This detail shows 2 cm (3/4 in.) thick dimension stone on an unbonded mortar bed over a concrete substrate. The mortar setting bed is separated from the concrete with a cleavage membrane to allow the stone assembly to move independent of the structure. The stone is typically fresh-set (i.e. the mortar bed is still workable) and adhered to the mortar with a cementitious bond coat; alternatively, the mortar bed may be allowed to cure before adhering the stone.

Optional compatible waterproof membrane (not shown) may be applied over the mortar bed if it is cured. The mortar bed is reinforced with a 2″ x 2″ galvanized wire mesh. Expansion joints in the floor assembly must be provided at locations shown by the design professional. This detail is based on Natural Stone Institute’s exterior stone paving detail, Full Mortar Bed with Membrane and Expansion Joint. Details that show different or modified concepts or methods can be of equal validity and should not be excluded from consideration. This detail shall not be used for construction without the approval and signature of a licensed design professional. The person using this detail shall be responsible for its complete design and proper application.

More to Explore

Dynamic 3D Detail

Explore this 3D detail and download the Sketchup model in the 3D Warehouse.

This site uses cookies

Small text files that are placed on your machine to help the site provide a better user experience. In general, cookies are used to retain user preferences, store information for things like shopping carts, and provide anonymised tracking data to third party applications like Google Analytics. As a rule, cookies will make your browsing experience better. However, you may prefer to disable cookies on this site and on others. The most effective way to do this is to disable cookies in your browser. We suggest consulting the Help section of your browser or if you decline you will be redirected to the About Cookies website which offers guidance for all modern browsers.