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I would like some input on what type of flashings and vent jacks should be used with concrete tile roofing. It has a 50 year warranty and I want to be sure the flashings last as long as the roof.
There will be valley flashings,(not sure yet if they will be exposed or not), drip edge, vent pipe jacks and exhaust fan vents. I’ve heard copper might be the way to go, but I’d like to hear other thoughts in case the colors won’t match the roofing material.
The roof pitch is 12/12 in a somewhat windy area in the Pacific Northwest. Hot summers, a little rain and some years a couple feet of snow.
Thanks in advance for any advice.
Jerry
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If your going to the expense of concrete tile roofing then you may as well continue onto the copper trimmings.
As far as the clash of the colours is concerned, you must be joking.
Class doesn't clash...
*With a 12/12 pitch you better check every thing out with the manufacturer and your building department. Tile on steep pitches often requires some form of clips as well as nails. The last thing you need is a concrete tile sliding off the roof and knocking you on the nogin. Avoid any jacks if possible, or locate penetrations at or near the ridge. Consider grouping them in a single chase. Flashings in tile roofs do not function by laping in like they do with shingles. Usually they are treated with cement-mud and mastic. Although elastomeric may be a better solution these days. Valleys will definitely be exposed. Copper is a good choice in a rainy climate, but you will get green run-off.
*JB, how about lead for flashing???????
*Gabe, I agree copper looks really classy but I don't feel it would go with every color of roofing available. That's why I'm open to other options. Mike, Thanks for the reminder about the steep pitch. I had forgotten about the retaining clips available with the roofing I'm using. Also, I've seen this roofing installed so the valley is not exposed. It looks like a closed valley would on a shingle roof. Not that the flashing is not exposed to weather, you just can't see it. Can you explain the elastomeric you speak of, something I'm not familiar with.Bill, I've used lead for flashings in the distant past but is it still legal to use?Thanks for the info guys. JB
*JB as far as know lead is still used for roofs. A.E.R. Systems(1-800-748-6061) is who I use. Not cheap for roofing. I have installed one lead roof and I belive it cost around $650 per sq. Flashing is of course less then that.On slate roofs lead is my first choice. My pet peve(sp) is not tapering your valley's from top to bottom. If the Top is smaller then the bottom what ever falls into the fall will always have a bigger opening to move to. Sort of a self flushing valley. Don't be afraid to add the rubber self stick underlayment to your valley's.b Hate to have a leak sort of guy
*JB just a thought on lead like all products there's a "cheaper lead" out there. Your flashing should weight around 4 to 5 pounds pre sq.ft.and we try not to install it in stips no longer then 3 ft.
*Bill, thanks for the good info. I'm with you on the tapered exposed valleys. Whenever I see one done by someone else it makes me think 'there's another guy who cares about a quality job'.I started using the self adhesive underlayment for valleys when it became code around here for the eaves outside wall lines. Don't know if it's completely necessary but I sure feel better about the job.I'm going to run your lead info by my sheetmetal sub and see if he can handle it. I know he does a lot of copper so he might do lead too.Thanks again, JB