Preventing tile picture framing
When most people think of picture framing, it's usually in a positive light. Protecting valuable memories in frames on the home wall is sentimental by nature, and something that is done to help preserve a momento from a special occasion.
However, when it comes to picture framing on your stone tiles, this is a different story entirely. Tile picture framing is when the color from the grout used begins to seep into the coloring of the tile and creates discoloration around the sides of the tile.
This usually affects all four sides of the tile and comes in a few millimetres deep, producing an effect similar to that of a frame.
There are a number of reasons that this could occur for a tile. One of the most common is people grouting their tiles before they've been adequately sealed. By grouting an unsealed tile, you run the risk of having the stone pull some of the color from the grout, staining the tile and producing the framing effect.
The best way to avoid this is to seal all your tiles with a impregnating sealer prior to grouting. It is essential that the sealer is cured and that the tiles are completely dry before applying the grout to the area. Leaving the tiles overnight to let the sealer cure should be enough to ensure the headache and stress of picture framing on your newly-invested tiles.
Furthermore, some stones and tiles are more susceptible to framing by nature, due to their porosity. Stones like grey and black basalt, bluestone and limestone should all be carefully and thoroughly sealed before you undertake grouting, to ensure that the colour doesn't soak into their edges.