ON THE RIGHT LEVEL Norcros Adhesives discusses the importance of the leveller in every contract flooring job.
Concrete or screeded floor surfaces will generally require levelling with a preparatory levelling compound to ensure the floor is sufficiently flat to receive a finished floorcovering. The leveller acts as an intermediate layer, on to which tiles, or other types of covering can be applied.
Concrete must be at least six weeks old before the application of a screed, levelling compound or tiled finish, allowing potentially damaging movement caused by drying shrinkage in the concrete to have taken place and not transfer through to other layers. It should be clean, dry and free from dust or contaminants which may act as a release agent and prevent the screed, leveller or adhesive from bonding to the concrete.
When applying a levelling compound on to impervious substrates such as existing tile finishes, Norcros Key Bond Gritted Primer should first be applied to provide a rough textured surface on to which the levelling compound or adhesive can bond.
Norcros Adhesives offers a one-stop shop for all stages of the tiling process. This includes surface preparation and primers, as well as an expanding range of levellers, adhesives and grouts. The company has a number of different levelling products for different applications. The newest addition to its range is also its most environmentally friendly product yet. Norcros Pro 30 Fast Track Levelling Compound contains recycled crushed glass, which replaces quarried sand.
It is a flexible, single-part leveller that’s suitable for use from 2mm to 30mm in a single application, without the need for additional aggregate. It is ready to tile after just 45 minutes, and can receive impervious floorcoverings after 90 minutes, allowing early foot traffic and fast-track tile fixing.
Norcros Pro 30 Fast Track Eco is also suitable for encapsulating under-tile heating mats and cables, protecting the heating elements during the tile-fixing process as well as providing a level surface for tiling. It is suitable for use on timber floors which have been overlaid with 15-18mm WBP or marine-grade plywood.
One of the most important recent technical innovations from Norcros Adhesives has been the development of Reinforced
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Polymer Technology (RPT). The main benefit gained from the incorporation of RPT is that the polymer strands give reinforced flexural and bond strength, in addition to providing improved crack bridging, anti-shrinkage and thermal ageing properties.
RPT technology has been introduced into Norcros Pro 50 Levelling Compound. This is a single part, fibre-reinforced self-smoothing levelling compound, suitable for use from 3mm to 50mm in one application without the need for additional granite chippings. It is ideal for levelling a variety of substrates including concrete, screed, flooring grade asphalt, terrazzo and quarry and vinyl tiles. It can be used with undertile heating mats and on overlaid timber floors.
“When applying a levelling compound
on to impervious substrates such as existing tile finishes, primer should first be applied to provide a rough textured surface on to which the levelling compound or adhesive can bond.”
Norcros Pro 10 Levelling Compound is a single part polymer- modified self-smoothing floor levelling compound, suitable for levelling a variety of substrates including concrete, cement: sand screed, flooring grade asphalt, terrazzo and existing quarry and vinyl tiles. It is ideal for use with under tile heating mats where it may be used to cover the wired elements, providing a level substrate to tile to and also protecting the heating elements during the fixing process.
Its excellent levelling and flow properties make it ideal for preparing sub floors prior to fixing ceramic, porcelain or natural stone tiles. It has a setting time of 3 hours permitting early foot traffic and fast track tile fixing. The product is designed to be used up to 10mm thick in one coat, or with the addition of single size granite chippings up to 20mm.
www.nxadh.co.uk www.tomorrowscontractfloors.com
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