If your gaps are even larger you may wish to consider using expanding foam.
Gaps between window frames and walls inside.
For large exterior gaps mainly ones wider than one centimetre you may be better off using mortar.
Caulk seals the gaps between the window trim and the siding on your house.
Caulking windows to give them a finished look inside and out and seal out leaks and drafts is a fairly common diy task.
Seams where the window trim meets the walls.
Gaps can appear around any type of window frame on a house of any age.
On your home s exterior caulking windows is needed in the same places.
Such stopgap measures eliminate air leaks by sealing sash perimeters from indoors.
In either case gaps around a window frame are not good and can lead to damp penetrating the internal walls window frames and beyond.
If the insulation is fiberglass this can be dangerous as the fibers can be inhaled causing lung.
Come spring add or replace weatherstripping for a longer lasting fix.
Mind the window gaps if you can feel a breeze around your closed windows consider these quick and easy ways to block drafts.
When you re looking to fill in the gaps around your window frames you will probably find that there are several different options available.
But if done incorrectly it can lend a sloppy amateurish look.