During recent heavy rainfall over the past two weeks or so, our internal kitchen window cill is filling with water on the inside via one of the upper double glazed window units. I would stress that this only happens during heavy rainfall and not during light showers.
Looking at the outside wall, my guess is that water is pentrating the double glazed units due to run off from the outside wall. Our cottage is 200 years old, and has a rough render over the stonework, but looking at the external window apperature, the render curves inwards towards the top of window frames and my guess is that water is simply running down the O/S wall and running directly onto the window panes, and finding a small gap in the window pane.
My question therefore is if I were to add an outward curving cement lip at the top of the window recess, similar to the curved lip at the base of our conservatory, would this deflect the water and serve to protect the window which faces the prevailing winds?
I did swap the window for a similar unit from the back of the house but that too leaked during heavy rainfall, so its not a faulty unit as such.
Looking at the outside wall, my guess is that water is pentrating the double glazed units due to run off from the outside wall. Our cottage is 200 years old, and has a rough render over the stonework, but looking at the external window apperature, the render curves inwards towards the top of window frames and my guess is that water is simply running down the O/S wall and running directly onto the window panes, and finding a small gap in the window pane.
My question therefore is if I were to add an outward curving cement lip at the top of the window recess, similar to the curved lip at the base of our conservatory, would this deflect the water and serve to protect the window which faces the prevailing winds?
I did swap the window for a similar unit from the back of the house but that too leaked during heavy rainfall, so its not a faulty unit as such.
