hand drive

a 2x4 with the roof angle cut on top of it should work fine to terminate the edges of the overhang. just cut the bottom long point so it lines up to the backside of sub fascia. you can hold 2x block up next to rafter and level the block while scribing rafter angle onto block with pencil. connect block where it butts to the house on the outside corner and you should be good to go...

you want to line up the front top edge of sub fascia with the pitch of the roof rafter and the roof sheathing will come out onto the sub fascia a little bit, no need for a bevel as long as the top edge is not to low or sticking up past the pitch plane of roof.

markharmon

Is there directions online for the cornice box? So, If I don't bevel cut the top edge of the sub fascia then how will the sheathing lay flat?

ubcguy89

you are talking about a plumb cut not a bevel. you should nail a 1x6 to the rafter then cap it with coil. then you butt your j channel to the capped 1x and that will do it. your drip edge will cover your capped 1x at the top

ubcguy89

you will need to make a plumb cut on the 1x

ubcguy89

also you will need to make it match your entire rafter including your tails

markharmon

Do you know how to or know of directions online to make a soffit return box?

ubcguy89

yes I know how to frame them, they are actually called gable end cornice returns. without an over hang they really cant be done without complicated moulding and I take it your not a professional since your asking this question. I would stick with what I said about the 1x unless you pull sheathing off and frame an overhang over your gable

markharmon

What did you say about the 1x again? How much of an overhang on the end gable would be needed? My soffit overhang is 6". If I don't add any overhang to the gable end do you have any idea what I can do for a flush fascia piece of cover the vinyl siding on the rake wall?

jagans

Install a barge board, then a pre-primed 1 x pine rake board. The Barge will be 1.5 inches projecting out, and the rake board will hang down about 2 inches past the bottom of the barge board. This will give you a pocket for your siding. Put the siding on before the rake, of course, so you can tack the top in. When roofing, install felt out to face of the rake. Install drip metal, then envelope with ice dams, then extend shingles 1 knuckle (Inch) past the break in the metal.

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markharmon

Do you know how to frame soffit return boxes? Do you have to have a end gable rake overhang to have a soffit return? I can't seem to find anywhere online with instructions.