, traps moisture against the stone, and the problem compounds every year — the longer you wait, the more expensive the cleaning. The good news: a properly done wash and a few preventive steps keep the surface in shape for years.
Why does moss appear at all?
Moss loves shade and moisture. You will find it mostly on the north side of the house, under trees and wherever water sits. When soil and decomposed leaves build up in the joints, moss gets a growing bed — which is why sweeping leaves off the pavement in autumn is also moss prevention. Weeds arrive the same way: wind-blown seed germinates in a joint full of organic matter.
Pressure washing done right
The most common mistake is aiming a powerful jet straight into the joints at close range. Along with the moss, the jointing sand that supports the stones is blasted out — pavers start to sink and rock, and moss grows back even faster in the empty joint. The correct technique is a wider nozzle, moderate pressure and enough distance from the surface, moving at a steady pace in one direction. On heavily mossed surfaces, a moss treatment follows the wash to kill the spores and roots, not just the visible green layer.
Resanding: the step everyone forgets
After washing and once the surface has dried, the joints must be refilled with dry sand. A filled joint holds the stones in place and leaves less room for moss and weeds. This is the step that usually gets skipped in DIY cleaning — the yard looks great for a month, but next season the problem is worse than before.
When and how often to wash?
The best window runs from spring to autumn, when the stone is dry and night frosts cannot damage a freshly washed surface. A paved area maintained once a year stays clean with little effort; one left unwashed for years needs several rounds of work. In winter, clear snow and ice mechanically — shovel and brush — and avoid salt, which breaks down the surface of concrete pavers. If you want the whole cycle — washing, moss treatment and resanding — done correctly in one visit, ask us for a quote.
Related services
Paver cleaning
We clear debris, pressure wash the pavers, use hot water for roots if needed, repair sunken or raised areas, and refill the joints with sand.
Deck washing & oiling
We assess the deck condition, wash the surface with wood-safe pressure, let it dry, and oil it with a suitable product to protect the timber.
