Tile Floor Install: Selecting and Applying Thin Set Mortar
Prior to applying thin set mortar and and starting to install the floor tiles, be sure that you have taken the time to ensure that your tile layout is correct.
For more information about completing a proper floor layout, check out our article: DIY Guide: How to layout a tiles floor
Table of Contents
Thin Set Mortar: Pre-mixed vs Mortar that Requires Mixing
Thin-set mortar comes in two main types: pre-mixed and mortar that needs to be mixed on-site. Here are the key differences between the two:
Pre-Mixed Thin Set Mortar
Pre-mixed thin-set mortar is already mixed to the correct consistency and ready to use right out of the container.
Benefits
- Convenience: It saves time and effort since there’s no need to mix it yourself, which can be particularly useful for small projects or repairs.
- Cost: For DIY homeowners, Pre-mixed Thin-set eliminates the cost of purchasing a powerful drill and mixer required for the thin-set that needs to be mixed.
Mortar That Needs to Be Mixed
This type comes in powder form and needs to be mixed with water or a liquid additive to reach the correct consistency.
Benefits
- Flexibility: You can adjust the thickness and workability by controlling the amount of water added, which is advantageous for different applications and tile types.
- Extended Shelf Life: Generally, powder thin-set mortar has a longer shelf life compared to pre-mixed versions, as long as it’s stored correctly in a dry environment.
- Cost: Pre-mixed mortar is often more expensive per unit compared to powder mortar, though this can vary depending on the brand and specific product.
Application: Both types can be used for various tile installations, but some types of tiles or substrates may require a specific type of thin-set mortar. Always check the manufacturer’s recommendations.
Choosing between pre-mixed and mortar that needs to be mixed depends on factors like the size of your project, convenience, cost considerations, the specific requirements of your tiling job, your experience, and the tools / equipment you currently own.
For smaller projects or when convenience is paramount, pre-mixed thin-set mortar is often preferred. For larger projects or when you need specific control over consistency, mortar that needs to be mixed on-site might be more suitable.
SureReno always guides our DIY homeowners, the most SureWay possible thus we recommend using pre-mixed mortar. If you are a more experienced DIYer, and you own the proper power drill and mixing paddle, you may prefer mixing your thin-set mortar.
Ask a dozen experts and get a dozen different answers!
Use the Right Trowel
When installing tiles using thin set mortar, selecting the right trowel is crucial for achieving proper adhesion and a level surface. Here are some tips to help you choose the correct trowel:
Understand Trowel Notch Sizes
Trowels come with different notch sizes (e.g., 1/4 inch, 3/8 inch). The notches create ridges in the mortar, which helps with tile adhesion and leveling.
Consider Tile Size and Type
The size and type of tile you are installing will dictate the notch size of the trowel. Larger tiles generally require a larger notch size to ensure adequate mortar coverage.
- For small tiles (less than 6 inches), use a 1/4 inch notch trowel.
- For medium tiles (6 to 12 inches), a 1/4 inch or 3/8 inch notch trowel is usually suitable.
- For large format tiles (12 inches or more), use a 1/2 inch or larger notch trowel to ensure there is enough mortar to support the tile.
Refer to Manufacturer Guidelines
Check the tile manufacturer’s recommendations for trowel size and type of mortar. This information is usually found on the packaging or their website.
Adjust for Tile Backing and Conditions
If you are tiling over a particularly smooth or non-porous surface, you may need a larger trowel notch size to ensure proper mortar coverage.
Helpful Tips
- Practice on Scrap Tiles: If you are uncertain about the right trowel size, practice on a few scrap tiles to see how well the mortar spreads and adheres.
- Apply Evenly and Consistently: When applying the mortar, use the flat side of the trowel to spread a thin, even layer across the surface. Then, comb through the mortar with the notched side of the trowel at a consistent angle to achieve uniform ridges.
- Work in Small Areas: Only apply mortar to an area you can tile within 10-15 minutes to prevent the mortar from drying out.
- Use a Tile Levelling System: A tile levelling system will help ensure your tiles are properly spaced and the tops of all your tiles are even. For more information, read: SureReno’s Guide to: Installing Tiles Using A Tile Leveling System
Conclusion
By selecting the correct trowel and applying the mortar properly, you’ll ensure a strong bond between the tiles and the substrate, leading to a successful tile installation.
For a visual walk-through, check out this video by our friends at Custom Building Products: How to Set Tile the Right Way. It illustrates the proper method of applying mortar and the consequences of incorrect application.
If you would like to learn more about mortar, cement and concrete in general, check the Concrete Ontario resources area: Concrete Knowledge Base
Share this article:
