Roof Overhang Framing

 
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Old 07-28-2010, 02:27 PM   #1
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Roof Overhang Framing


Have you guys ever seen a house framed where the ceiling joists cantilever over the top plate of the exterior wall to form the overhang? On top of the cantilevered joists was a continuous 2x8 where the rafters sit stacked over the joists. The rafters were cut at the run of the roof pitch and were toe nailed into that 2x8.

House was built in '88. We're adding on a screen porch and we cut back the overhang inside of the screen porch to frame up a gable wall and upon removing the soffit were like WTF

Neither myself or my guys have seen anything like this and I was wondering if anyone had some insight they could share on this.
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Old 07-28-2010, 03:21 PM   #2
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Re: Roof Overhang Framing


old school framing

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Old 07-28-2010, 06:01 PM   #3
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Re: Roof Overhang Framing


i just did a roof similar to what your are describing, hand cut roof with a 1'8" over hand that was only allow to drop below the wall 3" for a reveal purposes. I ran my ceiling joist out past the wall and layed my plate on top of the celing and stacked up to a 4 1/2 " stub wall and toe nailed the rafter's down and nailed them into the ceiling on the tail. But on a 2x8 on edge? that seems like quite the hinge point to me. But like what was said already "old school framing" what can ya do.
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Old 07-28-2010, 06:52 PM   #4
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Re: Roof Overhang Framing


it's a great way to get nailers for your soffit material when they used to use finish ply for soffits. I have never done it but I have seen it on occasion, most houses don't have that.

break out the sawsall.
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Old 07-28-2010, 10:15 PM   #5
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Re: Roof Overhang Framing


Only thing that comes to mind is a curved, or a bell style tail. Or, like said above, used to build up plate height for either steep pitched roofs or large overhangs/
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Old 07-29-2010, 06:00 AM   #6
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Re: Roof Overhang Framing


Quote:
Originally Posted by ApgarNJ View Post
break out the sawsall.
Since we're cutting off the overhang to frame up a gable wall, we're actually cutting off the connection point where the rafters meet the ceiling joists. This means we're going to cut 2x blocks at the run of a 9 pitch to fill the gap between the rafter and the joist and then sandwich both sides with 1/2" OSB. Basically this makes a raised heel truss. Can you say change order?

We actually ran into a second issue with it as well. We're using a 4x6 beam on top of our 4x4 posts. With conventional rafters, we had to raise the top of the beam to make our soffit/fascia heights even. Well with the 9 pitch and the length of the overhang meeting up with their style soffit, the soffit height for the screen porch was going to be 4" below the bottom of the 4x6. Below the 4x6 is our screen opening, which means we now have to fir down another 5-6" (provides nailer for the bed mold at the soffit) on all walls.


Quote:
But on a 2x8 on edge? that seems like quite the hinge point to me.
The 2x8 was laid flat across the tops of the cantilevered joists. Kind of like continuous bracing at the outer edge of the overhang which provided 7 1/2" for the rafter to nail to.


I guess if Apgar has seen it then it must have been done elsewhere and there must be some reasoning behind it. I was kind of thinking the framing crew that built the house was on site and realized that their rafters were 2' short and their ceiling joists were 2' long and someone had the brilliant idea that we discovered yesterday.
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Old 07-29-2010, 06:29 AM   #7
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Re: Roof Overhang Framing


I misunderstood what you said the first time i guess. what you just described is not what I have seen. I have only seen the ceiling joists run long over the top plate, on a lower pitch roof and that was supposed to maybe give strength to the rafter tails with a larger than normal soffit size.

I'm trying to picture what it is you actually have there with a 2x8 on the flat. sounds like a mistake that was fixed.
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Old 07-29-2010, 06:47 AM   #8
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Re: Roof Overhang Framing


Here's a sketch of how it was laid out since I didn't get any pictures of it.
Attached Thumbnails
Roof Overhang Framing-roof-detail1.jpg  
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Old 07-29-2010, 05:59 PM   #9
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Re: Roof Overhang Framing


i have seen it done ... its common around dothan ala.
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Old 01-21-2011, 07:26 PM   #10
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Re: Roof Overhang Framing


Quote:
Originally Posted by kyle_dmr View Post
Only thing that comes to mind is a curved, or a bell style tail. Or, like said above, used to build up plate height for either steep pitched roofs or large overhangs/
since its all trussed here what i see done for radius tails is this, well probably because the style here is a 20p with round tails in the front with 5p in the back. The overhangs are often about 2' and that would cause it to drop alot so what they do is they frame a little soffit and cantilever it over the plate and then they just chop of what sticks below the fascia and connect the fascia to the rafter with a little radius wedge, Good idea i think.
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Old 01-21-2011, 07:42 PM   #11
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Re: Roof Overhang Framing


I've seen that detail on steep roofs. It prevents the large overhang from causing the soffit to encroach on the window openings.
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Old 01-21-2011, 07:43 PM   #12
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Re: Roof Overhang Framing


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I've seen that detail on steep roofs. It prevents the large overhang from causing the soffit to encroach on the window openings.
thats what i meant haha
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Old 01-21-2011, 07:47 PM   #13
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Re: Roof Overhang Framing


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thats what i meant haha
Sorry Nick. I didn't read your post before I replied. Good call.
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Old 01-21-2011, 07:48 PM   #14
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Re: Roof Overhang Framing


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Originally Posted by loneframer View Post
Sorry Nick. I didn't read your post before I replied. Good call.
oh ok, post count is going up yes
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Old 01-26-2011, 09:09 AM   #15
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Re: Roof Overhang Framing


I've seen it done before, to get the right height, and i saw someone do it once to make the attic a little bigger.... it was a small garage and they stuck the floor joists over each side to make the soffit, then they bumped the rafters all the way out at the edge, it seemed like it worked pretty well, but i think i would be hesitant to ever do it...
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Old 01-26-2011, 09:36 AM   #16
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Re: Roof Overhang Framing


I did that once so the soffit would be above the round top windows. Also required headers above the top plate! The prints on this house turned out to be a mess. Th was the first house I framed that had a view, from above, of the roof hips and valleys. That should have warned me of problems to come, but I just took it as an added plus. Turned out the architect forgot to put in one of the valleys. On paper it was only a line, in real life it was a 24' long 12'' high microlam. That wasn't the end of it either.

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