In addition, since the coefficient of thermalexpansion of gypsum concrete is substantially greater than that of ceramic tile, shear stresses caused by temperature fluctuations canresult in delamination or cracking of the tile covering. This is particularly important when gypsum concrete is used as a thermal mass forradiant heated floors.
With the increasing popularity of radiant heated floors, which typically utilize gypsum concrete, tile installers need areliable installation system to address these issues.
This is particularly important since gypsum concrete must dry in order to gain strength. Unlike other surface coverings, the low thermalresistivity of ceramic and stone tiles allows them to be used in radiant heat applications without sacrificing the energy efficiency of thesystem.
However, there are inherent challenges in combining rigid surface coverings with radiant panel heating systems. A viableinstallation system must address the magnified fluctuations in temperature that contribute to increased shear stresses between the heatedassembly and the tile covering. The system must also limit thermal striping by promoting even heat distribution and protect the assemblyfrom moisture, which is particularly important when gypsum concrete is used as the thermal mass.
Differential movement stresses are magnified in radiant-heated floor applications because of significant temperaturegradients. This isparticularly important for gypsum concrete since it must dry in order to gain strength. In addition, the free space beneaththe matting limits thermal striping by promoting even heat distribution throughout the assembly.
If wood or gypsum concrete substratesare exposed to moisture, the tile layer above can be damaged as a result. Typical areas that require waterproofing include tub surrounds and showers.
However,there are other commonly tiled areas that may, through unexpected circumstances,become exposed to significant amounts of water; for example, an overflowed toilet, orruptured dishwasher, icemaker, or washing machine lines, which can result in flooding.
Waterproofing these floors can save an owner from replacing the tile assembly andsubstructure in the event of a leak. Theresult is a waterproof installation that will not suffer damage in the event of anunexpected water leak. Exteriorbalconies and terraces are ideal opportunities for the installation of tiled surfaces.
However, these installations have typically presentedsignificant challenges to tile setters. Since hard surface coverings are rigid by nature and have different physical properties compared tovirtually every substrate, they cannot be bonded directly to the substrate, particularly in exterior applications where they are exposed topotentially severe climatic changes and the recurring introduction of moisture. This is particularly important since these stresses are magnified by the significant temperature gradientscommon to exterior applications.
This is especially important when installing tile over a young slab, concrete slabs subject to moisture migration,or a fresh mortar bed. Sloped structureA sufficient slope 1. See note onoccupied space, pg. Available in many different colors and finishes.
Material: stainless steel or aluminum. Ceramic or stone tileInstall surface covering using unmodified thin-set. Note: Movement joints are mandatory; see page 20of this Handbook. The National Building Code ofCanada NBC requires that a roofing membrane be used on all balconies, decks andterraces that are not a flow through surface, including areas over occupied or unoccupied space.
Sloped wood structureA sufficient slope 1. Use exterior grade subfloor panels. Offset joints in thebackerboard panels in such a way that they do notline up with joints in the substrate. Fill gapsbetween panels with dry-set mortar and tape alljoints with 2" 50 mm -wide alkali-resistant meshtape. Also available: a complete line ofsystem accessories. Ceramic or stone tileInstall surface covering using unmodified thin-setmortar.
Note regarding occupied space: Occupied spaceis not limited to living space. For example, garages,open-air balconies with finished ceilings beneath, etc. As an alternative, tiles can be installed with an overhang. It is placed along the edge area of an existing sloped substrate. Garages, openairbalconies with finished ceilings underneath,etc. Roofing membraneThe roofing membrane must be sufficiently sloped 1. Edge insulation strip compressible foam 6.
Also available: a complete lineof system accessories. For example, garages,open-air balconies with finished ceilings underneath, Schluter etc. Any waterthat penetrates the mortar bed is directed under normalgravitational force to the drainage exits. In addition, thewaterproofing layer is effectively protected from damage. As an alternative, tilescan be installed with an overhang. The various components of atile assembly tile, mortar, substrate, etc.
Furthermore, structures that restrain overall expansion of the tile field walls, columns,etc. If the aforementioned movements are notaccommodated through the use of movement joints in the tile field and at restrainingstructures, the resulting stresses can cause cracking of the grout and tile anddelamination of the tile from the substrate.
Thus, movement joints are an essentialcomponent of any durable tile assembly. Guidelines for the placement of movement jointsField size not to exceed ft 2 The ratio between length and width shouldnot exceed See figures1, 2, and 3.
The sill seal band is placed against perimeter structuresbefore any component of the tile assembly is installed, e. See figures 2 and 3.
After the tile is installed and grouted, any excess sill seal materialis cut away, leaving a movement joint with uniform width that is void of any mortar, grout,or other restraining materials that would render the joint ineffectual. Surface JointsSurface joints must be placed within the tiled surface regardless of substrate conditions. See figure 4. They are typically placed at columns, walls, and anyother restraining surfaces. Expansion joints must be continued through the tile covering.
True cold joints bond the new concrete to the old and do not allow movement. Cold joints are treated in the same manner asexpansion joints. This is particularly important for gypsum concrete since it must dry in hahdbook to gain strength. This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website.
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But opting out of some of these cookies may have an effect on your browsing experience. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information. July 1, admin 0 Comments. Slowly move the roller from one end of the matting to the other, slightly overlapping successive passes.
Lift up a corner of the matting to check coverage. Proper installation results in full contact between the fleece webbing and the thin-set mortar.
Simply abut end and side sections of adjacent sheets. Note: Coverage may vary with mortar consistency, angle at which the trowel is held, substrate flatness, etc. If full coverage is not achieved, remove and reapply, making sure to verify proper mortar consistency and application. Solidly embed the tiles in the setting material. Periodically remove and check a tile to ensure that full coverage is being attained.
Back-buttering is a useful way to help ensure proper coverage, particularly when installing large-format tiles e. Waterproofing The following steps are required for waterproofing only: 1. DITRA is not intended to be barrier sound control system. DITRA does, however, provide a degree of sound attenuation similar DITRA is way easier to install than cement board.
This allows DITRA to be installed in commercial and industrial applications exposed to heavy vehicular traffic, provided the type, format, and thickness of the tile is appropriate for the application. What are the benefits of Ditra over the RedGard uncoupling mat? The result is a waterproof installation that will not suffer damage in the event of an unexpected water leak.
Owners of homes, condominiums, hotels. If an installation is to be completed uandbook cold temperatures, heat will be required in the space before, during and after installation to ensure proper curing of the mortar. Expansion and control joints. This means that when you use a notched trowel on it, the ridges created must stand up rather than settling.
There was a time when the tile countertop held a position.
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