Could a knowledgeable roofer or builder confirm what are the causes of the problems indicated in the photos shown here.
Problem is beneath a fourth-floor pitched roof above a rear stairwell, where there is extensive damp penetration. House is 4-storey Victorian end-of-terrace. First photo shows internal evidence of damp on flank wall side of stair-well.
View media item 26737
Next photo was taken in rain, and shows top of flank wall being soaked by rain-water (you can just see the water reflecting). The left hand part of the wall is topped by a parapet wall adjacent to a flat roof. The right hand side of the wall, where it slopes down, is topped by a parapet wall adjacent to the the pitched roof above the stairwell in question. (Sorry for picture quality, it was hard to take this photo).
View media item 26738
Next photo was taken on roof, and shows the flank-wall parapet wall above the stair-well pitched roof. There seems nothing on top of the parapet wall to keep rain from dripping down external face of wall, which is why it is getting soaked in rain, and presumably this is penetrating through into stair-well.
View media item 26739
However, next photo shows there are coping stones on the parapet adjacent to the flat-roof part.
View media item 26740
Next photo shows water-damage on other side of stair-well.
View media item 26741
Next photo shows the other side of this internal wall, where the wall-corner is being soaked in the rain by a trickle of water at the corner of a gutter and the pitched-roof.
View media item 26742
Next photo shows that the trickle of water seems to be the result of a piece of flashing overhanging the gutter in question:
View media item 26743
Next photo shows same lead-flashing from below:
View media item 26744
I am asking this because the whole of this building was extensively renovated/repaired about a year ago, including repairing all the guttering, re-rendering the flank-wall in question, and generally making sure the house was in good order externally. Basically, I would like to know if it's possible to say from these photos that the reasons for this water-penetration can be put down to defects in this repair, which are causing these problems.
Thanks for any useful comments.
Problem is beneath a fourth-floor pitched roof above a rear stairwell, where there is extensive damp penetration. House is 4-storey Victorian end-of-terrace. First photo shows internal evidence of damp on flank wall side of stair-well.
View media item 26737
Next photo was taken in rain, and shows top of flank wall being soaked by rain-water (you can just see the water reflecting). The left hand part of the wall is topped by a parapet wall adjacent to a flat roof. The right hand side of the wall, where it slopes down, is topped by a parapet wall adjacent to the the pitched roof above the stairwell in question. (Sorry for picture quality, it was hard to take this photo).
View media item 26738
Next photo was taken on roof, and shows the flank-wall parapet wall above the stair-well pitched roof. There seems nothing on top of the parapet wall to keep rain from dripping down external face of wall, which is why it is getting soaked in rain, and presumably this is penetrating through into stair-well.
View media item 26739
However, next photo shows there are coping stones on the parapet adjacent to the flat-roof part.
View media item 26740
Next photo shows water-damage on other side of stair-well.
View media item 26741
Next photo shows the other side of this internal wall, where the wall-corner is being soaked in the rain by a trickle of water at the corner of a gutter and the pitched-roof.
View media item 26742
Next photo shows that the trickle of water seems to be the result of a piece of flashing overhanging the gutter in question:
View media item 26743
Next photo shows same lead-flashing from below:
View media item 26744
I am asking this because the whole of this building was extensively renovated/repaired about a year ago, including repairing all the guttering, re-rendering the flank-wall in question, and generally making sure the house was in good order externally. Basically, I would like to know if it's possible to say from these photos that the reasons for this water-penetration can be put down to defects in this repair, which are causing these problems.
Thanks for any useful comments.