Tile & Stone

Questions for Prepare the Surface

1. Please refer to Product Data Sheets with questions
A: Tile installation guides.

Questions for Set The Tile

1. Can I store TEC® Skill Set™ Type I Mastic in my unheated garage?
A: No, although the adhesives are freeze/thaw stable for up to five cycles, long-term storage under repetitive freezing conditions will render it unusable.
2. Are all latex modified thin set mortars the same?
A: Latex modified thin set mortars are categorized by the performance criteria they meet. ANSI A118.4 mortar is designed for exterior conditions or for use with hard to bond to substrates (existing vinyl tile, ceramic tile, etc) and/or tile (porcelain tile). ANSI A118.11 mortars are designed for installing tile over exterior grade plywood C-C plugged or better. If you are planning to install tile over a plywood floor, be certain that the thin set specifically states that it is recommended for that purpose (ANSI A118.11). TEC Skill Set Fast Setting Mortar, which is accelerated and can be grouted in as little as three hours dry time, is additionally approved for use with plywood. Please refer to the TEC Skill Set Mortar Selection Guide to determine what the appropriate thin set mortar is for your particular tile type, size, substrate and service environment.
3. Can tile be installed in hot weather conditions?
A: Tile should not be installed on substrates or in weather that exceed 90 degrees. Steps should be taken to lower the temperatures or schedule the installation for early in the morning or later in the evening when temperatures are cooler. Additional options that are commonly used on commercial projects is to tent the area to be tiled to provide shade, and also to dampen the concrete about an hour before tile setting, the evaporation of the water will cool the concrete.
4. When do I need to add latex to TEC Skill Set thin set mortars?
A: Latex must be added to any mortar that is not already latex modified, when used on any exterior applications, interior tile applications over properly installed plywood, and over TEC Skill Set Waterproofing and Crack Prevention Membrane. This is also recommended over acceptable properly prepared existing floor covering.
5. Can I install ceramic tile over existing ceramic tile?
A: Yes. Existing ceramic tile should be clean and dry, then primed with TEC Skill Set Self Leveling Underlayment Primer full strength. After the primer is dry, set tile with one of the TEC Skill Set latex modified thin set mortars.
6. Can I use mastic for floor tile installation?
A: Yes, pay attention to tile size and type when using mastics for floor installations. In general, limit the tile size to no larger than 8" x 8". You can expect longer drying time when installing porcelain tile or any 8" x 8" tile with mastic. Be sure the the underlayment is approved for ceramic tile installations.
7. Can I use TEC® Skill Set™ Type I Mastic to install tile in a steam shower?
A: No. It is best to first utilize a waterproof membrane TEC® Skill Set™ Waterproofing and Crack Prevention Membrane behind the tile in a steam shower. Waterproof membranes require the use of a latex modified thinset mortar to install the tile. Select from the TEC® Skill Set™ Latex Modified Mortars for the appropriate setting material.
8. What is the highest temperature that TEC® Skill Set™ Type I Mastic can be exposed to once applied?
A: Do not use in any area where temperatures exceed 120 degrees Fahrenheit.
9. How long should I wait to fill the pool?
A: Twenty-one days after the tiles are installed and grouted.
10. Can I set ceramic tile over Oriented Strand Board (OSB)?
A: No. The primary approved wood substrate for ceramic tile installations is APA (American Plywood Association) exterior grade plywood, C-C plugged or better. Other non-approved substrates include rubber, strip wood floors, particleboard, lauan plywood, hardboard, & treated plywood.
11. Can I add additional latex to a latex-modified thin set?
A: No. Never add additional latex to a latex-modified thin set.
12. Can tile be installed over adhesive residue?
A: If the adhesive is soft or tacky it must be completely removed. Black Adhesive (Cut-back) residue is acceptable provided the adhesive is well bonded to an approved substrate. Scrape the adhesive residue until it is no thicker than a sheet of paper and almost transparent. Loose or weak adhesive may prevent a good bond between the tile and substrate, resulting in installation failure. Water based cutback adhesive is not acceptable, it must be removed with soap and water. To determine, place soap and water on adhesive, observe if adhesive is softened. Once the substrate is properly prepared, TEC Skill Set latex modified thin sets are recommended.
