CD Designs Blog
Block paving can be ruined by unsightly weeds, moss and algae. These three organic nuisances work together to compromise the appearance and structure of block paved paths and driveways. Algae can break down the surface of the stones, and this allows moss to grow as well. Weeds can take seed in the moss and algae and flourish.
Most areas of block paving are installed on top of a weed resistant membrane. Whilst this is effective at stopping weeds growing up from beneath the paving, it can’t stop wind-blown weed seeds from landing and taking root. Weed killer can deal help to deal with the problem, but it may require numerous applications. Weed killer can also have a detrimental effect on the food-chain of insects and birds on and around your property.
Because of the nature of concrete driveways – in that they’re by and large one complete surface, without the amount of cracks and gaps that mosses and weeds exploit in block paving – they’re less affected by mosses and weeds. However, the UK is a damp nation, and exterior surfaces will usually end up being affected by algae or lichens. Indeed, no path or driveway surface will be completely free of them, but it’s easy to keep the problem in check.
For both block paving and concrete, prevention is better than cure. Algae can be removed by regularly cleaning the surface with a brush or power-washer. If you’ve got no objection to using chemical weed-killers, the occasional pre-emptive application should stop them before they’ve really had a chance to get going, but you should check to make sure that the active compound in your weed killer won’t adversely affect your concrete.
24th February 2010