Please follow the following link.
The International Standards of Practice for performing a general home inspection are outlined on the InterNACHI website.
There are guidelines in the following areas:
Standards of Practice
3.3. Basement, Foundation, Crawlspace & Structure
3.9. Attic, Insulation & Ventilation
3.10. Doors, Windows & Interior
From International Standards of Practice for Performing a General Home Inspection - InterNACHI http://www.nachi.org/sop.htm#ixzz31XtG52RD
To become a member of one of the provincial organizations of CAHPI, an inspector must meet rigorous professional and educational requirements followed by a review. They must also adhere to the association's code of ethics which demands fairness and impartiality towards clients.