Bathrooms and decks, built the WEDI way…
The best choice in bathroom design
The WEDI Building Panel is a waterproof tile underlayment for walls and floors, manufactured in Germany. It consists of an extruded, polystyrene core and is covered in a fiberglass mesh and polymer modified cement resin coating.
The blue foam core is closed cell, extruded polystyrene that does not allow the transfer of water and retards water vapour transmission.
The alkali resistant glass mesh adds strength and rigidity to the building panels. The cement coating allows for adhesion as a bonding surface to any standard or modified tile adhesive on cement or epoxy basis. The board is engineered to be used in interior applications for the installation of ceramic tile on walls, floors, counter tops and many more applications where traditional backer boards are used.
The WEDI Building Panel will not provide a thermal or fire barrier. It will not add anything to a fire, as the cells of the foam will collapse due to extreme temperatures above 175°F. Where a one-hour firewall is required, the WEDI building panel should be applied over a surface that can provide such a rating (such as certain drywall systems).
The WEDI Building Panel is not engineered to be used as a sound deadening underlayment. It will lower airborne sound but, due to its firm and full surface contact bond to substrate and tile, will not reduce impact sound.
Conventionally, “green products” are fully organic and sustainable. WEDI foam based products are therefore not “green”. However, the process of manufacturing is engineered to not harm our environment. Extrusion agents used are CFC free and the product obtained a “Global Warming Potential “rating as per UN charts of 1. Global-warming potential (GWP) is a relative measure of how much heat a greenhouse gas traps in the atmosphere. It compares the amount of heat trapped by a certain mass of the gas in question to the amount of heat trapped by a similar mass of carbon dioxide. A GWP is calculated over a specific time interval, commonly 20, 100 or 500 years. GWP is expressed as a factor of carbon dioxide (whose GWP is standardized to 1). For example, the 20 year GWP of methane is 72, which means that if the same mass of methane and carbon dioxide were introduced into the atmosphere, that methane will trap 72 times more heat than the carbon dioxide over the next 20 years. The substances subject to restrictions under the Kyoto protocol either are rapidly increasing their concentrations in Earth’s atmosphere or have a large GWP.
WEDI foam based products also protect organic structural parts of buildings such as wooden parts against rotting, replacement and mould, thereby actively prolonging the lifetime of an installation, resulting in a savings of resources and energy.
In addition, WEDI foam based products add insulation and can eliminate heat leaks of building envelopes insulation and help conserving energy. WEDI building panel can also be used actively on facades to add to the efficiency of older insulated walls or standard Batts insulation. Especially also in areas often subject to insufficient insulation and heat loss such as window or door frame areas.
Minimum 1/8” thick WEDI Building Panel functions as an excellent substrate for most flooring applications. WEDI Building Panel has been rated for heavy-duty commercial use by the Tile Council of North America (TCNA) using the industry standard known as the Robinson Floor Test.
It can be applied over a wooden or concrete subfloor. When applied over plywood, the recommended joist spacing is 16″ on centre, 5/8″ or greater plywood with no deflection in the subfloor greater than L/360 as outlined by the TCNA, following local building codes or the IRC. If applied over a cement subfloor the slab should be fully cured and free of debris. The board will function as a crack bridging membrane because cracks in the cement subfloor will not transfer through the foam as easily as through other inelastic tile backerboards.
The WEDI 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 1/2″, 5/8″, or 1″. The particular thickness is dependent solely upon the desired effect that the contractor wants to achieve. If a contractor is applying WEDI Building Panels over a gypsum product, the 1/2″ board will most likely be used as this will allow for the trim pieces of ceramic tile to cap where the WEDI Building Panels end.
Yes, WEDI is the preferred choice of backerboard worldwide for more than 29 years when it comes to steam rooms. WEDI panels are not only waterproof but also function as a vapour retarder