SURFACE PREPARATION IGHT LEVEL Ltd, provides a beginner’s guide to subfloor preparation before tiling.
surface and will, therefore, require the application of a suitable floorcovering.
Smoothing and levelling compounds, can be used on a variety of substrates. However, when levelling timber floors, or screeds containing underfloor heating use of fibre- reinforced products may be considered. Remember to check carefully with the manufacturer and any data-sheets they produce to make sure they’re suitable for your subfloor.
Unlike other levellers which need to be used at a minimum of 10mm over timber, BAL Level Max can be used over timber at only 3mm. This means substantial cost savings and is great when only a minimal build-up is required for a level surface to tile to.
The majority of subfloors will also need priming before levelling and tiling. Floors such as concrete, cement:sand screeds, anhydrite screeds, cement:sand screeds with underfloor heated screeds and suitably constructed suspended timber floors. Priming ensures good adhesion of the smoothing and levelling compound, to the substrate.
Follow the manufacturer’s instructions when mixing (including water ratios etc), ensuring that a lump-free
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mixture is achieved. Once the required consistency is achieved, pour the mix over the prepared substrate and spread to the required depth using a suitable steel finishing trowel or long handled blade. Work the mixture well into the corners, edges and around projections. When you’ve finished spreading the mixture on the floor, pour some more mixture, spread that out and blend it in with the previous area.
Always allow the smoothing and levelling compound to set before laying your finished floor surface. Setting times can vary depending on your chosen product normally between four to 24 hours and is dependent upon your floor finish.
In wet areas allow a minimum of 24 hours before waterproofing the levelled screed with a suitable tanking system.
If you are inexperienced in subfloor preparation, we always recommend seeking further assistance from the manufacturer, whether by phoning their technical team or getting someone to visit your site.
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