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Floors, Interior - Ceramic or Porcelain Tile

16 inch (406 mm) o.c. joist spacing, single layer OSB or plywood subfloor

Areas of Application

  • over any even and structurally sound OSB or plywood subfloor with 16" (406 mm) o.c. joist spacing
  • interior dry or wet areas

Limitations
Legend

*** Essential
**   Significant
*     Helpful

Requirements
  • maximum spacing of joists, I-joists, or floor trusses is 16" (406 mm) o.c.
  • minimum subfloor thickness - 19/32", 5/8" nom. (16 mm) tongue-and-groove with 1/8" (3 mm) gap between sheets
Substrate Preparation
  • verify that subfloor panels are properly fastened to framing members
  • any leveling of the subfloor must be done prior to installing Schluter-DITRA
Movement Joints
  • Schluter-DITRA does not eliminate the need for movement joints, including perimeter joints, within the tiled surface. Movement joints should be installed in accordance with industry standards and norms, see guidelines for the placement of movement joints
Setting and Grouting Materials Setting and Grouting Specifications
  • tile - ANSI A108.5
  • grout - ANSI A108.6, A108.9, A108.10
Other Considerations
  • tightly butted and/or tented plywood or OSB seams must be addressed prior to installing Schluter-DITRA
  • vapor barrier on crawl space floors according to regional building codes
  • where a waterproof floor is required, all Schluter-DITRA seams and floor/wall transitions must be sealed with Schluter-KERDI-BAND using unmodified thin-set mortar, see waterproofing requirements for more details