13. There are thin set mortars (ANSI 118.1) and latex modified thin set mortars (ANSI A118.4 or A118.11). What is the difference?
A: The addition of latex is the main difference in these two types of products. Latex modified thin sets are required for installations involving difficult to bond to substrates (EGP, Vinyl tile, ceramic tile). They are also required for installing difficult to bond to tile (porcelain) and for all exterior applications. Non-latex modified thin sets (ANSI A118.1) can be used for interior applications on concrete, masonry, cement board, drywall, and mortar beds except when porcelain tile is being installed.
14. Do porcelain tiles require a special adhesive?
A: Porcelain tiles require the use of (ANSI A118.4 or better) latex-modified thin set mortar. See the TEC Skill Set Mortar Selection Guide.
15. What should I use to install ceramic tile in a steam room?
A: For a steam room application, TCNA (Tile Council of North America) specification SR614-01 should be followed. The ceramic tile can be set with TEC Skill Set latex modified thin sets. You may also use TEC Skill Set Floor Mortar or TEC Skill Set Floor and Wall Mortar by mixing with TEC Skill Set Mortar Additive. Allow 7 days cure prior to using the steam room.
16. Can Grout Boost be used with TEC Skill Set mortars?
A: No. Grout Boost is formulated to mix with cement based grouts only, like the TEC Skill Set DesignColor grouts. Be sure to used Sanded Grout Boost with sanded grout and Unsanded Grout Boost with unsanded grout.
17. Can I dilute the latex additive before use?
A: No, TEC Skill Set Mortar Additive is specifically formulated to perform with TEC Skill Set Floor Mortar and TEC Skill Set Floor and Wall Mortar.
18. What should be used to set fixtures such as a soap dish or towel rack?
A: Fixtures should be set with a thin set mortar, construction adhesive or 100% silicone. Do not use tile mastic.
19. How long can I keep any leftover TEC® Skill Set™ Type I Mastic?
A: If the container is tightly sealed you may keep them for 6 months if stored inside in a cool, dry location. Applying saran wrap (plastic wrap) directly over the adhesive before reapplying the lid aids in preserving freshness. Keep in mind that when the containers are open they are losing moisture.
20. I understand that waterproofing compounds, membranes, sealants, grease, oil, wax, and other foreign matter will impair the adhesion of adhesives on concrete. These are not always visible. Is there any way that I can check my concrete?
A: Obviously you will want to remove anything that is on the surface that you can see such as residues of old adhesives, etc. There is a simple test though for coatings that are not visible. It is called the "water droplet test". Put water droplets on various spots on the floor. If the water beads up, there is something on the surface that will impair adhesion. It is recommended to remove the contamination prior to installing the tile.
21. Can I set ceramic tile on a single layer of plywood?
A: No. The floor construction must be at least two layers of plywood with a total floor thickness of 1 1/8". Floor deflection should not exceed L/360 for ceramic tile and L/720 for the installation of marble.
22. Can I install ceramic tile over a plastic laminate countertop?
A: Yes. Plastic laminate is an approved substrate for interior countertops with TEC Skill Set latex modified thin set mortars provided the counter is structurally sound and level. To prepare the countertop surface; first chemically strip any sealers or finishes off of the surface, then lightly abrade, thoroughly rinse and dry completely.
23. Can I use TEC® Skill Set™ Type I Mastic to set 12" x 12" tile?
A: Yes, but only for wall installations. However, you can expect an extended drying time. Do not grout until the mastic has dried and tile are set firmly in place.
24. Can I use TEC® Skill Set™ Type I Mastic to install ceramic tile over a plastic laminate counter top?
A: Yes, but first chemically strip any sealers or contaminants, if they exist, off of the counter top. Then lightly sand the counter top, rinse and let dry. You can expect an extended drying time. Do not grout until the mastic has dried and tile are set firmly in place. See TCA detail TR711 for more details.
