Expansion joints spacing and type: (a) Inside & Outside, (b) Special conditions, (c) Width of joint?, (d) What material is packed into joint?
These are broken down in great detail in the TCA Handbook. a. Interior spacing recommended every 24 to 36 feet in both directions. Exterior spacing recommended every 12 to 16 feet. b. Whenever there is a change of material in the substrate; where ceramic tile abuts perimeter walls, columns, etc.; where it passes over control, slab expansion, seismic, cold, structural joints. c. Depending on spacing of expansion joints; EX: 5/8″ at 24 feet, 3/8″ at 12 feet, etc. d. There are a variety of suitable sealant materials including; silicone, urethane, polysulfide available in matching colors to the regular grout. Sealants used in traffic areas require a Shore A hardness of 35 or greater.
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