cov 09 how to avoid failure c

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How to Avoid FailuresDavid M. Gobis CTC CSI

©2009

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Coverings is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.

This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.

Learning Objectives• All tile and setting material is not created

equal. Are yours up to the task?

• Tile Industry and substrate trades guidelines, valuable resouces.

• Is your available labor qualified to do the job?

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Material Selection

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It is all about•Planning•Selection

• Execution

Planning

The right materials for the application

The right method for the application

The right labor skills for the job

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Proper Planning is About

This Not this

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Most Common Complaints

• Movement Joints

• Substrates

• Waterproofing

• Large Tile

• Thinsets7

Substrate Issues

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Appropriate SubstrateConcrete

American Concrete Institute

• ACI 302.2R-21• CHAPTER 5—FLOOR COVERING

AND ADHESIVE MANUFACTURER’S RECOMMENDATIONS

• 5.1—Introduction

The architect and engineer should communicate to ensure that the requirements for floor coverings in Division 9 of Construction Specifications Institute (2000) specifications are compatible with Division 3 requirements for concrete in the same specification

Tile Council of North America

American National Standards

• F-113

slab to be well cured, dimensionally stable, and free of cracks, waxy or oily films, and curing compounds.

• ANSI A108.01• 3.1.2.1• Do not use liquid curing compounds or

other coatings that may prevent bonding of tile setting materials to slabs. Use control joints through the slab and tile finish as specified or where cracks are anticipated.”

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Substrate Preparation

Clean Bondable

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Proper Substrate Preparation

YES ! NO !!!!!

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Wood Substrates

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Appropriate SubstrateWood

Engineered Wood Assoc. Tile Industry• maximum variation in plywood

surface shall not exceed 1/4" in10'-0" and 1/16" in 1'-0" from the required plane. Adjacent edges of plywood sheets—max. 1/32" above or below each other.

• floor systems, including the framing system and subfloor panels, over which tile will be installed shall be in conformance with the IRC

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www.apawood.org

Large Tile

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Big Tile and Patterns

Consider 1/3 offset with 12x24 tile

Make sure modular patterns fit

To minimize any natural warpage

This recent Standards revision now includes a category for Rectified Tile

Lippage Allowances (minus warpage)

Tile Type Tile Size Grout Joint Width Allowable

Glazed wall/Mosaics 1” x 1” to 6”x6” 1/8” or less 1/32”

Quarry 6” x 6” to 8”x8” 1/4“ or greater 1/16”

Paver (porcelain) All 1/8” to 1/4“ 1/32”

Paver (porcelain) All 1/4“ or greater 1/16”

1/32” of an inch is .0312 or about the thickness of a credit card1/16” of an inch is .0625 or about the thickness of a penny

Lighting

Critical Lighting Effects

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Planning for Waterproofing

The right materials for the application

The right method for the application

The right labor skills for the job

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Appropriate Design

3 Years Old 2 Years Old

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Appropriate Design

One Year Old

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Appropriate Design

And Even More Bad Ideas

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Appropriate Design

Showers Need Effective Waterproofing

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Board set on tub

DoorNail

Waterproofing

Appropriate Design

Plumbing code may be insufficient to protect the structure

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Appropriate DesignConsider waterproofing the entire area at the surface

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Enhanced?

Thinsets

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Mortar / Dry-Set / Thin-setConfusing Terminology

• ANSI 118.1 Dry-Portland Cement (Un-modified Thin-set)

• ANSI 118.4 Latex or Polymer-Portland Cement Mortar (Modified Thin-set)– Wall Tile Thin-set Mortar (Non-Sag Mortar)– Crack Prevention Mortar (Flexible Thin-set)– Complete Contact Mortar (No Back Buttering over flat

surfaces)– Rapid Setting Mortar (allows grouting and foot traffic

faster)– Medium Bed Mortars (Apply up to ¾” without excess

shinkage )

– ANSI 118.11 EGP Latex Mortar (Thin-set Over Plywood)

Get Specific Recommendations for Glass Tile

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Not All Thinsets Suitable for Exterior Use

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Ceramic Tile is NOT Structural

Always make surethe method used for

installation provides at

least 80% coverage

equally distributed, 95%

in wet areas or exterior

applications.

Dots Don’t Work!

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Ridges, Exterior Deck, Freeze/Thaw

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Movement Joints

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Always Provide Movement Joints

• interior — 20’ to 25' in each direction.

• exterior — 8' to 12' in each direction.

• interior tilework exposed to direct sunlight or moisture — 8’ to 12'

• where tilework abuts restraining surfaces

• same as grout joint, but not less than 1/4".

Incorporated into Every Job

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Recent Job

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The Question is NOT Will There be Movement

It Is How Much

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Questions?Dave Gobis

Independent Technical Consultant

262-994-1175

dave@ceramictileconsultant.com© 2009