Many people don't realize that windows are separate fixtures that are installed after a home is framed. As a result, there is often a gap between the wall studs and the fixture frame. This small gap is then covered with molding. However, if this gap is not properly insulated, it could be reducing the energy efficiency of your window fixtures. Do you ever walk by a closed window and notice a cold burst of air? If so, this could be your problem. This article explains how you can increase the insulation of existing window fixtures by using premixed spray foam insulation cans to spray in between the stud and frame.
Removing the Molding
First you need to remove the decorative molding that is covering the gap on your window fixtures. This is easy with a couple of flathead screwdrivers, a utility knife and a small hammer. First, cut through the caulk line to break the seal. Then, knock the screwdrivers behind the molding so you can pry it away. This should create minimal damage to the molding, so you can reattach the same piece when you are done. That being said, you could always use this as an opportunity to change your window style and install a different molding when the job is done.
Spraying the Insulation
The spray foam insulation that comes in pressurized cans is perfect for jobs of this size. These are easy to use and they even come with a small hose so you can reach deep into the gap. Place the nozzle and the very back of the gap and start to spray until it fills it up to the front edge of the stud. It is usually better to start at the bottom of the gap and work your way up and around the window. Each spray will only take a matter of seconds, so the job goes by quickly. After the foam is fully dry you will need to scrape it flat with a putty knife. This way you can attach the molding back onto the window flush.
Once all of the gaps are filled with foam, you can reattach the molding. This will require the use a nail gun. Depending on their design and style, you can repeat this process for your door fixtures as well. This simple upgrade will increase the thermal and sound insulation of your window fixtures. It is a cheap and easy DIY project.