The Roof Inspection

I. The inspector shall inspect from ground level or the eaves,  when applicable.

1. the roof-covering materials;
2. the gutters;
3. the downspouts;
4. the vents, flashing, skylights, chimney, and other roof penetrations; and
5. the general structure of the roof from the readily accessible panels, doors or stairs.

II. The inspector shall describe:

1. the type of roof-covering materials.

III. The inspector shall report as in need of correction:

1. observed indications of active roof leaks.

IV. The inspector is not required to:

1. walk on any roof surface.
2. predict the service life expectancy.
3. inspect underground downspout diverter drainage pipes.
4. remove snow, ice, debris or other conditions that prohibit the observation of the roof surfaces.
5. move insulation.
6. inspect antennae, satellite dishes, lightning arresters, de-icing equipment, or similar attachments.
7. walk on any roof areas that appear, in the opinion of the inspector, to be unsafe.
8. walk on any roof areas if it might, in the opinion of the inspector, cause damage.
9. perform a water test.
10. warrant or certify the roof.
11. confirm proper fastening or installation of any roof-covering material.

From International Standards of Practice for Performing a General Home Inspection – InterNACHI http://www.nachi.org/sop.htm#ixzz2XVH1yJA3