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Q 1.What is a Foshan Just Top Building Panel?
A Description:
The Foshan Just Top Building Panel is an advanced, all-in-one tile underlayment designed for both walls and floors. It is constructed with a 100% waterproof extruded polystyrene (XPS) foam core, which is then reinforced with a fiberglass mesh and coated with a modified cement surface. This unique composition provides superior strength, thermal insulation, and an excellent bonding surface for tile, stone, or mosaics. Unlike traditional backer boards, Hydroblok is completely waterproof, making it the ideal choice for wet areas like bathrooms, showers, and kitchens.
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Q 2.Why is Foshan Just Top Fully Waterproof, Not Just Water-Resistant?
A Description:
The key difference lies in the core material. Foshan Just Top panels are made using a special extrusion process that creates a dense, closed-cell XPS foam matrix. These cells are so tightly packed that water cannot penetrate or pass through, resulting in a truly waterproof barrier. In contrast, many "water-resistant" boards are made from compressed materials that can still absorb moisture over time through capillary action. Foshan Just Top's impermeable nature prevents water damage, mold growth, and rot, ensuring long-lasting protection for your building structure.
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Q 3.What are the Advantages of a Foshan Just Top Prefabricated Shower Pan?
A Description:
The Foshan Just Top Shower Pan revolutionizes shower construction by eliminating the need for a traditional mortar bed and plastic liner. This prefabricated, tile-ready pan is made from 100% waterproof XPS foam and comes pre-sloped to ensure proper drainage to its integrated drain system. The main advantages are significant time and labor savings — installation takes about an hour compared to a full day for traditional methods — and unparalleled reliability. Since it's a single, waterproof unit with no seams or weep holes to clog, it completely eliminates the risk of hidden leaks and mold growth associated with conventional shower bases.
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Q 4.What is the Foshan Just Top building panel?
A Foshan Just Top building panel serves as a waterproof & Insulation tile underlayment designed for both walls and floors. Foshan Just Top wallboard products are built with the same high quality construction as the rest of our foam products with a 100% waterproof XPS foam core, covered by fibreglass mesh and then coated in a modified cement coating to provide superior strength and an excellent bonding surface for your tile, stone, glass or mosaics and stone on walls, floors, countertops, and other areas traditionally requiring backer boards. Available in dimensions such as 600 x 1200mm, 914mm x 1524mm, 600 x 2440mm, and 1220 x 2440mm, the panels come in various thicknesses ranging from 4mm to 50mm.
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Q 5.What is the XPS?
A XPS, or extruded polystyrene, is a foam known for its waterproof properties. It's made through a process that creates a dense matrix of closed cells. These cells are packed so tightly that water can't get in, and the insulating air can't escape. The foam is then reinforced with a glass mesh and coated with a cement resin for added strength. This waterproof feature makes XPS a popular choice for insulation and waterproof in various applications.
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Q 6.Who produces Foshan Just Top building panel?
A Foshan Just Top building panels are produced by Foshan Just Top 's branches located in China and Thailand. The China branch was established in 2010, while the Thailand branch was built in 2023.
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Q 7.Why is the Foshan Just Top building panel waterproof as opposed to “water resistant” backer boards?
A The Foshan Just Top building panel is fully waterproof, not just water-resistant, because of how it's made. Unlike regular compressed foam, Foshan Just Top panels use a special extrusion process that creates a single piece of foam with no gaps. This closed-cell structure means there are no spaces for water to seep through, making it completely waterproof. Unlike some other backer boards, Foshan Just Top doesn't let water in and has no capillarity, so it won't absorb water either.
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Q 8.What sizes are available?
A T he panels come in various thicknesses ranging from 4 mm to 50mm .
The available size is 914mm x 1524mm, 914mm x 1220mm, 1220mm x 1524mm, 1220mm x 2440mm, 600mm x 2400mm, 600 x 1200mm.
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Q 9.How much do the Foshan Just Top building panels weigh?
A The weight of Foshan Just Top building panels varies based on the thickness. For the 914mm x 1524mm x 12.7mm size, the weight is 4.5 Kgs.
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Q 10.Does the Foshan Just Top building panel have an R-Value?
A Yes, the Foshan Just Top building panel does have an R-value. The R-value depends on the thickness of the panel, increasing at a rate of 4.3 per 1 inch of thickness.
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Q 11.Should I leave space for expansion joints between Foshan Just Top building panels when installing them on the floor?
A No, Foshan Just Top building panel is stable and will not shrink or expand over time. All Foshan Just Top building panels should be butted together. An expansion joint around the perimeter of the floor should be considered, leaving a gap of 1/8" to the surrounding walls to better resist structural movement. Consider the use of expansion joints in the tile assembly over Foshan Just Top building panels according to recommendations found in the Tile Council of North America’s (TCNA) Handbook for Ceramic Tile Installation.
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Q 12.Can the Foshan Just Top building panel be installed on walls?
