BEFORE THE ARCHITECT – CUSTOM HOME DESIGNING BACKGROUND – HOUSE DESIGN ARTICLES
DISABLE BATHROOM WALL TILING DETAIL
By Before The Architect Copyright 2006, 2009
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Comment: Particularly with progressive disabilities, that which is comfortable, safe, and useful today may not be tomorrow. An eventual need to alter interior cabinetry, closets, and other wall obstructions is significantly facilitated by rediscovery of finished tile wall beneath existing interior wall framing. Wall intrusions for fastening can be plugged and grouted or decoratively filled as with low profile, physically unobtrusive, smooth-faced carriage bolt heads, etc.
1) Wall tiling detail in a disabled bathroom
a) Shall extend in surface area coverage overall without interruption to finish height and width
b) Before application of interior walls, cabinets, and other wall face obstructions, and
c) Shall be finished
Comment: Such extensions make subsequent retrofit by relocation or removal less physically disruptive, messy, time-consuming, and expensive.
2) Wall tiling detail in a disabled bathroom, including base (Wall) tile and shower wall tile and bathtub wall tile, shall be applied over WATER AND MOISTURE IMPERMEABLE MEMBRANE OVER not less than ¼ linear inch cementitious backerboard
Comment: What’s good for bonding and stability of floors in our Standard above for the application of cementitious backerboard is, as well, good for wall tile, and for the same reasons. The permissibly thinner dimension for wall tile backerboard relative to floor tile backerboard respects lower levels of force on wall tiles. (See Comment immediately below.)
Comment: Note please that wall-mounted backerboard and tiles should not be considered sufficient structure of themselves to withstand the shear forces and tension forces that can result from the common, or everyday, use of grab bars, let alone for emergency use.
Comment: Only cementitious backerboard shall be applied without the express understanding and consent of owner(s) and contractor(s) as to the alternative application of glass mat backerboard which is suitable only for dry area use.
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