During the summer and most of fall we keep 2 windows open for cross ventilation.
Old attic windows opening.
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 attic needs to be as close to the outside temp as you can get it year round.
We have a large full attic.
An oval window wooden.
6 windows in all.
If so you should keep the windows open both winter and summer.
We do get bugs flies in the summer ladybugs in the fall.
Thoughtful young woman looking at camera from the window of an attic at sunset.
You should open the window in late spring and close it in early fall.
2 are ornamental and the other 4 are regular functioning windows.
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.
It will vent heat out morning noon and night.
Blur background of the city and buildings.
A broken window glass of the attic room of a house with the red shingles roof.
I cant think of a single reason tho close it all summer unless theres a big storm.
Attic glass open window in an old wooden house with meander ornament.