What are the effects of cracks or unevenness in the paving ?
Cracks are a source of dampness coming up from underneath and frequently act as channels for rainwater. Unless they are sealed completely, laying of the strips should not continue in that vicinity in order to avoid increased possibilities of their becoming detached in the future. The same thing happens with very uneven surfaces: then, in addition to the problems with water, there is some difficulty in making the material fit, and this can cause rips.