During the summer and most of fall we keep 2 windows open for cross ventilation.
Old attic windows opening.
6 windows in all.
An oval window wooden.
And if necessary i d keep them open just a crack until you can get some roof vents in place or gable vents.
We have a large full attic.
Thoughtful young woman looking at camera from the window of an attic at sunset.
Blur background of the city and buildings.
When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still.
If so you should keep the windows open both winter and summer.
A broken window glass of the attic room of a house with the red shingles roof.
2 are ornamental and the other 4 are regular functioning windows.
If you leave the attic windows open be sure and staple some screens over them maybe even hardware cloth would be better to keep the critters out bats and raccoons etc will invade your space and give you fits.
The windows have screens.
It gets stifling and stale up there if we don t.
I cant think of a single reason tho close it all summer unless theres a big storm.
We do get bugs flies in the summer ladybugs in the fall.
Attic glass open window in an old wooden house with meander ornament.