[LazyPup]

Due to the high humidity levels and the liklihood of splashing water on the walls normal sheetrock may not be used on the walls in a bathroom.

Bathroom walls ( except in the shower enclosure) are to be made with Water Resistant Gypboard (Green board).


NOTE: code references -IRC =International Residential Code & UPC = Uniform Plumbing Code.

GREENBOARD (WATER RESISTANT GYPBOARD)

1. Greenboard MAY NOT be applied over a vapor barrier IRC 702.4 UPC 2512

2. Greenboard ok for direct adhesive application of ceramic tile (Not in a shower) IRC 702.4.3 & UPC 2512

3. All cut or exposed edges must be sealed with a water resistant sealant IRC 702.4.3 UPC-Per Manufacturers specifications

4. Greenboard may not be applied on a ceiling if the framing is greater than 12" center to center. IRC 702.4 & UPC 2512

5. Water resistant materials must extend to a minimum of 72" above the finished drain of the tub or shower. IRC 307.2 The UPC requires the water resistant materials to extend to minimum of 70" above the finished drain height -UPC 807.1.3

TILE BACKER BOARD (CEMENT BOARD)

1. Suitable for adhesive ceramic tile IRC 702.4.1 UPC- Check local code requirements.

2.Backerboard REQUIRES BUILDING PAPER BACKING (moisture barrier) IRC-per manufacturers specifications & UPC 807.1.3

3. Backerboard requires water resistant fasterners _IRC-Per Mfg instructions & UPC 807.1.3

4. All joints covered with water resistant sealant _IRC 702.4.2 & UPC 807.1.3

5. Backerboard MUST extend to 72" above the finished drain elevation IRC307.2 UPC = 70" UPC 807.1.3