Why paths get slippery in the wet
A green film on a shaded path turns slick after rain. What causes it, where it grows around the house, and how to get rid of it before someone slips.
A path can look fine in the dry and turn slick after rain. The cause is usually algae. It's a thin green or black film that grows where paving stays damp and shaded.
It turns up in the same places at most houses. The side passage. Steps on the south side. The pool surround. The path under a big tree. Anywhere that doesn't dry out between showers.
Moss in the joints is a sign too. So is a dark patch that never quite goes away.
Sweeping won't shift algae, because it has grown into the surface. Plain concrete and pavers can take a proper clean with pressure. We run it through a spinning surface cleaner, so the finish is even, and lift moss and weeds out of the joints.
Some paving needs a lighter touch. Sandstone is soft and wears under too much pressure. Older pavers lose the sand between them if the jet is too strong.
Once it's clean, more light and air slow the algae down. Trim plants back from the path. Keep leaves swept off. Fix any tap that drips onto the paving.
If there are kids running in and out, or anyone unsteady on their feet, don't wait for a fall. Get a free quote and we'll clean it before the next wet spell.