25. Can TEC® Skill Set™ Type I Mastic be used under white or translucent stone?
A: Yes, but not over plywood. Over other substrates, always test the natural stone for potential discoloration. Install a sample and allow it to dry thoroughly. Stone that displays discoloration should be set with TEC® Skill Set™ Marble Mortar or one of the TEC® Skill Set™ Mortars in white, not gray.
26. What type of thin set should be used for a concrete swimming pool?
A: Any TEC Skill Set mortar that is latex modified is recommended for exterior pools or if the tiles to be installed are porcelain. You may also use any of TEC Skill Set non-latex modified thin set mortars by mixing them with TEC Skill Set Mortar Additive. If the pool is an indoor pool and the tile is not porcelain, any TEC Skill Set thin set mortar can be used.
27. The label references TCNA Installation Detail F142. What does this refer to?
A: TCNA is the Tile Council of North America. The number refers to an accepted and proven tile installation method.
28. Should I use a thin set mortar on the floor?
A: Yes, thin set mortars are very effective and highly recommended for floors. For tile larger than 8" x 8" and/or in excessively wet areas (steam rooms) or exterior installations, thin set mortars are required. Please refer to the TEC Skill SetTM Mortar Selection Guide to determine the appropriate thin set mortar for your particular tile type, size, substrate and service environment.
29. How can I remove TEC® Skill Set™ Type I Mastic from a tile surface?
A: If the mastic is relatively fresh, warm soap and water can be used. Well dried mastic should be scraped down to a film, Mild Odor Mineral Spirits (MOMS) can soften and remove the residue.
30. What do I do if the TEC Skill Set Mortar Additive freezes?
A: Allow the latex additive to gradually return to room temperature before using. Do not accelerate thawing of the additive.
31. Can I use TEC® Skill Set™ Type I Mastic to install a bathtub soap dish?
A: No. Tile fixtures such as these require high bond strengths that develop quickly.
32. What size trowel should I use to set my floor tile?
A: No matter which trowel you select, keep in mind that bonding mortar coverage is the issue. Try to achieve a minimum of 80% coverage for interior and/or dry areas and 100% for wet or exterior installations. Check a tile occasionally during installation to verify. Typically, for tiles up to and including 6" x 6" tile, use a 1/4" x 1/4" x 1/4" square notch trowel. For tile larger than 6" x 6" up to and including 12 " x 12" tiles, a 1/4" x 3/8" x 1/4" square notch trowel should be used. For tiles larger than 12" x 12" and for substrate variations up to 1/4" in 10' will require a bigger notch such as a 1/2" square notch trowel or a 3/4" round notch trowel. See the TEC Skill Set Mortar Selection Guide.
33. Can TEC® Skill Set™ Type I Mastic be used to set green marble or glass tile?
A: No. Green marble can be very sensitive to moisture and must be set with TEC® Skill Set™ Marble Mortar. Glass tile should be set with TEC® Skill Set™ Glass Tile Mortar.
34. What TEC Skill Set thin set do I use to bond ceramic tile to plywood?
A: Latex modified thin set mortars (ANSI A118.11) including TEC Skill Set Glass Tile Mortar, Marble Mortar, Natural Stone and Large Tile Mortar, Porcelain Mortar, TotalFlex Universal Mortar and Fast Setting Mortar. You may also use TEC Skill Set Floor Mortar and TEC Skill Set Floor and Wall Mortar, non-latex modified thin set mortars, by mixing them with TEC Skill Set Mortar Additive. The plywood must be exterior grade plywood C-C plugged or better. For CDX Plywood, use TEC Skill Set Floor and Wall Mortar mixed with TEC Skill Set Mortar Additive.
