Grout Injection & Re-tiling
Grout Injection
Small areas of hollow tiles may be repaired without the need to remove the tiles:
-Identify spots of hollow tiles using a tapping test
-Mark the locations clearly
-Drill holes within the joint width closest to the hollowness
-Vacuum clean dust
-Inject grout following similar concept to that for PU injection
-Continue to inject until grout is seen to emerge from neighbouring holes
-Repeat the process for other areas
Re-tiling
Patching on the affected localised spots should suffice. If the surface is badly affected, re-levelling and re-tiling may be the most suitable remedy.
The screed is the crucial part before the tiling in order to achieve the desired gradient. A screed can be defined as a layer of well-compacted material applied in-situ to a structural base or other substrate and finished to a designated level.
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It serves:
– as a smooth, flat surface to a correct level for bedding of tiles
– as a protection for the waterproofing coating
– to provide falls to drain water off
– to accommodate service pipes
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