In essence, it is the same thing that happens when we hold a sheet of paper on the short side and place it next to our lips. If we blow over it we will see how it rises.
This is due to the so-called Bernoulli principle , in honor of the Swiss physicist Daniel Bernoulli, who first stated it in 1738. Thus, when a fluid, be it a liquid or a gas, moves at great speed, the pressure decreases.
Aircraft wings , for example, are designed so that the flow of air over them goes faster than that underneath . This causes a pressure difference whose resulting effect is the appearance of a lifting force.
Something similar happens in the case of the roof : as the air that travels overhead goes at high speed, the pressure exerted on it is less than that exerted by the air inside the house. The net effect is a force that pulls the structure upward.
Now, it may happen that this pressure difference is not enough to start it. In this case, the air enters the house through the openings, the pressures equalize and, consequently, the roof collapses on the house, causing it to collapse.
