ice and water
- Thread starter markzrt1
- Start date
Maybe I'm the one thats confused. Doesn't ice and water get applied on top of the OSB?
1320stang
Well-known member
I guess it would if you had a storm before you got it shingled.
Here in Oklahoma, we put 30# asphalt impregnated felt down, overlapping by about 6"-9" then shingle over it. If it's not heated I'm not sure you'll have to worry about ice dams.
poncho62
Well-known member
Looks like about a 5-12 pitch there..........probably could get away with just shingles, especially since you are not heating it. I would probably put tar paper 36 inches up from the end. ....You may want to put in heat in the future. Take that into consideration.
poncho62
Well-known member
I think he missed the word shielding...........Ice and water shielding......
PAToyota
Well-known member
Typically, under 3:12 slope and you want ice and water shield/guard over the whole roof. On a heated space, it is typical to do it up the roof slope to a point that is three to five feet inside the outside face of the exterior wall below to help protect against ice dams. The roof slope looks to be greater than 3:12, so I wouldn't see a need for full coverage and if it is unheated there is little reason to do the edge flashing - but if there is a potential to heat it in the future, I would go ahead and do the edge flashing.
Stuart in MN
Well-known member
I live in Minneapolis, and just had my unheated garage re-roofed a couple weeks ago. The roofer included ice and water shield in his bid, and I would have asked for hime to put it on even if he didn't. As mentioned above, it's cheap insurance.
6768rogues
Banned
Most codes specify ice and water shield to two feet horizontally inside the outer wall. Without heat it is not as important, but I would put it on anyway. On a sunny cold day, the upper roof area might melt and run down to the overhang area, where it can freeze. Instant ice dam on an unheated building.