should the plywood be flush with the sub facia before installing drip edge on a 12/12 pitch?

Question

i dont know if i should over hang the plywood

Answer 1

Yes, the plywood should be flush of slightly shy of the outside of the sub-fascia board. If not, whatever you decide to use to cover the sub-fascia (aluminum cap, plowed cedar, hardi-trim board, ect.), will hit on the plywood under the drip edge.
In my experience with siding, this is one of the most common mistakes. I often would end up cutting back the decking with a saz-all, damaging the drip-edge, and roofing material. This would require a return of the roofer, to make repairs.

Answer 2

the roof sheathing on a 12/12 pitch roof should be about 1/2 " back assumeing ur running the sheathing before the facia is installed.....here's a tip:

take a small scrap of the sheathing and a 2' piece of the facia....from ur ladder, hold the sheathing on the roof and slide it down to where the bottom edge of the sheathing is flush with the edge of the rafter or sub-facia...then hold the facia up to it....remember to hold the facia at th angle of the roof( we use a speed sq. and hold it on the sheathin and let it stick over about 3 inches and push the facia up until it just touches the bottom of the speed sq....u can use a 12" 2x4 for this or anything straight...

once u've done this look at the gap between the sheathng and the facia, u dont want more than a 1/2" gap between them......once u have adjusted the gap by sliding the sheathing up or down, hold the piece of sheathing in place, drop the facia piece, and measure how much if any the sheathing is hanging over the rafter or how far from the end of the rafter....

go to other end of the roof and make that same mark, what u measured, and pop a chaulk line from each mark to each other....run ur sheathing to this mark and this will keep ur plywood the same distance from all the rafters and keep ur sheathing sq.....

un ur facia and remember to use ur speed sq to keep the facia flush with the top of the sheathing like talked about above and ur ready to install it.......

lic. gen. contractor

Answer 3

I usually take the plywood to the top outside edge of the sub fascia so it does not interfere with the fascia. I install the fascia flush with the top of the sub fascia. Installing the fascia before sheeting the roof solves a lot of problems. Chalk your line up the rake 48" from the point where fascia meets sub fascia. Run fascia the thickness of the plywood higher than the fly rafter on the gable and flush on the sub fascia. Trim the length down the rake and nail it all off before sheeting so you don't have to get on a ladder or lean off the edge of the roof.
Cut the bottom of the rake piece level at the bottom of the fascia to establish the bottom of your bird boxes.
What you don't want to do is install it running long and have to snap a line and cut it off from a ladder or standing on the roof. It's dangerous and time consuming.

Answer 4

Sub Fascia Board

Answer 5

different terminology for different parts of the world!!!!
I would over hang the osb.... you can snap a line and cut it off at a later time if it is incorrect...