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Fascia Challenges With Inconveniently Cut Rafter Tails

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7.3K views 22 replies 6 participants last post by  Nealtw  
#1 ·
Hi all,

As I detailed in an earlier post, I'm in the middle of a gutter replacement project on an old home in which I'm replacing warped old copper K gutters with new copper half round. This has also evolved into a fascia-replacement project, as I've found there to be an unacceptable amount of rotted wood hidden behind all of the aluminum fascia wrap. I've been replacing it with painted cedar. As I've been doing so, I've found that most of the rafter tails have been in pretty good shape, and any that have rotted I've been able to fix with Abatron's fabulous LiquidWood + WoodEpox. This has always given me plenty of "new" meat to nail new fascia into.

I ran into an unexpected problem when I pulled off the porch fascia - it appears that when the house was built (Early 50s), for whatever reason the rafter tails were not properly notched, leaving VERY little meat into which the fascia could be nailed. Here are a few photos:


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As you can see, the tails were not notched to fit over the face of the porch's main support beam, and the horizontal cut leaves very little exposed tail. The builder appears to have nailed 2x4 scraps to the bottom of the rafter tails to lower the soffit so that it aligns with the lower fascia. Some of this has rotted out (along with the soffit itself, which will have to be replaced).

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I've never seen this. Has anyone else?

The simplest thing to do would be to just repair or replace anything that's rotted and slap on a new fascia board in the same manner as the old, but I hesitate to do this for two reasons:
1) I don't like the idea of fascia (and, by extension, heavy copper gutters) relying on two nails so close to each other in such a small area of rafter tail (I'd much rather space two nails vertically a few inches apart like you'd normally do)
2) The new half round gutters I'm using have different mounting considerations than the old K gutters. Let me explain more about (2):

The new gutters use a thick cast brass hanger that relies on two #12 x 1-11/16" stainless screws. As I detailed in a thread I made earlier, I think 3/4" thick fascia is too thin to support this. I solved this problem on one area of the house by using 5/4 (nominal, so 1" thick) cedar. I think this is just thick enough to be acceptable. Here's what that looks like:

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Normally, I would just repeat this solution (using 5/4x instead of 1x) for the porch fascia, but the roof line here is a bit too close to the fascia. That is, the edge of the slate is only about 1-1/2" proud of 3/4" thick fascia, which is closer than at any other part of the house.

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The new cast brass hanger pushes the back of the new half round gutter 1/4" away from the fascia, and with no drip edge and the capillary effect to contend with, slow water would just barely trickle behind the gutter according to a hose experiment I did. Long story short: I pretty much have to use 1x (3/4" actual) lumber for the fascia here in order for all of the water to be collected at all levels of rainfall.

This led me to thinking that the hangers (which will be spaced 24" apart) can be drilled into one out of every three rafter tails (which are spaced 16" on center), which might compensate for two out of every three only being drilled into 3/4" wood. The problem here is that since the rafter tails are so narrow, some of the hangers might fall in line with the 2x blocks in the pictures and not the rafter tails themselves, or even screw into the seam between them.

I'd love to hear some creative advice here. I've been spitballing a few ideas and would love some feedback.

Idea #1a: Block the rafter tails

The idea here would be to fit a 2x4 in between each rafter tail and secure each end with something like a pair of Kreg Blue Kote outdoor pocket hole screws, leaving the face of the 2x4 flush with the rafter tails. Something like this:

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This would provide many of the benefits of a sub fascia, giving plenty of meat to nail in a 3/4" fascia board anywhere I want, and giving me the ability to screw in the gutter hangers wherever it's most aesthetically pleasing.

Idea #1b: Block the rafter tails (alternate)

Same as above, but instead of relying on pocket holes in the flimsy bottom blocks, I make a mechanical connection to the top of the porch's main support beam by affixing a single "fake rafter tail", or two of them, made out of 2x lumber through a pair of pocket holes. I did this twice before over the breezeway, where I wanted another block of wood to nail fascia into. Here's what I mean:

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The idea would be to screw in one:

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.. or two "fake rafter tails"

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and nail the 2x4 block to them, and also affix the top two corners to the real rafter tails.


Idea #2: Cut the rafter tails and install sub fascia

This seems a bit more radical. This is obviously typically done before the roof is installed during construction, but is there any way to retroactively cut off 1.5" square and affix a 2x sub fascia? The roof is slate, so lifting up a bottom row is not feasible. Has this been done before?


Idea #3: Sister each rafter tail and cut it square and at full width

This appears to be a more conventional approach, but it comes with a significant drawback for my project - It would eliminate my ability to place the gutter hangers wherever it's most aesthetically pleasing/symmetrical. I would be tied into the "drill into one out of every three rafter tail" setup, where two out of three hangers only affix to 3/4" of "meat". Also, the roof of the porch is enclosed, so it would be somewhat difficult to sister the tails far up enough to be structurally sound.


That's where I am at this point, scratching my head and sleeping on it. Can any of the pros comment on my hair-brained ideas, and possibly offer alternate solutions?

Thank you all so much in advance!
 
#3 ·
Sounds like you've got it figured out basically.

The contractor buggered the cut on the rafter tails on one side of my shop. They sistered up each and cut them right.

Fast forward to my roof redo 4 years ago... Several of my rafter tails are split or need to be extended. Sistered them up with longer material with the right cut on the ends.
 
