R905.8.1.1

Section 905.8.1.1 is titled 'Solid sheathing required' and covers requirements for roof coverings. The requirement for solid sheathing on that portion of wood shake roofs where an ice barrier is used and there is a specific average daily temperature or less in a specific month is established. The purpose of this section is to prevent water damage to the building.

The model shows a roof section with partially spaced sheathing and partially solid sheathing where an ice barrier is required to be installed and the average daily temperature in January will be 25°F or less.