Waterproofing wet rooms in your house is essential, given that extended exposure to moisture can degrade the structure of your home and lead to costly maintenance bills. Because of their versatility and practicality, tiles are often specified in these areas. They do however have a weak spot, which is the grout that separates them - a potential area where grout seepage can occur.
Grout is a mixture of water, cement, and sand - a mortar that is used to fill cavities, typically between tiles. Because tiles are often laid in wet rooms or swimming pools, waterproofing them is crucial to ensure their longevity. Water can seep through unsealed grout and if left unchecked can collect and move via capillary action to affect large areas behind the tiles.
The type of tiles you utilise will determine if you have to seal them and the grout - or just the grout. Glazed ceramic tiles do not require sealing, so only the grout needs treatment. This is typically achieved using a liquid membrane or penetrating sealer. The latter are the most widely used on wall tiles, with silicone or latex agents that penetrate the grout and render them impermeable.
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