Tiled Floor issue

[MiniMonty]

Hi all,
I have a tiled (Minton) hallway and where it meets the parquet floor of the kitchen a few tiles started to "sag". Took them up to discover NOTHING underneath ! (see pictures).

Now confused about what to fill the void with / how to refit the tiles.
All and any advice much appreciated.

Best wishes
Monty

Untitled

• MiniMonty
• 17 Nov 2014
• 1

Untitled

• MiniMonty
• 17 Nov 2014
• 1

Untitled

• MiniMonty
• 17 Nov 2014
• 1

Untitled

• MiniMonty
• 17 Nov 2014
• 1

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[TheVictorian]

You could just fill it with concrete a few mil short of the bottom of the tiles and re-tile on that.

However, I'm more interested in what has caused this. Can you take a photo down the hole looking left and right? I'm thinking a drainage leak, rat problem or just settlement of the soil but it is a bit unusual and I'd want to be sure that the rest isn't going to collapse...

 

[ree]

As the above post.

Pics of the entryway to the right, and outside pics of the walls around the "porch"/hallway area would help.

You could inspect the external walls at ground level looking for rodent entrance holes or damaged air bricks. Another possibility is a broken drainage pipe somewhere in the vicinity. Is there a hall WC nearby, or a gulley on the outside?

Thing is with rodents there would be a definite smell and signs of droppings. A broken sewer or waste would also smell, and perhaps show damp.

If the exterior brickwork beds are visible then look for any dipping or sagging that might indicate a little subsidence.