Water leaking into subfloor from doorstep

[sjee6]

Moved into my new home recently and discovered some damp issues. There are gaps by the side of my doorstep where it looks like water is entering. I'm a complete novice when it comes to anything to do with building or DIY - I at first thought It was coming from the airbricks going into next door (Its a mid terrace) but since noticing those gaps, and also noticing how wet the stone and bricks are beneath the door, I'm now thinking it must be coming in from those gaps by the side of my doorstep. Can someone confirm weather or not it actually is this what's responsible, and if so how do I fix it?

Thanks, Steve

 

[ree]

sjee6,
Is there a porch roof over the entrance way?
The quarry tiled front step needs demolishing, and rebuilding with a sill projecting over the riser.
Any masonry sill needs to be fully supported.
Moisture could be creeping past the door frame or under the water bar.
The plaster or render on both sides of the entrance way might also be water damaged, & allowing moisture penetration behind the door frame.

Hallway sub-areas are well known for lacking through ventilation - vents can be inserted in the sill riser.
Joists should be capped with DPC material & firmly fixed at bearing ends.
Can you stand back & post a photo of the front elevation at low level?

 

[sjee6]

ree - Thanks for the reply. I've included a picture of the front and the rest of the room, there's no porch, just a standard mid terrace. Damp is a common problem where I live, pretty much all the houses on my street have been rendered. My plan for the joists was to have them sitting on walls instead of actually inserting them because the foundation doesn't seem to be level, I don't know if it's subsided or if It was just built that way because my street is on a bit of a slope, but the houses arn't stepped so it must've been built that way. You can see how someone has cut and hung some of the joists on one side to make the floor even. Also, I know they've just been wrapped in plastic but some of the joists that are in the wall are severely rotten whilst the ones that are hung are okay, I'm thinking laying them on top of walls will protect them from any damp that's inside the wall or condensation getting trapped in the DPC material. But I don't know, what do you think about that?

There's also more damp that accumulates on the other side of the room but I have no idea where It's coming from.

Definitely not something I could do myself so how much do you think it would cost me to have the step rebuilt?

Thanks for the help.