35. Should I use a thin set mortar on the wall?
A: Yes, thin set mortars are very effective and highly recommended for walls. For tile in excessively wet areas (steam rooms) or exterior work, latex modified thin set mortars are required. However, for interior residential installations (showers, bath, kitchen), a Type I Mastic is also appropriate. Please refer to the TEC Skill Set Mortar Selection Guide to determine the appropriate thin set mortar for your particular tile type, size, substrate and service environment.
36. How can I tell if my floor tile is ready to grout?
A: The first check is to try and twist the tile to see if it moves. If there is movement, additional cure time is required. If the tile won´t twist but you hear a wet suction sound when the tile is stepped on, additional cure time is also required
37. How should ceramic tile be installed over Gypcrete?
A: Due to the moisture sensitivity of gypsum based underlayments, ceramic tile cannot be installed directly over Gypcrete without the use of a crack isolation and waterproof membrane. TEC Skill Set Waterproofing and Crack Prevention Membrane can be applied first, then install ceramic tile with one of the TEC Skill Set latex-modified thin set mortars.
38. Can I install tile over my existing VCT or existing sheet goods?
A: Yes. The existing VCT must be a single layer. If the existing VCT (or sheet goods) is over plywood, refer to plywood installation guide for the minimum floor thickness. Sheet goods (only non cushion is acceptable) must be full glue down and not just glued around the perimeter. All linoleum must be stripped and cleaned of waxes, dirt and any contaminants that will interfere or prevent a good bond [chemically strip first, then rinse thoroughly with clean water and allow to dry completely]. Once the substrate is properly prepared, TEC Skill Set latex modified thin sets are recommended. NOTE: Unless you are positively certain that the product you intend to remove is a non-asbestos containing material, you must presume that it contains asbestos. Regulations may require that the material be tested to determine asbestos content. According to the Resilient Floor Covering Installers Handbook "Do not sand, dry sweep, dry scrape, drill, saw, bead blast, or mechanically chip existing resilient flooring, backing, lining felt, asphaltic cutback adhesive or other adhesive prior to determining asbestos content".
39. Can I mix TEC Skill Set Mortar Additive in TEC Skill Set DesignColorTM Grout?
A: No. the TEC Skill Set Mortar Additive should be used only as an additive for TEC Skill Set Floor Mortar or TEC Skill Set Floor and Wall Mortar. Use Grout Boost® Stain Resistant Additive for TEC Skill Set DesignColor grouts.
40. Can TEC® Skill Set™ Type I Mastic be used over a painted surface?
A: Yes, but for wall installations only, not floors. The paint should be clean, dry and should be at least 2 weeks old (no freshly painted surfaces). Oil based painted surfaces should be at least one year old. High or Semi Gloss painted surfaces should be lightly sanded, rinsed and allowed to dry. You can expect an extended drying time. Do not grout until the mastic has dried and tile are set firmly in place. See TCA detail TR711 for more details.
41. I am installing porcelain tile. How much additional time should I allow it to set prior to grouting?
A: Porcelain is very non-absorptive. In some circumstances the dry time could exceed twice that of an absorptive ceramic tile. Factors that can extend the dry time are low temperatures, high humidity, and lack of air circulation, non-porous substrates, large tile size, and narrow grout joints. Do not grout until the mastic has dried and tile are set firmly in place. Using TEC® Skill Set™ Porcelain Mortar is another option.
42. Can I install tile over glazed ceramic tile?
A: Yes, but you must first abrade the glaze from the existing ceramic tile. A belt sander or a carborundum disk can be used to accomplish this. The glaze must be abraded so that the moisture in the mastic can absorb into the existing tile, allowing the mastic to dry. You can expect an extended drying time. Do not grout until the mastic has dried and tile are set firmly in place. See TCNA detail TR712 and/or TR713 for more details.
43. How do I install cement board over plywood?
A: Refer to the specific Cement board manufacturers guidelines for installation (this is important being as the different cement board manufacturers have different requirements to maintain their product warranties), then select the appropriate TEC Skill Set thin set mortar, according to their requirements, for establishing the support plane for the backer board.
