Not all houses do.
Do all houses have attics.
Some very old homes have attic access only through a removable vent panel at a gable end wall of the roof.
Heat would be lost in cold climates.
Does your house have an attic.
Although a minimum of one attic access opening is required by the building code for homes that meet that minimum requirement mentioned earlier one access may not be enough for large homes especially ones with a center cathedral ceiling that becomes an obstacle separating the two sides of the attic.
Attics need to be able to breathe and should remain the same temperature as the outside air.
In contrast a house built using roof trusses will have an attic space full of angled web framing that connects the top chords analogous to rafters to the bottom chord which frames the ceiling beneath the attic space.
The house or room could have no attic but a vaulted ceiling with the underside of the roof and the collar beams visible.
It is a poignant moment that could only happen in a movie these days most houses do not have attics.
An attic framed with rafters will provide a fairly open space that can be used for storage or even converted to living space.
An older home might have very little insulation if any at all so you should have some added.
It might be cooler in very hot climates with adequate vents high up.
Even the air space above a flat roof needs to be vented.
It s very important to have an attic vented.