Ventilate the attic spaces above and beside the top storey separately by using gable vents. Position the vents to prevent wind from blowing through the insulation.

A second option is to use gable vents in the area above the attic ceiling and eave vents in the side areas. This is a good option if the house already has working eaves vents (see Figure 5-19). A ventilation space in the rafter section will permit airflow between the insulated areas.

Otherwise, you will have to install rafter vents in the section along the rafters to ensure adequate ventilation (see Figure 5-18 and Figure 5-19). These vents must be on the cold side of the space, while the warm side can be filled with insulation that can be added to the sloping ceiling portion unless other arrangements are made in the renovation process.