We are building in our roof for more storage space. Our house was built in 1943, and is a ground level cavity brick with tiled hipped main roof and a smaller gable extending out 1.5 m over the front Lounge Room. To try to combat the ever settling dust, and to keep what is stored there from disintegrating in a Brisbane summer, we are considering insulating and lining the underside of the rafters, and/or installing ventilators. However : * There is some natural ventilation through the...

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