Laying Floor ScreedsLaying Floor Screeds
When laying a floor covering such as tiles, floor screeder, timber, or vinyl, the ground screed layer must be laid accurately. This ensures that the final floor finish can withstand its intended usage, without suffering from cracking or lifting in places due to unsightly dips or uneven surfaces. It also helps to create a level surface, allowing the chosen floor finishing material to sit flat and avoid sagging.
In addition, a quality screed is insulating, helping to reduce the impact of noise and vibration between the structural floor slab and the final flooring material. This means that commercial or industrial environments can be made to feel more comfortable for employees and customers.
Meet the Floor Screeder: What You Need to Know
Screeds are usually comprised of a mix of cement and sharp sand, although in some cases, coarse aggregates may be added to create a more robust layer. They are commonly used as a defined layer to install the final floor covering, and can also be left bare for an aesthetic effect in some environments such as warehouses.
A standard sand and cement screed mix can be applied to a thickness of between 25mm (bonded) and 50mm (unbonded). Some manufacturers produce pumpable flowing screed compounds that are based on anhydrite and which provide very level finishes. These are generally quicker to apply than a traditional sand and cement screed, and can be laid up to 2,000m2/day. They can be used as a bonded or unbonded layer, and are particularly useful in conjunction with underfloor heating systems.
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