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Old 08-23-2011, 04:25 AM   #1
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is this a good idea? flashing with roofer


Hi
I am back gents!

i know you guys are sick of my noobie questions, so here is a quick one.
i am installing a exhaust fan in the bathroom upstairs and intend to pipe the vent out the roof. is it a good idea to have same roofer who redid my roof to come and do the flashing?

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Old 08-23-2011, 05:36 AM   #2
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is this a good idea? flashing with roofer


If you liked his work--of course!!

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Old 08-23-2011, 11:44 PM   #3
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is this a good idea? flashing with roofer


yea i think we ended up having a good relationship with the crazy half flat half shingled roof so i figure we will continue the relationship. thanks for your input
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Old 08-23-2011, 11:50 PM   #4
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IMO it is always a great idea to use someone again.If the experience was good that is.

I always enjoy having repeat customers.It lets you know you are doing something right.

I feel that when you have repeat customers it lifts your moral and gives you a better opinion of yourself.

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Old 08-23-2011, 11:52 PM   #5
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is this a good idea? flashing with roofer


thanks for the input. yea that's what i figure why go to someone else i don't know when i already have an established connection
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Old 08-24-2011, 11:20 AM   #6
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is this a good idea? flashing with roofer


Roof vents typically slide under the shingles. No other flashing is required.
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Old 08-24-2011, 12:09 PM   #7
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I would not use a pan vent that is used for attic ventilation.

I would use a baffle style vent for your exhaust.The baffle is a very import feature that is needed.

When the fan is turned on,,the air flow opens the baffle allowing the exhaust to escape.When the fan is turned off,,,the baffle closes.

In a new construction subdivision here in Springfield a couple years ago we roofed 13 out of 22 homes.I was going over materials with my builder and questioned the position of 1 particular vent.

He informed me of its intended function.Fan exhaust.I told him the style of vent needed for the exhaust.The damper vent.

None of my homes had any issues with the damper vent.I started receiving calls from the other builders who had their roofers install regular pan vents for damper vents.

A constant air flow was the result.(Not constantly but an open invitation for entry)

The temperatures in the rooms with the pan vents were noticeably colder in the winters.And condensation was an issue.I replaced all the vents in the subdivision and all is well.

These pix show the style that would work well in your situation.
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is this a good idea? flashing with roofer-thumbnail.jpg   is this a good idea? flashing with roofer-thumbnailrrrrr.jpg   is this a good idea? flashing with roofer-attic_damper-vent.jpg   is this a good idea? flashing with roofer-20020301_ask_handyman_page003img001_size2.jpg  

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Old 08-24-2011, 04:32 PM   #8
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is this a good idea? flashing with roofer


thanks so much for the detailed reply!

so i need a damper vent, which is a type of baffle vent? and it just needs to go under the shingles, correct?
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Old 08-24-2011, 06:43 PM   #9
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This video will show you all the parts that come with the vent kit.

The purpose of the video is to show the parts in detail.I am in no way promoting the product.As a matter of fact I use Grainger vents.




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Old 10-12-2011, 05:09 PM   #10
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is this a good idea? flashing with roofer


So finally the roofer came out today and installed the vent. just like the one you guys suggested. although i checked out home depot and that kit only costs about $30. i definitely overpaid! at least i dont have to worry about my own flashing job. the only issue now is attaching the fan exhaust pipe to the vent itself. i am using a 3" to 4" adapter and a semi rigid aluminum pipe . like this one
http://www.homedepot.com/catalog/pro...5bc522_300.jpg

but only 2ft long.

my question is do i need to use insulation sleeve on the pipe if i am spraying icyene foam around it, and can i just use the hvac kind of tape to tape around the edges where they connect or should i add a zip tie as well?
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Old 10-12-2011, 05:19 PM   #11
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Old 10-12-2011, 05:20 PM   #12
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Old 10-12-2011, 05:20 PM   #13
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Old 10-12-2011, 05:21 PM   #14
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Old 10-14-2011, 10:26 PM   #15
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is this a good idea? flashing with roofer


It's interesting to see that the roofer installed the vent directly on top of the existing shingles.

When I had my exhaust vent installed, they removed the shingles around the roof penetration, installed ice and water shield on top of the sheathing, put the vent on top, and then installed the new shingles.

I would recommend, if the roofer didn't already, to put two dabs of caulk over the nail heads also, even though there are dabs under the vent's flashing.

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