[salallan]

Leaking Roof made from Slabs, any idea what can be used to fix this. The slab slides down and in strong rain the water gets behind the other slabs and water runs into the house.

 

[Nealtw]

We will need pictures for this.

 

[mark sr]

What kind of slabs??

 

[salallan]

Slate Roof Tile in Graphite, grey colour, common in the UK

 

[mark sr]

The tiles shouldn't be sliding down. They need to be re secured in place. Also the felt under the tile may be compromised.

 

[carpdad]

He has other videos about slate roof. Other searches in the youtube.

 

[dj3]

Do you call "slab" what we call "tile"?
"Tile" could be made of clay, concrete, slate, rubber, composite, etc.
If yes, each tile is secured to the deck with a nail or two. There is tar paper under the tiles, but this paper won't last forever, and must be replaced when no longer effective.