Lead flashing under pebbledash for consevatory roof

[derk17]

Hi I am erecting a upvc conservatory with a georgan roof style. The house walls are good quality pebble dash which I am chasing back to blockwork to fix upvc frames to. If I am chasing back for the roof plates then re-render/pebbledash do I need lead flashing under the pebble dash and onto the frame. My thinking is that making good with pebbledash up to the roof plate, the water will not be able to seep behind the roof plate as it will be covered in render/pebbledash. Hope this makes sense. Cheers

 

[davecrouch]

i would not do it this way to be honest. i would cut back the render to allow for a new lead flashing covering the edge of the conservatory line and 150mm upstand. the render should not idealy cover the leadwork. the lead will move and crack the render over time. it would look neater with a nice straight cut line and lead sealed.

 

[^woody^]

Yes, render does not go past or over flashing it is cut back

 

[derk17]

Many thanks for the advice which is quite correct.
I am now unsure about chasing out all the pebbledash as the the wall plates are 'gable' with a gutters running adjacent to the wall( both sides) so it means i have to also chase out pd to allow for the gutter surrounding the conservatory to fit against the wall, this means exposing more blockwork to the elements. I am now considering just flatening the pb as much as possible on the side walls and using Lead flashing on the roof section.
Has any body also had this issue.

regards

 

[foxhole]

I used a timber fillet screwed just above roof line , lead from behind it down over timber onto roof, sealed back against dashing.