You can add 3 to 5 inches to the top.
Minimum roof overhang length.
The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope.
This will keep rain away from your shed.
The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed.
Too little can allow water to seep into rake or fascia boards.
This will protect a roof from most types of damage.
With that in mind we kept a roof overhang at the eaves as it provides a nice shadow line and protects the second floor windows from a bit of the summer sun.
If you only have 1 2 inches 2 5 5 1 cm of overhang you likely need to go with this option.
16 foot and taller 24 inch overhangs.
The exceptions include enclosed overhangs on open sidewalls i do not like the look and they become a nesting place for small flying critters and birds.
At the rakes however with a nod to yankee frugality and clean modern lines we kept the roof trim as close to flush as practical while still allowing for a rain screen channel.
You do not need more than 2 feet 0 61 m of total overhang for your building to stay safe and avoid water damage.
A shed overhang is an easy and effective way to protect your shed.
Two feet is the general maximum length for a typical roof overhang.
12 to 16 foot eaves 18 inch overhangs.
4 choose to extend the preexisting rafters to add 2 9 inches 5 1 22 9 cm.
A typical metal roof overhang may be 2 to 4 inches or even less.
Another exception would be along eave sides with doors for weather protection longer overhangs generally work best.
According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following.
This can make extensive roof overhangs more trouble than they are worth in all but the harshest climates.