It depends upon what other type of ventilation the attic has if any.
Leave attic windows open in winter.
It can do both.
If there are other ventilation sources such as eave and ridge vents then the window vents would be for summer use to disipate.
It allows air movement and will naturally exhaust the hot attic air.
We have a large full attic.
Recirculating old stale interior air can cause a host of symptoms.
I leave the windows wide open upstairs all day and only shut my girls bedroom window at night now as it s freezing.
We leave ours open all the time but still alot of condensation on our window.
And the extra heat is not just a summer concern come winter hot attic air can melt snow on the roof during the day only to refreeze when temperatures drop overnight creating ice dams that lead.
I ve also got a little dehumidifier on the window sil which works quite well.
My only suggestion is to have 2 awnings made to fit over and.
2 are ornamental and the other 4 are regular functioning windows.
Shutting the vents in your attic during the winter isn t going to help you hang on to too much heat where you actually want it in the living areas of your home.
One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home.
Insulation at least r 38 or more is there for heating and.
Leaving the windows open is a good idea as long as you are home.
We do get bugs flies in the summer ladybugs in the fall.
Best ventilation is open soffit venting to a open vented ridge vent.
Ridge vent must me installed per the manufactures instructions.
Open your windows in winter for the good of your family s health.
Instead it will merely cause a build up of moisture and heat that can cause other more troubling conditions in your home come spring.
The windows have screens.