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As long as the tiles are flat and in good condition, and there are no hollow or drummy tiles, then you can lay hybrid vinyl flooring directly over floor tiles. It is 100 per cent waterproof and ideal for use in bathrooms and laundries.
This guide shows you how you can lay hybrid vinyl plank flooring.
When considering whether stick-on vinyl might be cheaper than hybrid vinyl, remember that with stick-on vinyl there are additional costs involved with priming, self-levelling and priming again. By the time you've prepared the surface for the cheaper stick-on product, hybrid vinyl could be the more inexpensive option.
Here's an installation guide for stick-on vinyl, which takes you through the process to level tiles. - MitchellMc
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