roof overhang plywood

16 x 16 cabin. 45 degree roof pitch. 5/8 plywood roof sheathing, tar paper then horizontal 1" x 4" x 8' boards 16" OC, then metal roofing screwed on top. The 1 x 4" boards will overhang 11", and the metal roofing exactly 1" beyond this (acting as a drop edge) - so total overhang is 1ft.

Im mostly using the 1 x 4 boards to simplify the overhang, without creating a complicated fascia board / ladder overhang with me awkwardly laying 16' in the air hanging over the roof edge.

Instead im considering just scrapping the 1" x 4 boards and just overhanging the plywood 11".

Would this work? Or would it be too flappy? Considering it would be an entire plywood section im assuming it would be stronger then 1 x 4 boards 16" OC. Actual 1 x 4 boards are 3/4" thick.

I originally got the 1 x 4 overhang idea from this video: https://www.youtube.com/watch?v=RexXz8JVGnA

Thoughts?

My short answer is no. :) 

Is this a permanent residence or an occasional use cabin? What kind of weather are you building for? Snow load? I'm not sure from your post if you are asking about the overhang on just the gable ends or the whole building. If your thinking about a plywood overhang all the way around will you want to collect rainwater? Were will you attach rain gutters? If you don't plan on having rain gutters do you have some other plan to get the run off away from your foundation? Critters are also something to consider. Where I am wasps ants mice ETC ETC will move into any and all cracks gaps or holes they can find and they seem to be able to find them all.


My opinion is build at a minimum to code and I tend to build above code.

Marty Mac wrote:My short answer is no. :) 

Is this a permanent residence or an occasional use cabin? What kind of weather are you building for? Snow load? I'm not sure from your post if you are asking about the overhang on just the gable ends or the whole building. If your thinking about a plywood overhang all the way around will you want to collect rainwater? Were will you attach rain gutters? If you don't plan on having rain gutters do you have some other plan to get the run off away from your foundation? Critters are also something to consider. Where I am wasps ants mice ETC ETC will move into any and all cracks gaps or holes they can find and they seem to be able to find them all.


My opinion is build at a minimum to code and I tend to build above code.

Permanent residence. Lots of rain. Gutters and non gable overhangs are already planned for - my only concern currently is the structural integrity of overhanging 5/8 plywood on the gable ends of the house shown in the diagram

My short answer stands:)

A good gust of wind will peal your whole roof off instead of just some metal. Sorry if I sound like  Debbie downer.
Can I suggest that instead of thinking about how to avoid doing the work of a fascia, change your mind set to how can I build this house to last a lifetime. You may be the one that has to put the next roof on it that would be bad enough. Even worse would be if you're no longer capable and have to pay a profesional to come back and bring it up to code for his insurance reasons.

Couple of ideas that might help making the flying rafter and fascia .

Will your house have any interior walls or a loft? Maybe you could use that lumber for scaffolding  then reuse it for the interior. Or possibly add a porch and/or lean to, then your soffit and fascia would be an easy reach.