Repairing drummy tiles and plaster by injection without removal

In some cases tiles or render that become hollow can be bonded back to the substrate without removing them. If you have the odd drummy tile or spot of drummy plaster you can re-bond it back to the substrate by injection of a low viscosity epoxy resin or acrylic emulsion such as bondcrete/hypobond. On ceramic tiles identifying wher...e the drummy spots are and then drilling through the grout in that location with a small masonry bit until you reach the substrate then use a syringe with the bonding agent and inject into the hole until it oozes back out. Sometimes multiple holes are required to achieve the desired result. if the floor has a cement screed then you must determine whether the drumming tiles are due to the tiles lifting from the adhesive or due to the screed debonding from the substrate. if the screed the tile are laid on is drummy then you must drill down through the screed until you hit the initial substrate and then inject the bonding agent. repairs of this nature are generally more effective on walls as gravity assists in ensuring the bonding agent finds where it needs to go. Success with screeded floors can be sometimes limited if the screed is poor quality and any repairs may be temporary and necessitate the removal of the whole floor to fix the screed. Repairing render is usually fairly simple providing the strength of the render is okay and you can simply drill around the perimeter of the drummy section along the top of it and inject the bonding agent. this can save thousands of dollars in remedial work.

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