Placement and Size. Wingwalls from the ground to eave on small
scale buildings are effective for wind incidence angles from 20 to 140
degrees. Wingwalls can be thicker than shown in the preceding figures.
Projecting bathrooms, closets, entrances or other architectural features may
serve as "wingwalls."
Thermal Considerations. Wingwalls may also serve as solar shading
devices, and are especially useful on southeast and southwest facades. Refer
also to para. 4.5.6.