Fitting flashing/finishing shed roof?

[Ruggers]

I am wanting to finish off the top of a shed roof I have done at home and have bought a roll of class 4 lead flashing. My idea was to slit into the rear of the shed wall around 30mm deep, push the length of lead in, fold it 90 degrees so its going up vertical, then bend it over the ridge and onto the slate. I can't think of any other option as the angled ridge slates a seen only came in one set angle which looked between 35-45 degrees and doesn't suit my roof where as the lead will be flexible.

If I'm to do what I say, how wide does the slit have to be in the block wall, grinder blade thickness? or twice as wide to allow for wedges?

Also where the lead folds over slate do you seal this in anyway or just tap it down tight against the slate? Do you use lead silicone?

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• Ruggers
• 31 Jul 2013
• 2

Untitled

• Ruggers
• 23 Sep 2013
• 1

 

[Alastairreid]

You dont need to grind a channel into the wall! fix a fascia board on the back and a length of ridge batten to the top then dress the lead over the slates and onto the fascia.

The lead can be held down with ridge straps.

http://www.jamiebrownroofing.co.uk/gallery/21-mono-pitch-with-lead-mono-ridge.html

 

[Ruggers]

Sorry as I'm not a roofer I'm a little confused.
What do you mean by fix a facia to the rear of the wall and a ridge batten to the top, is the lead somehow attached to the facia or ridge batten? What size is a ridge batten, different to a 19x38mm slate batten or 25x50mm tile batten? Would this way not just add a lot of expense because I'd have a facia and straps to buy?

 

[Ruggers]

Anyone any advice on this?

 

[Ruggers]

Do you have to seal flashing down to the slates wit silicone or lead silicone? or is it just tapped down and lays over them flush?

 

[Alastairreid]

What detailing did you do for the ridge and back face?

 

[Ruggers]

I still haven't done anything with it. I was thinking of just attaching the lead to a strip of wood across the back and folding it (like you fold felt back on itself when doing a flat roof and attaching to the facia) then over the ridge again.