gap in ridge tiles

[blisters]

I have recently noticed that there is a gap between two of the ridge tiles on my roof. It looks like the mortar between the tiles has disappeared. Does this mean that the rain may get in through there or is there likely to be a layer of cement beneath holding the tiles together?

The house was built in the late 80s.

 

[Alastairreid]

The ridge tiles should be fully bedded, best to get it checked before winter anyway.

 

[datarebal]

the butt joints should be fully bedded, the remainder should be edge bedded. fully bedding will lead to failure.

 

[Alastairreid]

If you set in plenty of compo to the inside of the ridge tile and bed down onto this and point the outer side as well as a full bed between each tile they will never move.

 

[Mw Roofline]

I have recently noticed that there is a gap between two of the ridge tiles on my roof. It looks like the mortar between the tiles has disappeared. Does this mean that the rain may get in through there or is there likely to be a layer of cement beneath holding the tiles together?

The house was built in the late 80s.

Anything built late 80's will probably be a Bovis/Wimpey home where the norm is one spoonful of cement per 15 tonnes of happy shopper sand.

The felt is probably folded over the roof so any water getting in shouldn't leak into the house.

As thingy says above, just get a roofer in to rebed the tiles with fresh cement