Hello all,
I wonder if anybody has found themselves in a similar predicament to me and might be willing to offer some pearls of wisdom.
My house is 1850’s and built from weathershot gritstone. When I moved in it had a hardwood, pitched-roof conservatory built against the gable end, which is also the weather wall.
It was rotting and leaking so I tore it down and replaced it with a stone building with a pitched slate roof.
One of the main issues with the old conservatory is that water would penetrate and soak the wall below the roof line and ever leak all the way through the wall into the kitchen, I always suspected this was due to poor flashing, the old stuff seemingly being held together with silicone but it was also suggested to me that it may be a leaky chimney or issues with the chimney breast on one side of the house having been removed or even poor pointing.
To combat this I had the whole wall reprinted with hydraulic lime, the chimney re-flaunched, the parapets fitted with lead caps over the joints and the flaunching renewed, I also treated the wall with a silicone based weather proof sealant and insisted that, when the extension roof was fitted, the lead was cut in to at least 50mm, and yet it still leaks.
I get a pattern of moisture coming down the wall following the pitch of the roofline and water rubbing down from the apex, mostly this happens during high winds but it’s regular enough to be a constant issue.
A little research has led me to 2 possible solutions, after which I’m completely out of ideas.
1) Use lead sealant to bond the vertical edges of the stepped flashing to the stone.
2) Rip out the stepped flashing and cut a straight line into the stone following the pitch of the roof and install apron flashing instead.
I’ve attached a few pictures to help make sense if the situation, any advice I’ll be very gratefully received, I’m entirely out of ideas.
I wonder if anybody has found themselves in a similar predicament to me and might be willing to offer some pearls of wisdom.
My house is 1850’s and built from weathershot gritstone. When I moved in it had a hardwood, pitched-roof conservatory built against the gable end, which is also the weather wall.
It was rotting and leaking so I tore it down and replaced it with a stone building with a pitched slate roof.
One of the main issues with the old conservatory is that water would penetrate and soak the wall below the roof line and ever leak all the way through the wall into the kitchen, I always suspected this was due to poor flashing, the old stuff seemingly being held together with silicone but it was also suggested to me that it may be a leaky chimney or issues with the chimney breast on one side of the house having been removed or even poor pointing.
To combat this I had the whole wall reprinted with hydraulic lime, the chimney re-flaunched, the parapets fitted with lead caps over the joints and the flaunching renewed, I also treated the wall with a silicone based weather proof sealant and insisted that, when the extension roof was fitted, the lead was cut in to at least 50mm, and yet it still leaks.
I get a pattern of moisture coming down the wall following the pitch of the roofline and water rubbing down from the apex, mostly this happens during high winds but it’s regular enough to be a constant issue.
A little research has led me to 2 possible solutions, after which I’m completely out of ideas.
1) Use lead sealant to bond the vertical edges of the stepped flashing to the stone.
2) Rip out the stepped flashing and cut a straight line into the stone following the pitch of the roof and install apron flashing instead.
I’ve attached a few pictures to help make sense if the situation, any advice I’ll be very gratefully received, I’m entirely out of ideas.