Avoiding A Draft When Installing A Window

by Claude Walters

If you do not install your window properly, there is a risk that you will experience an air leak. New windows or replacement windows need to fit perfectly into the space that the window was designed for or else there will be gaps through which air can flow and change the temperature of your home. 

Assemble Your Tools

Before you begin installing the window, it is important to make sure that you have all of the tools for the installation project so you do not have to travel back and forth. This includes a hammer, caulk gun, level, stapler, tape measure and utility knife.


In order to avoid air leaks, it is important to prepare the window sill before installing the window. The house wrap is cut and you must immediately tuck the bottom flap of the house. Then, you can install the sill flashing. Be careful with the house wrap if you have never installed a window before because it is easy to miss the actual opening. Instead, feel around for the window opening and mark cuts before cutting. 

Obtaining Flashing

Your window may come with sill flashing. If it doesn't, you will need to purchase your own aftermarket sill flashing. Nail the corners under the house wrap at the sides and over the house wrap. Then, a center section needs to be cut to fit. With the raised ribs, cut the middle section to allow it to overlap the corners. 


Seal the house wrap and seal around the window in order to avoid having gaps through which air can escape. Flashing tape must go over  the flanges in order to be the first part of the window that protects your home from drafts. Use a utility knife to cut the tape to the proper length. 


When you are replacing an old window with a new one, you will want to use a window that uses the same system as the original one that was installed and that ideally has the size of the original. This will make the installation process much easier and will make it less likely that you will have a draft. 

You can save some money by installing your window yourself. However, if you are concerned about whether there will be air leaks, which can lead to higher utility bills and a draft, it is important that you hire a professional window installation company. For more information, contact a service like Four Seasons Home Products.