Interior Storm Window (ISW) Manufacture

There are two ISW designs, the Outie and the Innie:

Outie ISW design

Outie ISW

The Outie ISW is attached to the window casing or interior trim.

Innie ISW design

Innie ISW

The Innie ISW fits inside the window casing or the interior stop.

Edge and corner of Outie ISW design

Outie ISW Edge and Corner Detail

Weatherstripping is squeezed between the Outie ISW frame and the window casing, and between the ISW frame and the window sill. The ISW is attached with thumb screws and EZ-Lock threaded inserts.

Corner of Innie ISW design

Innie ISW Corner Detail

For the Innie ISW, the weatherstripping is squeezed between the ISW frame and the window stop, holding the ISW in place.

Innie ISWs are easy to make

Let's make an Innie ISW

Click on the image above to see how to make an Innie. It's easy and fun!

Outie ISWs are easy to make

Let's make an Outie ISW

Click on the image above to see how to make an Outie. It's also easy and fun!

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