An online community for people who love old houses.
Fascia vs. Decking
I'm re-roofing a section of my front porch. With the old roof, the fascia board attached in front of the plywood decking as in attached drawing B. The top of the fascia was nailed into the edge of the plywood. I think in makes more sense, however, for the decking to cover the top of the fascia board as in drawing A, with the plywood nailed into the top of the fascia. I've googled and found diagrams done both ways. Is there a "correct" way, and if so, why?
LR
LR
Views: 9
- Attachments:
-
-
fascia.JPG, 22 KB
-
Replies to This Discussion
-
Permalink Reply by Phil on -
Traditionally, that roof would not have had plywood decking, rather it would have had planked boards. You need to have some sort of drip edge to keep the water from running down the fascia and causing problems. Slate is its own drip edge, so if your house was originally slate, that may explain why the fascia covered the roof planking. If you are using asphalt roofing, though, you will need the roof decking to cover the fascia so that you can put a metal drip edge on the decking. I don't see how that can be properly installed on fascia. Others here may know better.
-
Permalink Reply by LeRoy Williams on -
Thanks for the reply. I didn't provide enough information. The roof had been re-done, probably many times over the years. I used to worry about keeping things original, but at this point, I just want it to last and meet codes. I'm pretty sure the original roof was cedar shakes nailed to 1x4 boards. Last time around, they used half-inch plywood, asphalt shingles, and metal drip edge. I plan to do the same. The whole reason for this job is that the old framing was no longer attached to the wall properly and was sagging, making the roof bouncy. The framing was pretty beat up, and was due for replacement.
-
Permalink Reply by Mike Stoffo on -
I think I prefer B and the new constuction I've seen tends to do it this way. I hate plywood edges exposed, even if it was painted and tucked behind drip edge, just a quirk of mine. I suppose if the drip edge adequately sheds water away from the joint it doesn't matter. The drip edge plus ice-water barrier or roofing paper plus shingles, the joint is well protected, it would be an extreme case for water to get behind B. Then again , it doesn't hurt to build with extreme cases as a consideration. I still prefer B. I would just nail to the rafters though; I don't like nailing into plywood "endgrain" the laminations could seperate, not that it's going anywhere in this application though.
© 2012 Created by Community Host.
Old Houses | Restoration Products | Report an Issue | Terms of Service
