Replacing old plaza surfaces is a task no owner or developer looks forward to, so when the time does arrive, few care to risk a system with a short or inconvenient performance record. The Ultimate Assembly® removes that element of mystery with time tested MM6125® waterproofing, insulation and drainage (both optional), topped with exceptionally durable architectural pavers and warranted by American Hydrotech Inc. Also the open joint configuration of the Ultimate Assembly make construction and maintenance incredibly simple.