Last July, I installed a Velux Self-Flashed ventilating skylight in my house on our 12/12 roof. The roof was reshingled about 6-7 years ago, but done poorly/sloppily. (We’ve only owned the house for 2 years)
There’s less than 7 squares of roofing for the whole house, so we’ve considered reroofing in the next couple years with a different color shingles that my wife would like better, and to fix problems with the flashing, etc that should’ve been addressed when it was reroofed last.
If there’s a self-flashed skylight installed, does it need to be removed to reshingle? (How do you get old shingles out from underneath the bottom? How do you install new ones up to bottom of rough opening if the skylight is left in place?) Or is there no option, you have to remove it? If you DO have to remove it, would you replace one that’s 5 years old, or reuse it?
OK, so I have a skylight already in that doesn’t leak. Would you pull it out and replace it with a curb mounted model? If so, how far around it would you remove roofing so you could install new felt paper to wrap the curb?
Good news: Velux makes a vented curb mounted model in the same size (Same inside curb dimensions) as the roof opening of the self flashed model I have.
Would you use 2X4s for a curb or 2X6s on a 12/12 roof? Why?
I suppose a roof could be reshingled around a curb-mounted skylight w/ no issues, then? So if I do this this year, and reroof in 3 years I can do that w/o removing the skylight, etc?
Also, once I went and looked at how a curb is sealed from water, and how the self-flashed units work, I understand the difference and see why the curb would work better. Why couldn’t I have seen that BEFORE I put this one in!? :roll:
Hello,
Nate r wrote
“Why does the high slope make more sense to not use a curb?”
Chances are since you are in snow country that the snow will sit on the backside of the 2x6 curb and run a freeze and thaw cycle increasing the chance that water will find it’s way in. With no curb it has less chance.
With a high curb, peel&stick wrapped around frame and flashed rite you wont have a problem(we never have)but one reason is skylite itself is away from roof,less of a chance of snow or rain backing up and under skylite.
self flashing skylights just dont sell in new england because they leak. even the velux rep has said that. you need to have step flashing. If you use them great, I care to much about my custumers to play russian roulette with there roof.
As Lefty stated you will make a larger snow catcher than the original skylight,Thus holding more snow and running the risk of water finding it’s way in.
I totally agree that solid I&W around the skylight is important and I would use Grace for that as it will fold and conform better than several other brands out there.
