Finishing off slate roof on outhouse

[aquitaine]

I have re-slated a stone outhouse - an old outside toilet.

The building is wedge shaped, the shape of a lean to, but is actually free standing. How do I finish the high point of the roof, the length that would join the house wall if it was a lean to?

I have fitted a length of wood to support the top edge of the highest row of slates but it is exposed to the weather. I imagine a piece of metal that is screwed to the piece of wood and loops over the top slates to create a weatherproof seal. Is there such a thing? I can't use lead; it would be gone by tea time.

If I use roofing felt or the like how do I fix it securely to the slates?

Thanks.

[welsh brickie]

you build the wall higher than the slates and seal the slates to the wall with a lead flashing, the top of the wall is finished with a flat coping stone.

[aquitaine]

Thankk, you. I realise that that is what should have happened. The problem is this.

There were two wedge shaped outhouses back to back, one at a higher level than the other. I am working on the lower one.

The two sheds shared a back wall. The old slate roof of the lower one was attached to the wall as welsh brickie describes it. The wall then rose a couple of feet higher to accommodate the slate roof of the higher shed and was finished off with coping stones.

The stone work of the higher shed was beyond repair. I managed to consolidate the shared back wall up to the roof line but I coiuld not restore the wall firmly enough and square enough to do what welsh brickie advises. The stone work was more or less random.

That's why I now have a very neat slate roof but no way of finishing it off. Not lead, it would be stolen.

So what, do you think?

[welsh brickie]

if the wall is uneven and hard to build on then make a framing around the wall and concrete it level and then start your new blockwork on top