If the crack is in your ceiling hot air in the attic can draw/suck cold conditioned air out. It happens through a natural principle of science call convection.
Net free venting requirements for residential construction states that we should provide a “balanced” air flow for attic ventilation. 50% of the air needed to cool your attic should enter at the edge of the roof…down near the windows. 50% of the required openings should be as high as
Warning :: This topic includes concentration, calculation and brand specific data that could be harmful if not used with care. Enter at your own risk. Comments and opinions that stretch beyond the Standards of Practice (SoP) for a Visual Home Inspection can