Not sure which repair you need? Answer four quick questions
If your grout is cracking, you probably do not have a grout problem. You have a tile problem.

If your grout is cracking, you probably do not have a grout problem. You have a tile problem.

Recurring cracked grout can be a sign of tile movement. Check the tile and the underlying cause before regrouting. If an intact loose tile on a sound substrate is suitable for injection repair, secure it with Floor-Fix Pro Injectafix first, allow it to cure, then restore the grout. Cracked grout can also have other causes.

What to check before removing grout

Look for tile movement, damaged edges, lifting, damp and the pattern of cracking. Compare the sound of nearby tiles, but do not treat a hollow sound as proof of a failed bond. Grout condition, movement joints and the substrate may need assessment.

Finding Repair direction
A loose intact tile over a sound substrate with an accessible void Check whether Injectafix injection repair is suitable; rebond before regrouting.
Stable tiles with damaged grout Assess why the grout failed and choose a compatible grout repair.
Cracked-through tiles, tenting, rot, active damp or widespread movement Investigate the installation and underlying fault before applying adhesive or grout.

Why grout alone does not fix a loose tile

Grout fills the joints between tiles. The adhesive beneath the tile provides the bond to the substrate. When a tile moves, simply filling the surrounding grout joint does not restore that bond, so the crack may recur.

Repair a suitable loose tile, then the grout

Step 1: Diagnose the movement

Check the tile, surrounding joints and substrate condition. Proceed with injection repair only when the tile is intact, the substrate is sound and the void is accessible. Investigate other causes if these conditions are not met.

Step 2: Prepare the access point

Follow the instructions for your Injectafix format to prepare and clean a grout-line access point. Check for concealed services and waterproofing before drilling, and do not drill into the subfloor.

Step 3: Apply the adhesive

Use a caulking gun with Injectafix Pro / Precision, or use the no-gun Easy Squeeze tube. Apply as directed without excessive pressure and clean excess immediately.

Step 4: Weight and cure

Weight the tile as instructed and keep it undisturbed with traffic off for at least 24 hours as directed. Confirm the bond has cured and the tile is stable before continuing.

Step 5: Restore the grout line

Repair the joint with a compatible matching grout such as Twist & Grout, following its preparation and curing instructions. If cracking or movement continues, reassess the cause rather than repeatedly filling the same joint.

Choose the products for the job

Injectafix Pro 300ml / Precision uses a caulking gun. Easy Squeeze 300ml contains the same formula in a no-gun tube. Twist & Grout is for suitable grout restoration after the tile is secure.

Common questions

Does cracked grout always mean loose tiles?

No. Tile movement is one possible cause. Inspect the grout, tile and installation before deciding on a repair.

Can I finish the whole repair in 30 minutes?

Do not confuse application time with curing time. An injection repair needs the instructed cure period before grout restoration and return to use.

Must every hollow-sounding tile be injected?

No. Sound is a reason to investigate, not a diagnosis. Confirm the condition and cause before choosing a treatment.

Read the detailed loose-tile guide or find the right repair route.