Sequence of Siding and Roof Installations
BrunoF
| Posted in General Questions on
I can see the pros and cons to installing the siding first and also the roof covering first, but overall which order of operation is likely to result in a better finished product with the least amount of collateral damage?
if the siding and paint go first, there is no risk to overspray getting on the roof or having the shingles or metal damaged but I am not sure how the roof to wall flashing details will get done properly. If the roof goes first, the flashing details seem easy but then there will be some damage and risk of overspray to the roof with the siding and paint crews walking all over it.
so…which order is preferred?
thx!
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Replies
BrunoF,
The roof has to be completed before the siding. You can't flash it otherwise.
Malcolm with the answer, but I'd also like to get the roof on as soon as possible. No good comes from getting everything wet, and bad weather and delays are simultaneously unpredictable and completely predictable.
BrunoF,
The is a way to do this that gives you the best of both worlds:
- Install you roofing underlay and run it up the walls of the dormer a foot.
- Run an L flashing with a 1" hem on the dormer 6 1/2" above the roof sheathing.
- Install and finish your siding above this.
- Install the roofing.
- Slide a 5/4 x 6" water-table under the L flashing.
The big advantage to this comes 20+ years from now when you re-roof and come to replace the step-flashing.
Malcolm, I think I understand your suggestion, but do you happen to have a picture or sketch of this detail?
rocket190,
Thank you. Great idea. Allows nailing the step flashing on the dormer side instead of through the bottom, and for future replacement of the step flashing without taking the siding off. Thanks!!
rocket190,
I've been thinking a lot more about details like that since reading about Ted Benson and his ideas around Open Building.
https://www.greenbuildingadvisor.com/article/the-bs-beer-show-open-building-systems-with-tedd-benson
This my sound like a silly question to those of you in the industry but won’t my standing seam metal porch roofs get damaged with a siding and paint crew working on them?
BrunoF,
Not unless they are idiots. It's something that occurs on every house with dormers or lower roofs.
Well, we found a different roofing company to handle the job and so far they have been great. Since I will have a silver roof (asphalt shingles and metal) and have clay soil, it was highly recommended not to have muddy feet waking on the roof so it has been extensively pre-flashed and the siding and paint will go up next.
It seems that this is how most builders do it around here and maybe I didn’t have the best roofer initially as he refused to pre-flash for the shingle areas.
How did you pre flash step flashing? Also they make masking plastic (think films that cover windows) and sell at most paint stores that you can use to protect standing seam while you work. That certainly seams like a backwards order of operations but I am genuinely curious what the step flashing looks like, did you use Malcom’s suggestion of the 1x6?
Freyr. I will need to talk to the outfit to get the full plan but it looks like they put the ice and water shield in the valleys, stepflashed the side walls and put kick out flashing where needed. I haven’t inspected the headwall flashing yet but it is there. My guess is that this is all redundant and will form a “base layer” to then receive the normal treatment and detailing when they put up the shingles.
I’ll confirm the overall plan on Monday for the group.
BrunoF,
Something doesn't add up. Those flashings need to go on either as the shingles are laid (step-flashings), or after (end-wall). If that is a base-layer it will be a second redundant one. You can replace the shingles on a re-roof while leaving the flashing in place, but it is a very second best solution, and shouldn't be used on new construction.
BrunoF,
What's a Silver Roof?
Malcom,
Silver is just the color. ‘Silver Birch’ to be exact.