How do I lay rubber tiles over block paving or paving slabs?

Existing block paving and older concrete paving slabs are generally suitable bases for rubber tiles. If the existing surface is stable, level and sound, the tiles can be laid directly over it without adhesive or fixing to the base. Depending on the range, the individual tiles are joined by a jigsaw interlock or plastic connectors. Outdoors, the area needs a fall of 1 to 2 per cent so that rainwater can run beneath the covering towards an open edge or drainage outlet.

The existing paving should be checked before installation, as a surface made up of individual units can shift in places over time. Any sunken, tilted or loose paving blocks, along with blocks that have noticeable lipping, should be reset in the laying course so that their top surfaces are level. This allows the rubber tiles to rest evenly across their full underside. Narrow, filled joints that are flush with the paving do not cause a problem. Wide or washed-out joints should be filled permanently.

If settlement or distortion affects a larger area, it should first be decided whether to repair the damaged sections or remove the old paving. Once the paving has been removed, the existing laying course is exposed and checked. It can then be topped up or replaced where necessary, compacted and screeded level. The rubber tiles are subsequently laid over it in the same way as over a new grit laying course.