Chimney Back Gutter Flashing

[Dave_Mitch]

I'm putting back together an old outhouse that used to be a small iron mongers, so has a chimney, I am replacing the corrugated sheeting and have also had a proper back gutter made to replace the cobbled piece of lead that was letting in water.

What I am unsure about and need advice on, is how to correctly add flashing to the sides of the back gutter to meet up with the corrugated sheeting. The complication being as I hope you can see from the picture is that the end of the lead is only about 4" from where the corrugated sheets will end (I will be adding guttering), I can't see how step flashing will help stop water running off the sole plate running straight under the sheeting.

Any advice gratefully received, many thanks in advance.

BTW. I know I need to add a piece of lead above the upright from the sole plate.

 

[noseall]

You will need to sheet from the eaves up around the back of the chimney (short run) separately and fix the side flashings. You can then fix your back gutter over the side flashings then sheet over the whole lot and cut around the chimney as normal.

 

[Dave_Mitch]

Thank you Noseall, think I understand what you mean