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The ground layout is an important preliminary step on which the harmony of the finished tile often depends. Is it from an angle, from the middle of the room, or from the main entrance to the room? These are questions that are invariably asked and which often leave one puzzled.

Steps

1. New house or old house?
2. Ground tracing

## New house or old house?

In a new house where the walls are perfectly square, you can start from an angle provided you are sure of the regularity of it. It is not necessary to make any trace. This solution has the merit of being simple; it does not guarantee, however, that one will not have to make cuts and, above all, that one will not have to end up with a tiny fraction of tile at the level of the door, which would be disastrous.

In an old house, where the walls are rarely squared, there is no question of starting from a corner with a whole tile. Draw a line starting from the middle of the entrance door (see diagram opposite) and one or more perpendiculars so as to share the room in a certain number of squares or rectangles (in general, it is enough to draw two perpendiculars).

In a bathroom, new or old, it is often aesthetic to align a seal on the angle of the dressing of the bathtub. In that case:
- draw a line starting from the corner of the cladding with the chalk line;
- draw a perpendicular so as to keep a whole tile along the cladding (use for that a square of mason in
guiding you on a straight slat to draw the line).

Lay the tiles "blank", that is to say without glue, to get an idea of ​​the distribution of tiles and especially cuts to achieve (do not forget to take into account the space of the joints!). You can start from an entire tile, provided that the tile portion at the other end of the room is not too small (in this case, it is best to balance the cuts).

## Ground tracing

Leave the middle of the entrance door and trace the axis of it with a chalk line (just pinch it to deposit the chalk line on the ground).

With a perfectly straight long ruler (preferably metal), draw one or more perpendiculars.

If you are tiling around a tub, first determine the line starting from the corner of the tubing and draw the line to the chalk line.

Keeping an entire tile along the skin, determine and draw a line perpendicular to the first one.

(photos / visuals: © DIY-prod, except special mention)

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