44. Where do the ANSI numbers come from?
A: American National Standard Institute. ANSI has developed Specifications for materials and the Installation of Ceramic Tile.
45. Why does mastic appear soft or damp after 24 hours?
A: Lack of airflow, high humidity, and/or substrate temperature (below 60 degrees F) will extend the drying time. Tiles larger than 6” x 6” will require additional time for mastic to dry. It would help if you could warm the area and increase the airflow to accelerate drying. Do not grout until the mastic has dried and tile are set firmly in place.
46. Can ceramic tile be installed over my existing laminate floor?
A: No, the laminate floor must be removed and the substrate prepared for ceramic tile.
47. Can TEC® Skill Set™ Type I Mastic be used outdoors?
A: No. Mastic should be used for indoor tile installations only. TEC® Skill Set™ latex modified thinsets can be used exterior.
48. I understand that waterproofing compounds, membranes, sealants, grease, oil, wax, and other foreign matter will impair the adhesion of adhesives on concrete. These are not always visible. Is there any way that I can check my concrete?
A: Obviously you will want to remove anything that is on the surface that you can see such as residues of old adhesives, etc. There is a simple test though for coatings that are not visible. It is called the "water droplet test". Put water droplets on various spots on the floor. If the water beads up, there is something on the surface that will impair adhesion. It is recommended to remove the contamination prior to installing the tile.

Questions for Grout & Caulk

1. Does all grout need to be sealed?
A: No. Grout mixed with Grout Boost® does not require a sealer
2. Grout is Cracked. Possible Cause: Grout Shrinkage, too much water in the grout mix design or the wrong grout was used (unsanded vs. sanded). These cracks will typically run across the groutline and be noticed within 2 to 7 days of the grout application.
A: • If too much water was used in the mix, it may also be soft. Remove and replace grout, using the recommended amount of water (or Grout Boost®). • Cementitious grouts have dimensional limitations. If you use a grout in a wider than recommended application, it can also display cracks running across the groutline. Sanded grout should be used in groutlines between 1/8 and 1/2 inch wide. Unsanded grout should not be used in groutlines wider than 1/8 inch. If you have wall tile or marble with groutlines wider than 1/8 inch, you may need to use sanded grout, but BE CAREFUL…. wall tile and marble can be scratched by Sanded grout. Either find a method for protecting the tile or marble surface from scratching or place the grout, softly, by hand, avoiding the use of a grout float. TEST your method before proceeding with the installation. If your unsanded grout is white, and you have experienced shrinkage cracks in the grout, you may be able to open the cracks with a utility knife, being careful not to scratch the tile, and then regrout the opened cracks using fresh grout. If this method is attempted with a colored grout, the new grout may appear a different color. If you choose to try using a grout in a wider than the recommended application, try mixing the grout with Grout Boost® additive and keep your mix as dry as possible to minimize the shrinkage. Cracks may still occur.
3. What is efflorescence?
A: Efflorescence (a whitish powder or surface crust) can occur in any Portland cement product. TEC Skill SetTM Sanded and Unsanded grouts are made with Portland cement. For this reason TEC Skill SetTM cannot guarantee that efflorescence will not occur.
4. Can I install grout in Freezing conditions?
A: No. The strength of Portland cement products is compromised when there is early exposure to temperatures below 40°F. Actual freezing is even more damaging. Cement Grout that will be exposed to freezing conditions must be modified, using Grout Boost®, and must be allowed to cure at 50°F or better for 10 days prior to exposure to freezing temperatures.
5. New grout is lighter than expected. Possible Cause: Too much water in mix design or cleanup process
A: Dampen the grout. If the color of the wet grout is uniform and acceptable, allow to dry then use an enhancing sealer to darken and seal the grout, do a test area to confirm the final appearance.
6. Grout is Cracked. Possible Cause: Structural Movement. These cracks tend to run more linear, often you can trace a crack running continuously along several tile, jumping across a groutline as it goes.
