Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 8410 2016 | TECH METHODS AND STANDARDS Recent proposals for the upcoming TCNA Handbook NTCA Methods and Standards Committee makes headway on six revisions By Kevin Fox, NTCA Methods and Standard Committee chairperson The NTCA Methods and Standards Committee’s work over the lasttwoyearsreapedgreatsuccessattheTCNAHandbookmeet- ing in Atlanta, Ga., recently. There were six proposals submitted, and with great help and guidance from the TCNA staff, all were approved. Following is a brief summary on each of them. I believe our proudest accomplishments are new sections on design and evaluation criteria pertaining to finished instal- lation appearance. These new sections are as follows: 1.Under the section GROUT JOINT SIZE AND PATTERN CONSIDERATIONS, you will find two new sub-sections, “System Modularity” which clears up confusion on modular tile sizes, gives design professionals guidance on using differ- ent sizes together, and points to the simple truth that when the tile modularity is not understood, design compromises are inevitable. The second new sub-section is “Tile Layout” which gives general tile layout provisions addressing rea- sonable expectations and limitations that challenge most projects. 2.Under the section USING THE TCNA HANDBOOK FOR SPECIFICATION WRITING, a new sub-section called “Design Considerations When Specifying Tile,” references the Handbook’s many sections that design professionals must familiarize themselves with that impact the selected tiles and designs. It gives a very important reference that strongly recommends industry standards, guidelines, and best prac- tices to be followed and strongly discourages variances from them. It also recommends in-situ mock-ups to be used under the given job site conditions. 3.Under the section FINISHED TILEWORK, is a new sub-section called “Visual Inspection of Tilework.” This will be extremely helpful for the industry. It recognizes the hand-build aspect of tile installations, references substrate requirements, lippage, allowable warpage, effects of lighting and many more factors that affect the installation visual and aesthetic appearance of the finished tilework. It also gives guidance on viewing distance and lighting when finish tilework is being inspected. EJ171 movement joint guidelines Another accomplishment, with substantial consultation from Crossville’s technical staff Noah Chitty and Tim Bolby, was major additions to EJ171 MOVEMENT JOINT GUIDELINES. Most nota- ble changes are recommendations in movement joint width and depth. The additions give a chart for minimum movement joint widths (for dry interior, not exposed to sun) in relation to joint frequency and tile thermal expansion properties, along with reference to the proper ASTM guides for calculating the joint. Another addition to this section is a new sub-section called “Wall Tile Movement Joints in Framed Wall Assemblies” (with substantial consultation with Tony Fuller of National Gypsum) which gives the design professional awareness that wall movement joints are unique and require consideration of other wall components such as sheathing, framing and backer board before the wall is constructed – and that such considerations many times cannot be retroactively added. Lighting and tile installations Many of us are familiar with the effects lighting has on an installation. A substantial new LIGHTING AND TILE INSTALLATIONS section has been added to give importance to this issue which can lead to much heartache for all involved. The majority of the added language was taken from the NTCA Reference Manual, so for many of you this will look familiar. Members of the NTCA Methods and Standards committee, represen- tatives from Crossville, National Gypsum MAPEI, TEC and Bostik, and the TCNA staff all assisted with the states submissions described in the article.