Storm Windows | How To Measure and Install Storm Windows

How To Install Storm Windows

Storm windows are one of the best ways to lower your heating bills in the winter!   Yet so many of us either don’t have them, or don’t check them to make sure they are working properly.

Storm windows are installed over your regular windows and they trap an insulating layer of air between the two layers of glass.

Properly installed storm windows can keep you toasty warm by not allowing that cold air to come under the windows or even through the thin glass of regular windows. Ordinary window glass has really, no insulation, and you would be floored to know just how much heat escapes through them.

Know about your storm windows

The casing around your windows is called the “window frame” and the window sill is called the “horizontal edge”. 

Pick out your storm windows

There are quite a few different types of storm windows to choose from:

  • Vinyl or aluminum storm windows with single pane glass –  Commonly found on the interior side of the window
  • Thicker single pane glass with a wood frame – Most commonly found on the exterior side of the window.
  • Single pane triple track aluminum storm windows – This type can slide open, also includes a removable screen. These are installed over double hung windows.

Measure your windows

Width:  Measure the top, middle and bottom inside edge of the casing

Height: Measure the left, middle and right hand side of the casing

These measurements will be used to purchase your storm windows.  You must measure every window in your home and not assume the measurements are the same just because they look alike.

Wash your windows

Thoroughly wash both the storm windows that you have purchased and your regular windows. 

Caulk around the windows

Outside: Apply a thin layer on the inside edge of the window casing, along the sides and across the top (do not caulk around the bottom).  Make sure you spread your caulk evenly

Insert the Storm Windows

Insert your storm windows into the opening and tightly against the window sill.  Leave about 1/8 inch gap at the top of the storm window to allow the window to expand with the temperature.  Make sure position the window straight

Fasten the Storm Windows

Start at the top of the window and fasten using 1 inch, #4 sheet metal screws. Be careful not to drill the screws in too tightly or the frame may warp

Check the Extender

You will need to check that the extender is touching the bottom edge of the window sill. If it isn’t, continue to move it down slowly until it is flush.  Screw at an angle into the side of the window sill.  This helps to hold the lip of the extender in place

Check your windows

You now need to check your regular windows to make sure they still funtion (you can raise and lower them).  If not, you will need to realign the storm windows until it is straight

Installing storm windows can help save up to 50% on your heating costs – so to say they are a good investment would be understating the facts!

For more tips, please visit the Home Improvement section of our website!

Do you have any tips for Installing Storm Windows?

Join In The Conversation

Hey, we love to hear from our site visitors, hint-hint... That's You!
Join in and share your comments, we are a gravatar friendly site also!