It will primarily depend on the roof.
Roof overhang without soffit.
However if the home has no soffit it is quite a different matter.
Proper locations for another sketch of soffit construction and soffit ventilation details.
Some home designs do not have a soffit.
Venting a roof without eaves.
Overhangs are common in most house designs providing protection against both wind and rain.
One great alternative to a soffit ventilation system is to install an intake vent right at the lower edge of the roof.
The venting drip edge seems to be the easiest and most common way to go.
On buildings where the top of windows are close to the top of the building wall there may be insufficient space to construct an overhanging roof eave without blocking the windows.
Un vented roof solutions to buildings with no roof overhang and which are a more distant second best approach are discussed at roof venting.
Tips for roof eave venting on roofs with no overhang or soffit dci products.
Un vented hot roof solutions.
With a soffit venting is not much of a challenge.
The siding underneath the overhang is known as the soffit.
Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction.