flashing membranes

[Jeff Beck]

Anyone had experience with flashing membranes as counter flashing on chimneys?

I saw this at this morning's inspection but can't identify the manufacturer or find an installation manual.

I'd appreciate any comments or advice.

Thanks,

Jeff

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[caryseidner]

Jeff,

There are some peel and stick EPDM products that would work okay, but if it's H2O shield than it is wrong because it is not UV stable. From the photos, the right-hand side looks like EPDM to me, but the left-hand side looks more like an emulsified coating.

[kurt]

Membranes have to be mechanically fastened when used as flashing @ vertical applications. There should be a termination bar and a counterflashing strip.

After that, I'd have a lot of other commentary depending on a lot of stuff, but that's where I'd start.

[Tom Corrigan]

Most Building Codes require that there be a minimum separation between the chimney and combustible materials. This would eliminate the EDPM or tar approach to counter flashing. What Code is used in your area? What does that Code require?

Tom Corrigan

[pupdawg]

That's a epdm band-aid. There's no manual for this. The product is designed to be used in a flat roof system, not to flash the top of old step flashings. It may work for a while (probably won't) , but I wouldn't have wouldn't have a lot of faith in this detail. Just my opinion.

[RobC]

Anyone had experience with flashing membranes as counter flashing on chimneys?

I saw this at this morning's inspection but can't identify the manufacturer or find an installation manual.

I'd appreciate any comments or advice.

Thanks,

Jeff

No.

Identifying the manufacturer has no relevance to your inspections in this case. The product is not intended for this application. Aside from the fact that the material will shrink, peel, melt, and dissolve over time, visualize water draining on the brick surface and where it's going to end up; that will answer the question you should be asking.

I shot this just for you from this mornings' inspection

Download Attachment: RoofingChimneyMasonCounter (Medium).jpg

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This is the illustration I would include in my report

Download Attachment: ChimneyCountFlashing (Medium).JPG

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