Can I install siding, soffit, and fascia before roof shingles?
Installing siding and trim before shingles leaves the critical roof-to-wall flashing exposed and vulnerable to being redone. Doing the roof first ensures proper water-shedding integration where the materials meet.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Waiting for the contractor to return
- 2Installing weather shield underlayment as a temporary protection
- 3Installing a 1x3 inch board onto the vertical part of the flashing, pinning it to the house, and caulking across the top of the trim board.
- 4Removing siding to get the flashing in correctly.
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“Is it ok to install vintl siding, soffit and fascia cover before installing shingles?”source ↗
“Does that mean you’ll have to redo any flashing or trim once the shingles go on?”source ↗
“Just shingled my new shed and need to install flashing at the house. Suggestions on what type flashing to use?”source ↗
“The lowest full run of shakes is pretty far up from the shingles, so it's not looking very easy to slide flashing underneath.”source ↗
“But I am assuming a 90 degree flashing will not lay down on the shingles well and that trying to bend it down will simply make it look junky.”source ↗
Where this came up
People with this problem also raised
- 6How to fix cement fiber siding touching roof shingles
- 6Uneven shingles and bulges after new roof replacement
- 3Roofers left mono roof top exposed without a cap
- 4How to temporarily waterproof a damaged roof until replacement
- 13How to tell if roof flashing is installed wrong
- 2Why is the plywood roof decking sagging on my new house?