#4 ·
Thanks for your swift reply. Which of my potential solutions are you suggesting? #3? Sistering them seems standard, but I can't go far up the rafters without opening up the porch ceiling.
 
#9 ·
A guess. I think the rafters are attached to a beam inside. The tail is not bearing the load. Small piece under the tail is just a filler. Can you put your hand in there and feel for the lumber under the tail? Maybe double? Per your idea, blocks between the tails but just screw it to the "beam". Predrill and not to sink the screw head too much and stay away from the blocks edge. Will not split it that way. At least 3" screws and predrill hole and screws at down angle with longer screw may give extra insurance.
If roofing is still there, I would add drip edge still, even if face screw. Every 3-4'. First cover the whole assembly with sheetmetal cover. Drip edge goes over it. Photo and measurements record so you know where to screw for gutter brackets. Predrill the bracket holes. DIY so you can be as time consuming/careful as you want.
 
#10 ·
Your intuition is spot-on. The rafters are, indeed, attached to the porch's main support beam. Each of them are toed on the right:

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It might be tough to see in that photo, but the main support beam looks like it's two 2x12s affixed together.

To your point about just screwing the blocks to the beam, I'd have a problem with how far away the beam is from the fascia (about 5"):

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That's why I thought that I could go with a perpendicular 2x4 affixed to to the beam (like in my breezeway "fake rafter tail" photo earlier) to create something to nail the block into:

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And then connect to the rafter tails via pocket hole screws:

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Reading your posts and everyone else's, though, I see another option where I could cut 90 degree 2x4 blocks and screw them adjacent to the rafter tails like @Nealtw suggested (and maybe bevel the top for some more "meat"), but instead of making this flush with the rafter tail, cut it 1.5" short so the full 2x4 block can fit over it. Then I can affix the full 2x4 to these on either side of the cavity with something like a pair of 10d nails. Here's a rough sketch of what I mean (pardon the annoying angle. My ladder was in an inconvenient location):

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Does that make sense?
 
#12 ·
One of the reasons I keep leaning toward tail-to-tail blocking is that this would give me the ability to place the gutter hangers wherever I want. As a bonus, I can stick to the more cost-effective home depot/Lowes 1x8 cedar boards that are only 11/16" thick, so this would actually pull the gutter even closer to the house than true 3/4" boards would, making me more confident that slow rain won't drip behind the gutter.
 
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#14 ·
I think I finally realized with @Randy Bush meant when saying to turn the blocks 90 degrees. Do you mean rotate them so that the end grain is facing upward, and the face block screws/nails into the grain at a 90 degree angle? Like this modification to my earlier photo?

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Another question for the mind hive: What size/length screws and/or nails should I be using? For the inner block, I think it makes sense to use screws, since the cavity leaves me little room to hammer. I have a bunch of #9 x 3 coated deck screws left over from a work bench build, would these be fine for that? Or is there something else more ideal for this purpose?

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As for the face/outer block, what would be better to use to affix it to the beveled inner/sistered block? I have a box of 3" stainless 10d nails that I've been using for thick cedar fascia, but stainless shouldn't be necessary on the inside since none of it's cedar. I also know very little of the "screw versus nail" debate for stuff like this.

Thanks again for the advice. As you can tell, I'm a "do it once, do it right, and maybe over-engineer it a bit" kind of guy.
 
#16 ·
The deck screws are fine for those blocks inside.
Might find it easier to predrill the blocks for screws before installing them. Less likely to split a block.
Thanks again for the quick and informative reply!

I definitely do pilot holes for anything I screw. I also use paraffin wax on the threads. No problem.

What do you think about using the same deck screws for the outer/face blocks? As in this modification to an earlier photo:

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The deck screws are coated, so I doubt I'd have to worry about rusting in the future, especially since this will all be covered by the fascia eventually.
 
#18 ·
Looking for a minor clarification regarding what @Randy Bush meant when saying to turn the blocks 90 degrees. Grain facing upwards as in this photo, right?

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Then the outer/face block will fit over two of these inner block, and be affixed with two deck screws:

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I noted in the first photo that I will likely eliminate the lower blocks; all of them are wider than the rafter tails, making it impossible for the outer blocks to fit flush on both sides of the tail. Whether I cut new ones remains to be seen - I can easily nail the new soffit into any of the new lumber pictured above.
 
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#20 ·
Fabulous. Here we go:

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Rock solid. And just because I'm a bit OCD about my work:

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#22 ·
I always found it strange that this house has no soffit vents. All of the soffits are 1x4 dimensional lumber. This did concern me regarding my attic, but it does have a powered gable vent fan and six air intake holes on the opposite end. Also, most of the fascia allows for minor gaps against the roof decking, so I always figured that the builder saw this as adequate ventilation.

The pictures in this thread, however, are for a non-enclosed porch. The insulation concern shouldn't apply to this, no?
 
#23 ·
I always found it strange that this house has no soffit vents. All of the soffits are 1x4 dimensional lumber. This did concern me regarding my attic, but it does have a powered gable vent fan and six air intake holes on the opposite end. Also, most of the fascia allows for minor gaps against the roof decking, so I always figured that the builder saw this as adequate ventilation.

The pictures in this thread, however, are for a non-enclosed porch. The insulation concern shouldn't apply to this, no?
No a porch would not count, but the 1x4 could be changed out for vents, then you would want air chute to keep a clear space next to the roof. All for another day I am sure.