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Old 05-09-2019, 07:04 PM   #1
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Odd Question on Ridge Cap/Vent


Am 12 days into a 28 square roof replacement that I am primarily doing myself. As an aside, I have done extremely hard work before, but roofing takes it out of you in a way that I have never felt before, as at the end of each day, my knees and back are aching.

House has clipped gables that I wish to remove for aesthetic reasons, but am almost done my holiday from work. Thought I would leave the gables dried in, install the ridge vent I planned (rigid, GAF Snow Country) and that is the question I have.

I am not sure if I can install and cap shingle the ridge vent between the clipped gables (and then do the gables later) and be able to start up the line of ridge shingles from the originating end. Am I overthinking this, or can I just leave the ridge vent exposed for the few months it will take me to remove the gables? Thanks for any thoughts and my respect to those who do it for a living....

Brad
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Old 05-09-2019, 07:42 PM   #2
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Re: Odd Question on Ridge Cap/Vent


I did the same amount over a longer time frame so did a lot of start and stop work. What is currently in place on the roof for high venting? Is that being removed?

And what do you have for low venting? In some cases you can get by with just low venting if there is sufficient wind, but for the warmer months it isn't a real problem. As long as you get it all put together befor the snow flies you should be all set.

If you have any questions about how much venting they recommed and where it needs to be we can help.

Bud
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Old 05-09-2019, 07:48 PM   #3
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Re: Odd Question on Ridge Cap/Vent


No clue what a "clipped gable is".
Got some pictures of what your doing?
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Old 05-09-2019, 08:06 PM   #4
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Re: Odd Question on Ridge Cap/Vent


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Originally Posted by joecaption View Post
No clue what a "clipped gable is".
Got some pictures of what your doing?

The top of the gable is flat and the roof is hip above that, so just think about the sides of the hip roof is not done.
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Old 05-09-2019, 09:09 PM   #5
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Re: Odd Question on Ridge Cap/Vent


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Originally Posted by Bud9051 View Post
I did the same amount over a longer time frame so did a lot of start and stop work. What is currently in place on the roof for high venting? Is that being removed?

And what do you have for low venting? In some cases you can get by with just low venting if there is sufficient wind, but for the warmer months it isn't a real problem. As long as you get it all put together befor the snow flies you should be all set.

If you have any questions about how much venting they recommed and where it needs to be we can help.

Bud
There were 2 turbines which I removed and there is mostly continuous vented aluminum mesh soffit around the entire house. Will be replacing the 2 turbines with ~50 feet of the ridge vent. Have seen the calculators for venting area, but (perhaps naively) thought that increasing the high venting
(which I am assuming I am doing with the ridge vent over the turbines) would not be an issue.
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Old 05-09-2019, 09:13 PM   #6
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Re: Odd Question on Ridge Cap/Vent


Quote:
Originally Posted by joecaption View Post
No clue what a "clipped gable is".
Got some pictures of what your doing?
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Old 05-09-2019, 09:17 PM   #7
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Re: Odd Question on Ridge Cap/Vent


Quote:
Originally Posted by joecaption View Post
No clue what a "clipped gable is".
Got some pictures of what your doing?


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Old 05-09-2019, 09:47 PM   #8
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Re: Odd Question on Ridge Cap/Vent


Can you stop the vent a foot or two from the end and just remove a few shingles to finish it when you do the ends?
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Old 05-09-2019, 10:01 PM   #9
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Re: Odd Question on Ridge Cap/Vent


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Can you stop the vent a foot or two from the end and just remove a few shingles to finish it when you do the ends?
That was sort of the plan as I would run the ridge vent the entire length up to the "clip" at each end. My wonder was whether I could "restart" the ridge cap shingle line from the end where I started it, to extend it to the new gable end.

I could make this all moot, and just seal the ridge (I have not opened it for the vent yet) and leave the roof unvented up high until I do the gables.
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Old 05-09-2019, 10:07 PM   #10
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Re: Odd Question on Ridge Cap/Vent


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That was sort of the plan as I would run the ridge vent the entire length up to the "clip" at each end. My wonder was whether I could "restart" the ridge cap shingle line from the end where I started it, to extend it to the new gable end.

I could make this all moot, and just seal the ridge (I have not opened it for the vent yet) and leave the roof unvented up high until I do the gables.
You could leave the box vents.
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Old 05-10-2019, 06:25 AM   #11
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Re: Odd Question on Ridge Cap/Vent


I would locate the final position of the ridge vent and back up to the next junction (depends on brand) and stop there until the gables are finished.

Be sure those soffit vents have openings underneath. They sometimes get installed over small or no vent holes and just look good.

Looks like nice country up there.

Bud
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Old 06-17-2019, 07:53 PM   #12
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Re: Odd Question on Ridge Cap/Vent




Have been puttering along at reframing (if you can call a 4" stud a frame) and have finished one end as you can see above. In the opening in the vinyl siding, I thought to DIY a gable vent with some trim and aluminum mesh and wondered if I should put one in and how large if I do?

Did the calculations on NFA for the continuous soffit vent (attic is 1792 sq ft w/ 12" fiberglass insulation and waxed cardboard baffles in each bay) and came out with 1287 sq ft of low venting and will be installing 60' of GAF Snow Country Advanced ridge vent that gives me 1152 sq ft of venting at the ridge.

Have read on here that it used to be wisdom not to put a gable (or close them off if you did have them) vent in with a ridge but that was no longer held to. Any thoughts?

Brad
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Old 06-17-2019, 08:11 PM   #13
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Re: Odd Question on Ridge Cap/Vent


I am sure hot air will rise but it is always best to have more intake than exhaust, so it doesn't try to suck air from the house.
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Old 06-17-2019, 08:18 PM   #14
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Re: Odd Question on Ridge Cap/Vent


We need to check your calculations. Did you use the 1/150 or 1/300 approach?

Your answer should be in the range of 6 ft² for high and 6 ft² for low using 1/150.

Gable vents do not conflict with a ridge vent but if you do not already have the gable vents not sure I would go to the effort to add them. Do you have a reason?

Bud
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Old 06-17-2019, 08:51 PM   #15
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Re: Odd Question on Ridge Cap/Vent


Quote:
Originally Posted by Bud9051 View Post
We need to check your calculations. Did you use the 1/150 or 1/300 approach?

Your answer should be in the range of 6 ft² for high and 6 ft² for low using 1/150.

Gable vents do not conflict with a ridge vent but if you do not already have the gable vents not sure I would go to the effort to add them. Do you have a reason?

Bud
Did not use either approach, simply found a similar soffit product on homedepot's website and used the math on that. Cannot find the product now, but I have 24" mesh vent and ~204' of that. See I did the math wrong on the ridge vent, which lists 18 sq in / lineal foot which gives me 96 sq ft as I did not divide it by 12. Let us just assume that all my figures are faulty...

House was built in 1993 and there was no reason for the gable vents, just needed to "fill in the space" with something and thought that might make sense.

https://www.lowes.com/pd/Amerimax-13...Soffit/4650635

These are the type of vents, except my panels are 17" x 24"...

Last edited by jurgenk; 06-17-2019 at 09:04 PM. Reason: More correcting of math...
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