Archives

02.010.1302: Control Joint – Grout Fill

This detail shows standard CMU being used at the vertical control joint, with vertical grout fill used to key in the block. The building felt breaks the bond at one side of the grout fill, to allow for shrinkage of the block, while providing some resistance to lateral loads. There is horizontal joint reinforcement at […]

06.130.F122: Tile Floor Adhered to Concrete Substrate

Tile floor with bonded mortar bed over concrete substrate06.130.F122: Tile Floor Adhered to Concrete Substrate This detail shows ceramic or stone tile adhered to a concrete substrate with a cementitious bond coat. If specified, a compatible waterproof membrane may be applied over the concrete. Expansion joints in the floor assembly must be provided at locations shown by the design professional. This detail is [...]

Masonry Cleaning General Reference Guide

The Masonry Restoration Cleaning Guide is intended to be used as a general guide in developing an appropriate cleaning campaign for existing and historic masonry, therefore this information may not apply in unique situations. We recommend always beginning with the least aggressive cleaning method. Whichever cleaning method(s) are chosen, always test in discreet but representative […]

06.410.1312: Expansion Joint, Tile on mortar bed

06.410.1312: Expansion Joint, Tile on mortar bed This detail illustrates an expansion joint in a tile floor laid on a cured reinforced mortar bed over a concrete or wood substrate, with a cleavage membrane separating the tile assembly from the substrate.  The expansion joint is installed through the tile and through the mortar bed, all [...]

Terrazzo and Vapor Barriers

Controlling Moisture is Critical
The evolution of terrazzo from a cementitious system to epoxy brings a new concern: controlling moisture. While the cement system developed centuries ago allowed moisture to naturally migrate from the ground or concrete slab and then escape, epoxy-based terrazzo systems do not breathe. That means that if the concrete slab or space below is not controlled, and moisture rises up, epoxy terrazzo will usually fail.