I am installing a double fascia (1″x8″ and 1″x4″) to the eaves and gables of my new house.
My question is: does the roof deck extend over the top edges of the fascia boards so that the fascia boards are tucked underneath the roof deck,
or are the top of the fascia boards brought flush to top of the roof deck?
I have seen details in “how to” books showing both methods, or a combination where the inner fascia is tucked under the roof deck and the outer fascia is flush with the top of the deck. It seems that it wouldn’t matter since all the edges are covered by drip edge and shingles anyway…but I would like to know what the experts think.
Replies
Yes.
Andy Engel
Senior editor, Fine Woodworking magazine
An updated profile is a happy profile.
Other people can talk about how to expand the destiny of mankind. I just want to talk about how to fix a motorcycle. I think that what I have to say has more lasting value. --Robert M. Pirsig
None of this matters in geological time.
Hope you didn't take offense at my first reply. I've seen it done both ways, and don't think it matters much.
Andy Engel
Senior editor, Fine Woodworking magazine
An updated profile is a happy profile.
Other people can talk about how to expand the destiny of mankind. I just want to talk about how to fix a motorcycle. I think that what I have to say has more lasting value. --Robert M. Pirsig
None of this matters in geological time.
The outermost top edge of the outermost fascia board should plane in with the top of your roof sheathing. At least that's how I do it. This allows your drip edge to lay flat and still be supported.
But either way is probably fine. If you really want to get cute you can rip the the top edge of your fascia to plane in and either come up under the sheathing, or plane in with the top. If it's getting metal drip edge I skip this step.
Use a straight edge (speed sguare) to keep the outer edge in plane with the sheeting. I would think bevel ripping would monkey with the corners where fasia meets rake lining up. I would trim the rakes as the miter usually end up being longer than the fasia is wide (also b/c I try to do this when the gables are framed and sheeted prior to standing) then hang the fasia to mate the rakes, using wider stock if necessary.
either or ...
wood's wood.
it's either supported by the sheathing ... or by the fascia.
and it's good practice to not hold it too tight to either ...
myself ... I prefer the wider flange drip edge.
Jeff
Buck Construction
Artistry In Carpentry
Pittsburgh Pa
Are these are nailed to sub-facia?
I think as an old framer that the stronger way is the better way. The decking should always go over the fascia. Then you apply shingle mold or drip flashing or both over the plywood edge. That way you get edge nailing for the plywood and a much better connection. When you lay out the sheeting just snap a line about 48 and 3/8" if it's a 12/12 to prevent the sheeting from interfering with the drip edge. If your rafter is square on the end and not a plumb cut then flush the sheeting with the fascia. The standard on the west coast is that the fascia is installed before the roof is sheeted.
I like open tails. My detail is a 3x8 tail with an exposed lid of old barn wood. No fascia or soffit.