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-   -   How do you properly flash around chimney and roof in upper corner? (

StevenC 05-16-2010 04:30 PM

How do you properly flash around chimney and roof in upper corner?
My roof is a basic A frame style with the chimney going up the side of the house. So there is a high side of the chimney and a low side. I know I'm suppose to use step flashing up the side, but do they make a piece of flashing or something besides tons of caulking that is designed for that intersection? I can bend a piece of flashing to wrap around and go down the side but then I would have to cut the bottom to make it wrap around which I'm trying to avoid. I hope this makes sense.

oldognewtrick 05-17-2010 04:53 AM

Steven, step flashing is installed along the side and a top and bottom metal "pan" is fabricated for the high and low side.

What is your chimney made of?

StevenC 05-17-2010 10:54 AM

Its a brick chimney. How do I make this "pan"? And can it be fabricated from regular flashing? Or does someone make a pre-fabed one?

oldognewtrick 05-17-2010 02:05 PM

Always start at the bottom and work your way up. The pan should be a solid piece (called "L" flashing) and wrap around the corner at the bottom. It will have to be bent to the slope of the roof. Your first step flashing should wrap down over your bottom pan. Then continue up the side nailing the step in the upper corner away from the chimney. When you get to the top turn the last piece of step around the corner. The top pan should extend past the chimney at least 2" and up the roof 12".

Now you have to install counter flashing. Access to a grinder and a siding break will be a plus.

noah_678 06-28-2010 12:26 AM

The flashing get installed on the sheathing/paper for this chimney peak flashing.Try to consult any roofing contractors in your area.

ZnCuSnRoofer 10-04-2010 02:13 PM

You can see the job step by step here, click on the pictures for close-ups. Hope it helps.
Virginia Roofing Contractors Company in Northern VA: Lyons Contracting

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