When it comes to outdoor flooring, porcelain tiles have gained immense popularity due to their durability, low maintenance, and stunning aesthetics. To ensure the longevity and stability of porcelain paving, selecting the right grout is crucial. In this blog, we will compare two prominent outdoor grout options for porcelain tiles: the Pavetuf porcelain grout and the GftK ranges, examining their features, benefits, and suitability for various applications.
When selecting a porcelain grout, there are several key features that one would want to prioritise for a successful and long-lasting tile installation. First and foremost, excellent stain resistance is crucial to maintain the grout's pristine appearance in outdoor and high-traffic areas prone to spills and dirt. Additionally, water repellency or water permeability is essential to prevent moisture infiltration, especially in outdoor spaces subject to weather changes and frost. A grout with durability and strength ensures the grout lines remain stable and intact, providing structural support and resistance to wear and tear. Ease of application is also desirable, making the installation process smoother and more efficient for both professionals and DIY enthusiasts. Moreover, a range of colour options enables one to choose a grout that complements the tiles, enhancing the overall aesthetics of the space. Finally, UV stability to resist colour fading from sunlight exposure may also be significant considerations in selecting the ideal porcelain grout.
Recommended Product Options
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Pavetuf Jointing Grout - Add water to premixed powder |
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Colour Options: |
Black, Grey, Buff |
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Tub Size: |
9kg, comprising 3 x 3kg individual bags |
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Typical Coverage: |
Approx. 40 square metres (coverage based on 600x600mm size paving with a 20mm deep x 5mm wide joint) |
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Suitability: |
Porcelain & ceramic only. Internal and external use, flooring, paving, driveways & walls |
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Features: |
Rapid setting, mould resistant, suitable with underfloor heating, water repellant, for joint widths 1-15mm, stain resistant, fine non-granular appearance |
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Installation Method: |
Mix powder with clean water to form a thick creamy paste using a slow speed drill and paddle. Grout is usable for around 30-40 minutes. Work into the joints using a grouting trowel, squeegee or sponge. Allow to set for 30 minutes and clean off tile surface with a damp sponge. |
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Ready for Use: |
Tiled and paved areas ready for light foot traffic after approx 3 hours and full traffic after 24 hours. |
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User Guide
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GftK vdw 815 plus - Epoxy 2 Part Paving Mortar |
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Colour Options: |
Stone Grey, Natural Sand, Basalt |
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Tub Size: |
10kg, comprising 1 part aggregate and 1 part binder |
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Coverage: |
Approx 10 square metres (coverage based on 600x600mm size paving with a 20mm deep x 5mm wide joint) |
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Suitability: |
External use, paving including porcelain and natural stone and light vehicular use |
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Features: |
For joint widths >3mm, stain resistant, fine sand-like appearance, can be installed in low temperatures and rain |
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Installation Method: |
Pre-mix the aggregate, then add the binder and mix with a drill with paddle attachment. No water should be added. Apply immediately onto a pre-wetted surface and squeegee into the joints, whilst keeping the area wet with a hose. Remove any excess immediately with water. |
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Ready for Use: |
Paved areas ready for light foot traffic after around 24 hours or until no longer tacky. Suitable for vehicular use after 3-5 days. |
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GftK vdw 850 plus - Epoxy 2 Part Paving Mortar |
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Colour Options: |
Stone Grey, Natural Sand, Basalt |
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Tub Size: |
25kg, comprising 1 part resin coated aggregate and 1 part hardener |
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Coverage: |
Approx 45 square metres (coverage based on 600x600mm size paving with a 20mm deep x 5mm wide joint) |
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Suitability: |
External use, paving including porcelain, natural stone and concrete. Medium vehicular use include small commercial vehicles |
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Features: |
The strongest paving grout available, suitable for paving refurbishment. Joint widths from 5mm upwards |
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Installation Method: |
Pre-mix the resin coated aggregate, then add the hardener and mix with a drill with paddle attachment. No water should be added. Apply immediately onto a pre-wetted surface and squeegee into the joints, whilst keeping the area wet with a hose. Remove any excess immediately with water. |
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Ready for Use: |
Paved areas ready for light foot traffic after around 24 hours or until no longer tacky. Suitable for vehicular use after 3-5 days. |
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Different Types of Porcelain Jointing Mortar
Epoxy grout, brush-in mortar, and slurry grout are three different materials used for filling gaps and joints between porcelain paving tiles. Each type of grout has its own characteristics, advantages, and ideal applications:
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Epoxy Grout - GftK 815 and 850:
- Composition: Epoxy grout is a two-part mixture consisting of epoxy resin and hardener. When combined, it forms a durable and chemical-resistant material.