A: The plywood floor may be too thin (minimum 1 1/8 inch total thickness is needed). Reinforce structure, providing additional support from underneath the floor, then remove and replace grout or remove the tile and install additional plywood; replace the tile and grout.
7. New grout is lighter than expected. Possible Cause: Efflorescence FOR MARBLE
A: Dampen the grout, if the color looks acceptable use an enhancing sealer. Test the sealer in an inconspicuous area, allowing it to dry 2 days to see how the grout will look.
8. I only need a little Grout for a patch. How much water do I add to a cup of powder?
A: TEC Skill SetTM recommends only mixing full containers of the grout. It is very important to remember that settling can occur when shipping dry products. If you choose to use only a portion of a container, dry mix the grout prior to taking a portion the material. • For one cup of TEC Skill SetTM Unsanded grout add 2.5 oz. of water • For one cup of TEC Skill SetTM Sanded grout add 1.8 oz. of water
9. New grout is lighter than expected. Possible Cause: Efflorescence FOR TILE
A: Use a grout haze remover or mild acid cleaner (after 10 day cure) with stiff bristle scrub brush. When using an acid cleaner, wet the grout surface prior to application. If the grout is uniform in color and further darkening is desired, use an enhancing sealer to darken further. Do a test area to confirm the final appearance.
10. Which Grout should I use? Selection criteria: Width of joint; Service Environment (Chemical resistance)
A: Sanded Grout, for groutlines 1/8" or greater (check to be certain that the tile or natural stone is scratch resistant, sanded grouts can scratch soft surface glazes) Unsanded Grout for groutlines 1/8" or less. Epoxy Grout for Chemical resistant environments
11. Why isn’t my grout color a perfect match to the grout chart that I saw in the store?
A: Samples in the grout brochure are representations of colors manufactured by TEC Skill SetTM. Variations in color can be experienced from lot to lot. A test area is recommended prior to application to ensure satisfaction of color appearance. When grouting highly absorptive tiles, slightly darker tones of color may be expected. Sanded, and unsanded grouts may vary slightly due to differences in composition. Various external factors may affect the color shading of the grout and are beyond the control of TEC SkillSet; therefore, exact color matching or consistent shading of the grout cannot be guaranteed.
12. New Grout is blotchy or inconsistent in color development. Possible Causes: Inconsistent application conditions, efflorescence, inconsistent grout depth, moisture exposure, or improper mix ratio. Inadequate or improper mixing, cut tile edges, and over glazing of tile edges can also affect appearance.
A: Dampen the grout. If the color of the wet grout is uniform and acceptable, allow the grout to dry then use enhancing sealer to maintain the "wet" color. Always do a test area to confirm the final appearance.
13. New Grout is darker than expected. Possible Cause: Grout is wet.
A: Allow the grout to dry (this may take more than 2 days). If the darkening resulted from water exposure to the grout surface, allow grout to dry. If color is corrected, seal the dry grout. Always do a test area to confirm the final appearance.
14. Grout is eroded or pitted. Possible Cause: Harsh environment
A: Grout that has significant exposure to grease, oil, dairy products, acids or other harsh chemicals could be eroded by the chemical attack. A chemical resistant epoxy grout should be used to survive these types of chemically harsh environments.
15. What grout should I use in a swimming pool, do I need a special additive?
A: TEC Skill SetTM Sanded and Unsanded can be used in a pool, no special additive is needed unless the pool is an outdoor pool, in which case Grout Boost® additive must be mixed with the grout. Mortar and grout must be allowed to cure for 21 days prior to filling pool with water.
16. Existing Grout is darker than expected. Possible Cause: Adhesive/setting material was not dry prior to grouting.
A: Allow to cure 10 days, then use a mild acidic cleaner per the label copy (be sure the tile is not acid sensitive). Always do a test area to confirm the final appearance. If this is not successful, remove the grout, allow the installation to dry out for 48 hours and then re-grout.
