TL-0028 - Tile Wearing Surface Technical Letter
This technical letter provides guidance on setting beds for tile to be placed over surfaces waterproofed with Bituthene® or Procor®.
There are two basic classes of tile setting beds:
- Portland cement mortar
- Thin set mortar
There are several materials used as thin set mortars such as latex-Portland cement, epoxies, and furan. As the name implies, thin set mortars are usually applied less than 1 4 in. (6 mm) in thickness.
There have been instances of poor adhesion of thin sets over some waterproofing systems. We do not recommend using Bituthene® or Procor® in conjunction with thin set mortar. Bituthene® and Procor® may be used in conjunction with wire mesh reinforced Portland cement mortar setting beds at a minimum thickness of 11 4 in. (31.75 mm) as recommended by the Ceramic Tile Institute. A protection layer between the Bituthene® or Procor® and mortar is required. Examples include Hydroduct® 660, 1 8 in. (3 mm) asphaltic hardboard and 1 in. (25 mm) extruded polystyrene.
Please review the standard application procedures found on Bituthene® and Procor® Data Sheets.
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Last Updated: 2022-04-27