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

Method Surprised 50 Year Old Tiler! Fix Tiles Without Removing – Courtesy of The Maker

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.

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

How to tile over tile in a shower floor? – Courtesy of Renovation School
Re-waterproof bath/toilet floor – Singapore HDB flat – Courtesy of David OKY