17. Grout is Cracked. Possible Cause: Omission of expansion joints such as at dissimilar substrates (where plywood subfloor meets concrete, etc.).
A: Remove grout directly over the substrate transition and install appropriate elastomeric sealant. Refer to Tile Council of North America Detail EJ 171.
18. Grout is eroded or pitted. Possible Cause: Installed grout that exceeded shelf life.
A: If the grout has exceeded its’ shelf life, it can result in a weak or soft groutline. If it has been used, remove and replace grout using fresh material. Using vinegar for routine cleaning can also cause the erosion. Use only neutral PH cleaners.
19. How can I change the color of my grout?
A: It will be necessary to remove all sealers from the grout if you wish to change its color. If you dampen your grout and it has an acceptable color, let the grout dry thoroughly, use an enhancing sealer to seal the grout and maintain the "wet" color. A grout colorant can also be applied following the manufacturer’s application directions.
20. How do I remove a film of cured Grout on tile?
A: For Cement Grout use a non-acidic grout haze remover with a sponge and/or nylon-scrubbing pad. If the grout has cured more that 7 days, use a mild acidic grout haze remover according to manufacturer’s directions.
21. Grout is weak or powdery. Possible Causes: Too much mixing and/or clean up water; grout exposed to moisture during storage, using grout that was beyond shelf life, grout was installed in extreme conditions (excessive hot, dry or cold), grout was not mixed with Grout Boost® additive for freeze/thaw (exterior or freezer) applications. Over exposure to acidic cleaners.
A: If exterior or in a freezer, remove and replace the grout, using Grout Boost® additive in place of water. Allow the grout to cure 10 days before exposure to freezing temperatures. For all other conditions listed above, remove and replace the grout with fresh grout, keeping application temperatures above 50°F and below 90°F.
22. Grout is Cracked. Possible Cause: Movement: Concrete that cracks after the tile was installed.
A: Depending on the amount of movement that caused the cracks in the concrete and the direction of movement, you MAY be able to keep the cracks in the concrete from showing up in the tile and grout. TEC Skill SetTM Waterproofing and Crack Defense membrane can provide crack suppression for horizontal movement up to 1/8 inch. Remove and replace tile and grout in the affected area, use this membrane prior to the installation of the tile.
23. When should I use Grout Boost® grout additive?
A: It is mandatory to use this additive when grouting an outdoor installation, or when there will be exposure to freezing temperatures such as a walk in freezer. It is also recommended if high stain resistance is desired.
24. When can I begin initial cleaning of Grout residue?
A: Initial cleanup should begin 15 to 30 minutes after grouting. Touch the grout to see if firm, not soft. If no grout residue transfers to your finger, grout is ready to be cleaned off the tile.
25. Grout is Cracked. Possible Cause: No bond to tile (overglaze).
A: Remove and replace grout, using Grout Boost® additive instead of water.
26. Should I seal my grout?
A: Cement Grout will absorb liquids that are spilled on it. If you wish to provide some protection from staining it will be necessary to apply a grout sealer. It will not make the grout stain proof, but it will allow an extended time to clean spills before they can be absorbed. Grout Boost® stain resistant grout additive can be mixed with the grout instead of sealing the grout with a grout sealer.
27. How do I clean dirty or stained grout?
A: Use a cleaner that is specific for the soil to be removed following manufacturer’s recommendations.
28. Grout is Cracked. Possible Cause: Loose tile
A: Remove and replace tile and grout.
29. What grout should I use with polished marble?
A: Since marble scratches very easily, you should only use TEC Skill SetTM unsanded grout. Groutlines should be no wider than 1/8 inch. TEC Skill SetTM recommends that you DO NOT use an additive when grouting marble. If you have wall tile or marble with groutlines wider than 1/8 inch, you may need to use sanded grout, but BE CAREFUL…. wall tile and marble can be scratched by Sanded grout. Either find a method for protecting the tile or marble surface from scratching or place the grout, softly, by hand, avoiding the use of a grout float. TEST your method before proceeding with the installation.