How To Insulate Window And Door Frames

3 November 2015
 Categories: Home & Garden, Blog


One of the easiest ways to improve the thermal efficiency of your home is to add insulated windows. However, a full-scale window replacement can be too inconvenient and expensive for many customers. There are more affordable ways to insulate your window fixtures. One cost-effective project is adding insulation to the hollow casing around the frame. This is a nice project because you can do it by yourself and you can still live in your home while the work is taking place. This article explains how to add insulation to window and door frames.  

Using Spray Foam

To do this job, you will need to use spray foam. This is easiest to work with and does not create a big mess. You will need to spray the foam directly into the hollow area behind the casing through holes that you will have to drill. First, buy the foam insulation. It comes in pressurized cans with convenient nozzles for easy spraying. The holes you drill should just be slightly bigger than the nozzle diameter. Most nozzles are less than 1/2" so it is easy to find a drill bit in your toolbox that is big enough for the nozzle. For further assistance, contact a local outlet, such as Steve's Urethane Inc.

Where to Drill the Holes

You will only need to drill 2 holes along each piece of casing. So, on the vertical pieces you will drill one hole at the top and another on the bottom. Spray the foam into the top hole first. Keep spraying until the foam starts to come out of the bottom hole. You will not need to spray into the bottom hole unless the foam never reaches it. There could be a stud in the wall that blocks the foam from falling all the way down. If this is the case, you will just spray until the foam starts to overflow out of that hole.

On horizontal molding, you will do the same technique, but from side to side.Wait until the foam is completely dry before you patch the hole. Using wood putty is the quickest and easiest way to cover the holes. Also, you might have problems painting the small patch to match the rest of the casing. It might be easier to just paint the entire casing. It is a great opportunity to repaint and redefine the style of your window and door casing. You can have more energy efficient and modern windows with this simple remodel. 


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