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A house with original tiles, joints split. The joints are gray. How to redo joints with preferably easy products? I am widowed and alone to renovate and with very little means.

This is probably because your joints were made with cement mortar. Clean the joints thoroughly with a CT20 cement-type paint remover found in DIY superstores. Repeat your joints with the slip (liquid mortar used for grouting tiles). Prepare it according to the manufacturer's instructions. Spread the product on the tiles with a rubber squeegee, always work diagonally to avoid damaging the joints. When the slip is barely dry, clean the surface with a damp sponge that you will rinse frequently.Do not let the traces dry: if necessary to several cleaning, possibly with a solution anti-veil cement.

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