Gaps are typically caused by different expansion and contraction rates of different types of materials at different temperatures.
Gaps in window frames.
Laurence closed cell backer rod available from amazon and then run your bead.
Wanda i mean it sounds like a big gap.
And it is filled with insulation.
Backer rod and caulking compound is the way to go.
Flexible over time frames and walls can slightly shift contact and expand.
Prep the caulking gun cut the seal at the.
Typically the space around a window is going to be more like a to a inch and then it s shimmed because this allows the house to sort of move around the window so to speak.
Actually i ve filled gaps that wide with nothing but silicone caulking.
Clean area to be sealed to ensure proper adhesion remove any old caulk and paint.
Excellent adhesion window sealant adheres to wooden pvc polycarbonate and metal window frames.
Such stopgap measures eliminate air leaks by sealing sash perimeters from indoors.
Make sure the area is free from dust.
The frame of the window may be vinyl or wood which expands at different rates than the wood wall framing and the brick exterior wall surfaces depending on the temperature or humidity of any particular day.
I predict that you ll be sorry if you use expanding foam.
Come spring add or replace weatherstripping for a longer lasting fix.
If you have gaps wider than 1 4 the best practice is to fill them first with a foam backer rod such as this c r.
If the holes in the window frame are in the actual wood frame you can also use wood filler which works much in the same way that mortar does to fill in a crack.
How to guide check for air leaks light a candle around the windows and exterior doors that you think have air leaks.
My main reasons for choosing frame sealant above other options to fill in the gaps around your windows are.