A Foshan Just Top building panel can be applied directly to wood or metal studs, over gypsum board (green board or drywall), masonry walls and existing ceramic tile. The recommended thickness for a wall application is 10mm, 12mm, 15mm, or 25mm. The particular thickness is dependent solely upon the desired effect that the contractor wants to achieve. If a contractor is applying Foshan Just Top building panels over gypsum board, the 12mm thick panel will most likely be used as this will allow for trim pieces of ceramic tile to cap where the Foshan Just Top building panels end.
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Q 13.Can I attach Foshan Just Top building panels directly to the studs?
A Yes, you can install minimum 12mm thick Foshan Just Top building panels directly onto wood or metal studs using just a few fasteners per sheet (1 Foshan Just Top fastener per 1 ft. of stud). When attaching Foshan Just Top panels directly to studs, you can use the 5/8" thickness if the ceramic tile will have a flush or surface finish. If you prefer a "floated" look or if the framework spacing is over 19" on center, you can apply the 1" thickness directly to studs. It's important that the framework is loadbearing and serves as a suitable substrate.
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Q 14.Can the Foshan Just Top building panel be installed on walls?
A Yes, Foshan Just Top building panel is a reliable choice for steam rooms, but Waterproofing Membrane (minimum 0.5 PERM rating) needs to be added on top of Foshan Just Top panel to create one more protection in the high
Notes: The temperature in a steam room typically ranges between 100°F to 120°F (38°C to 49°C). Steam rooms are designed to create a hot and humid environment, and the temperature can vary based on personal preferences and the specific design of the facility.
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Q 15.Can I use the Foshan Just Top building panel in an exterior application?
A While the Foshan Just Top building panel is suitable for exterior applications, direct exposure to sunlight is not recommended. Instead, it is advised to utilize Foshan Just Top building panels behind the surface material, acting as heat insulation for roofs and exterior walls.
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Q 16.How is the Foshan Just Top building panel cut?
A The Foshan Just Top building panel can be easily cut using a utility knife, and there's no need for scoring as the blade can effectively cut through the material. Alternatively, mechanical saws and handsaws are also suitable tools for cutting Foshan Just Top building panels.
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Q 17.The Foshan Just Top building panel can be dented when pressure is applied. Will this cause a problem after the ceramic tile is adhered over these dents?
A Applying pressure to the Foshan Just Top building panel can result in dents. While these dents won't recover their original shape due to the compression of foam cells, adhering ceramic tiles over them using polymer-modified thinset mortar addresses the issue. The mortar fills the voids created by the dents and sets appropriately. The waterproof properties of the Foshan Just Top building panel are maintained unless the panel is completely punctured through the foam core. In situations where puncturing is inevitable, such as at attachment points with nails or screws, it's crucial to apply Foshan Just Top joint sealant to ensure waterproof integrity.
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Q 18.Is the Foshan Just Top building panel toxic?
A No, the Foshan Just Top building panel is non-toxic. Its foam is inert and inorganic, ensuring that it does not produce carcinogens when handled or cut. The manufacturing process uses a CFC-free blowing agent. Additionally, Foshan Just Top has successfully passed tests for Persistent, Bioaccumulative, and Toxic (PBT) Chemicals under the US EPA Toxic Substances Control Act (TSCA) Section 6, as well as VOC (Volatile Organic Compounds) testing.
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Q 19.How do I make tile repairs on Foshan Just Top building panel installations?
A When repairing ceramic tiles on Foshan Just Top building panel installations, follow a meticulous process. Begin by cutting grout and tiles with precision. Utilize a sturdy putty knife to remove tiles and mortar chips carefully.
Take caution not to cut entirely through the panel, as this could compromise its waterproofing. Avoid using hammers or tools that expose the Foshan Just Top building panel assembly to excessive vibration and impact pressure. Such actions may result in the opening of seams and reinforcement, posing a risk to the waterproof application In the event that a complete Foshan Just Top building panel needs replacement, follow these steps:
① Cut out the damaged area to match the size of the ceramic tile, using a utility knife with an extended blade for a precise 45-degree mitered edge.
② Cut a replacement Foshan Just Top building panel piece with mirrored 45-degree mitered edges and insert it into the cutout after applying a bead of Foshan Just Top joint sealant around the contact seams.
③ Seal the four seams carefully with additional Foshan Just Top joint sealant, smoothing it flat with a putty knife. Before applying the sealant, tape the surrounding ceramic tile to avoid any contact.
④ Allow the Foshan Just Top joint sealant to cure for 30 minutes.
⑤ Back butter a new tile and firmly press it onto the repaired Foshan Just Top building panel, ensuring proper bonding with the polymer-modified thinset by pressing downward and moving the tile up. Finally, grout the area to complete the repair.
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Q 20.Is the Foshan Just Top building panel strong enough for a ceramic tile installation?
A It can be used as an underlayment on floors in residential applications such as kitchens, living rooms, bathrooms or stairways. In addition, spaces such as office buildings, breweries or anywhere that there is heavy duty use.
When installed on walls, Foshan Just Top building panels can support any standard ceramic tile or natural stone up to 23 pounds/sq. ft(111Kgs/sqmt). On ceilings, it can bear up to 18 pounds/sq. ft(87kgs/sqmt). Foshan Just Top building panel will not fail under normal conditions, including moderate impact.
