In order to determine where to place the profiles it is necessary to inspect the subfloor because day joints in the screed or pre-existing compound joints will often be the deciding factor. Many of these existing joints are approximately 6 meters apart ( British Standard guideline is a max of 10 meters) which can often cause problems with tile layouts leaving some awkward cuts. Please contact us to discuss this in more detail. Some subfloors are monolithic and have no subdivision. In these situations the movement joint position can be adjusted to best suit the aesthetic layout of the tiling following the 10 meter guide (see section on heated floors).
Some basic rules:
• If there is a joint in the subfloor it must be followed through exactly in the tiled surface. Ignore this at your peril!
• The maximum area of tiling must not exceed 10 meters x 10 meters (see section on heated floors).
• If the floor section exceeds more than 2 meters x 2 meters then a perimeter joint must be installed.
• Tiling in corridors must be protected by being subdivided with a minimum of 10 meters between the joints.
• Perimeter joints must protect obstructions within the floor area such as pillars, fixed plant or features.
As a starting point use the pre-existing joints in the subfloor for your layout but don’t forget the perimeter requirements. A joint in the subfloor or a change in materials (such as concrete or screed to timber) is a situation that requires a movement joint at that point. A kitchen extension or the addition of a sunroom are typical situations where vertical movement occurs.