No Overhang Flat Roof

Types of roof overhangs.

No overhang flat roof.

Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. No roof leaks no problems. As a rule there are two popular methods in framing it pant or flat roof overhang and gable roof overhang. Ways to frame the roof overhang.

I can understand not wanting one with a flat roof but the sloped roof without overhang i never understood. However in many situations the insulation may need to be primarily or entirely below the flat roof membrane and between the roof joists if so what are the best options. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. With the west east overhangs the main use is siding window protection and keeping rain snow from foundation.

There is also no gutter in the detail so you will be effectively routing rain down your wall. We love the look of the no overhang scottish style roof line as well. You may want one or the other or both. Martin and jon are right that a roof overhang is the best way to protect the siding.

If the roof overhang is not big enough then the only way to protect these windows doors and entryways is by recessing them into the thick exterior wall or by installing special casing and flashing for each door or entryway. Because there is so little danger of water damage there is no required overhang and overhang lengths are minimal and sometimes nonexistent. No air leaks from underneath no problems. Unvented flat roofs a technical discussion flat roofs have often been built with the insulation all on top of the vapor closed drainage plane as this avoids dew point condensation issues inboard of the roofing.

There are two types of roof overhangs two consider. A rake is an overhang located on the gable end of your roof. With our house we are planning minimal east and west overhangs and ample south and north overhangs. There is no good way to make that last.

Overhangs add character and help your shed avoid that boxy flat look. In general roof overhangs offer an effective solution for how to protect windows doors and entryways. A rake overhang is created by extending the roof beyond the gables of your shed. Additionally forming this needs to pay attention to the edge of your roof.

Moderate climates in moderate climates there is some damage of wood decay and a roof overhang is recommended. Smart vent a special roof eaves vent product that provides a 3 4 opening about 6 above the top of the roof drip edge.