How thick is the slate used for the freestanding stones?
• The thickness varies. We try to pick them so that they are thick enough to stand on their own without blowing over. 50mm to 60mm is the minimum thickness but for the larger, taller stones they may not be all that stable at whatever thickness, so we drill stabilising studs into the base so that they can be safely mounted onto concrete or a wall top, etc. We suggest this on all of the larger stones as they are quite heavy and we certainly wouldn’t want the stone to be damaged or someone’s cat getting squashed by it if it did blow over. We drill the stone and supply the studs so don’t worry.