2024-25_NTCA_Reference_Manual_dig_dwnld

Proper Preparation Thin-Set Method Tile Installation – Notes/Letter

NOTES TO THE TILE CONTRACTOR

Date

Hydration reactions of Portland cement: Tricalcium silicate and beta-dicalcium silicate constitute about three quarters of the weight of a typical Portland cement powder. The remaining fraction consists chiefly of tricalcium aluminate and tetracalcium aluminoferrite. Under ordinary temperature conditions, and with adequate water available, the hydration of the latter two constituents is essentially complete within 7 days. Hydration of the tricalcium silicate, although well advanced at this time, may require a year or longer for essential completion, while the hydration of dicalcium silicate is appreciable only after several months, approaching completion after several years. Drexel Institute of Technology Philadelphia, PA The suggested sample letter shown here is to transmit with a copy of page 42 to the General Contractor. It is also suggest ed that additional copies be sent marked for all parties involved, i.e. project manager, superintendent, drywall contractor, mason ry contractor, and concrete finishers.

Company Address City, State Zip

Re: Project

Tile Preparation

Contact:

The specifications for this project require a thin-set tile installation. I believe it will be helpful to all trades involved to point out the specification requirements. I have enclosed a copy of the "Proper Preparation and ANSI Requirements for Thin-set Method Tile Installations." Please ask each trade involved to be guided accordingly. Adherence to these requirements will assist in obtaining a proper tile installation.

Should anyone have any questions, please contact me.

Name and Title Company

Encl.

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NTCA Reference Manual | 2024 / 2025

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Chapter 2 | Substrates