Covered walkway

[partimehero]

Hi,

I am wandering the best way to do this. I have been asked to put up a clear roof over an alleyway between 2 houses. its approx 1600mm wide X 8.5 metres long.

My initial thoughts are to use clear corrugated sheets on a timber frame sloping from front to back along the whole length. A major concern of mine is the flashing.

As this roof isnt going to run parrallel with a mortar line, where / how is the best way to seal the brick-pvc joint?

I know normally you would rake out a channel in the mortar so the lead can be cemented in but as this wont be in line with a mortar line, whats the best thing to do?

Any advice greatly appreciated.

 

[Nige F]

why won`t it be in line with mortar line is it on a slope - any chance of a picture

 

[ladylola]

Assuming that it won't be inline with a jot bcause of the fall. You should ,however, be able to have a couple of steps in the flashings, i.e. run the flashing from the top as normal and when the roof has dropped by the thickness of a brick course then drop a new piece of flashing by a course thus creating the step.

whatever you do I'd say don't go down a flashband route

 

[partimehero]

Hi Ladylola,

Thanks for the guidance. Placing the flashing straight, then dropping it by the thickness of a brick makes total sense - Rather than grinding out a channel in line with the fall. Thank you.

When you say not to go down the flashband route, do you mean to use lead instead?

Also, I have 2 vertical grey 4" soil pipes to work around - 1 on each wall. Whats the best way to seal these?

Thanks

 

[ladylola]

Yeah lead every time over flashband which doesn't have a very long lifespan in my experience even when used with the primer etc plus it will leave a mess on the wall should the roof ever be removed.
The vertical pipes are a problem as you have very little option but to surface mount something to them . I've seen lead aprons used for this with a welded vertical section sealed at the top with some mastic like leadmate fixed with a large jubilie clip. If you can then arrange the sheet joints so that the uppermost sheet is sitting on top of the lead then your chances of a watertight finish should be improved.

 

[partimehero]

Great stuff..... thank you! It will be done this weekend hopefully.