My house has solid sandstone rubble-filled walls. Some of the gable and internal gable walls stop a bit short of the breathable roof underlay. There is a rough gap (which is stepped due to the roof incline) between the tops of the walls and the roof underlay.
Should I seal these gaps to stop air flow behind the PU insulation boards that will line the walls? If so, does anyone have any rodent-proof fillings?
Or should I retain the air flow to help remove any condensation and seal the gap between the tops of the PU insulation boards and the walls
Should I seal these gaps to stop air flow behind the PU insulation boards that will line the walls? If so, does anyone have any rodent-proof fillings?
Or should I retain the air flow to help remove any condensation and seal the gap between the tops of the PU insulation boards and the walls