- Advantages:
- Exceptional Strength: Epoxy grout is known for its high compressive and tensile strength, making it suitable for heavy traffic areas and areas subject to heavy loads.
- Water Resistance: Epoxy grout is highly water-resistant, making it ideal for outdoor applications and areas exposed to moisture, such as pool decks and showers.
- Stain Resistance: It is resistant to stains, chemicals, and most household cleaners, making it easier to maintain a clean appearance.
- Minimal Shrinkage: Epoxy grout experiences minimal shrinkage during curing, reducing the risk of gaps forming over time.
- Ideal Applications: Epoxy grout is well-suited for areas where durability, water resistance, and stain resistance are crucial, such as outdoor patios, pool decks, and high-traffic commercial spaces.
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Brush-In Mortar (Dry Mix Jointing) - not shown above as not normally used for porcelain:
- Composition: Brush-in mortar is a mixture of sand, cement, and sometimes polymer additives for enhanced flexibility.
- Advantages:
- Cost-Effective: Brush-in mortar is generally more cost-effective than epoxy grout.
- Flexibility: It allows for slight movement and expansion in the tiles, making it suitable for outdoor areas subject to temperature variations.
- Aesthetics: Brush-in mortar provides a more traditional and natural look, which some homeowners prefer, although it usually has a grainy look which is sometimes considered too rustic for the sleek appearance of porcelain paving.
- Ideal Applications: Brush-in mortar is commonly used in outdoor applications where a more budget-friendly and flexible option is desired, such as garden paths, driveways, and less busy areas.
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Jointing Grout (Traditional Paste Grout) - Pavetuf Jointing Grout:
- Composition: Jointing grout, also known as traditional cementitious grout (although it sometimes uses an alternative to cement), is a mixture of cement (or calcium sulphate), sand, and water. It is a common choice for filling gaps between tiles, including porcelain paving tiles.
- Advantages:
- Versatility: Jointing grout is suitable for a wide range of tile types, including porcelain, ceramic, and natural stone.
- Cost-Effective: It is generally more affordable than epoxy grout, making it a popular choice for various tile installations.
- Ease of Application: Jointing grout is easy to mix and apply, making it accessible to both DIY enthusiasts and professionals.
- Adequate Strength: While not as strong as epoxy grout, cementitious grout provides sufficient strength for most residential and light commercial applications.
- Limitations:
- Water Absorption: Traditional cementitious grout is somewhat porous and can absorb water, making it susceptible to staining and mildew growth if not properly sealed.
- Stain Susceptibility: Without proper sealing, jointing grout can be prone to stains from spills and other contaminants.
- Cracking: Cementitious grout can experience slight shrinkage and may be more prone to cracking in certain conditions, such as temperature fluctuations or movement in the substrate.
- Ideal Applications: Jointing grout is commonly used in various indoor and outdoor applications, including floors, walls, countertops, and backsplashes. It is a suitable option for areas with moderate foot traffic and where water exposure is minimal.
The choice between epoxy grout, brush-in mortar, slurry grout and jointing grout for porcelain paving depends on factors such as the specific project requirements, budget constraints, desired aesthetics, and the expected level of traffic and exposure to water and chemicals. For high-traffic areas or spaces exposed to water and harsh conditions, epoxy grout is typically the preferred choice due to its superior strength and durability. For outdoor areas with moderate traffic and more budget-conscious projects, brush-in mortar or slurry grout can be suitable options.
Conclusion
In summary, both the Pavetuf Jointing Grout and the GftK vdw 815 plus and vdw 850 plus offer outstanding features and benefits. The Pavetuf grout, available in various colours, is rapid-setting, stain-resistant, and suitable for joint widths from 1-15mm, making it ideal for both internal and external use. On the other hand, the GftK vdw 815 plus provides a fine sand-like appearance, is suitable for larger joint widths, and can be installed in low temperatures and rain. The GftK vdw 850 plus stands out as the strongest paving grout available, with its suitability for medium vehicular use and joint widths from 5mm upwards.
To conclude, the choice of grout will depend on specific project requirements, budget considerations, desired aesthetics, and the expected level of traffic and exposure to water and chemicals. With the right grout selection, your porcelain paving will not only retain its beauty but also endure the tests of time and weather. As you embark on your outdoor flooring journey, consider these grout options to ensure a successful and lasting porcelain tile installation that will elevate the appeal and functionality of your outdoor space for years to come.
