How does DELTA®-DRY provide ventilation?
DELTA®-DRY has a unique dimple structure that creates maximum free area with minimum contact with the wall sheathing. With a contact area of less than 9%, air may move freely across the wall in all directions. The ventilation cavity must be open at both the top and the bottom of the wall for any ventilation to occur. Several natural forces will create ventilation in the cavity. Differences in air pressure (wind) will move air through the ventilation cavity. Normal convection currents within the wall cavity will also move air. Warm moist air will rise and exit through the top ventilation while cooler drier air will move in through the bottom ventilation to replace it. Both of these natural forces will cause air exchanges within the wall cavity.
