The isolation between the cellars does not work, because the attic must be ventilated, and the isolation of the cave would be between the unheated spaces. You can add insulation to the sun as much as possible. Additionally, make sure the attic is well ventilated. Cold ceilings avoid ice dikes.

The insulation between the Chevrons will be useless, because the attic should be ventilated, and the insulation between the Chevrons would be between two unheated spaces. You can add insulation to the ground plus the best. Simply don't put it in the holes.A good ventilation, ceiling ventilation and a crest ventilation, will stop this.

The insulation between the chevrons will be useless, because the attic should be ventilated, and the insulation between the chevrons would be between two unheated spaces. You can add insulation to the better ground. Do not put it in the holes. A good ventilation, ceiling fans and a crest fan, will stop this.

The insulation between the chevrons will be useless, because the attic must be ventilated, and the insulation between the chevrons would be between two unheated spaces. You can add the insulation to the ground at best. In addition, make sure the attic is well ventilated. Cold ceilings avoid ice dams.

Is it possible to isolate a flat ceiling from the interior, from the ceiling of the lower area? Is it technically feasible to isolate a ceiling from the interior what is called the beginning of the cold roof. This system has often been used in the past, but is not recommended today. In fact, it can cause long-term damage.