General wear and tear, temperature changes (granted, we see a lot of those in the UK!), and poor installation are all factors that can lead to cracks in your patio, but can you repair patio cracks yourself?
As tempting as it might be, patio cracks are not something you can turn a blind eye to, unfortunately. Not only can they pose a safety risk, but they can also create structural issues and, in some cases, even decrease the value of your house.
