How to Make Storm Windows for a Screened Porch

Measure the length and width of the existing porch windows. It’s all right if the newly made storm windows are a bit smaller than the actual window sizes as long they’re sized proportionally.

Construct the storm window frames using 1-by-2-inch pieces of pine or oak, or purchase screen framing pieces at any local hardware store. Screen framing pieces snap together at the corners. Otherwise, a 1-by-2-inch piece will require mitering at the ends so the pieces can be glued and nailed together.

Tape plastic shrink wrap to the newly constructed frame using two-sided bonding tape. The thicker the plastic wrap, the better. Cut off any excess.

Create a seal or gasket material using long strips of polyethylene plastic. Fold the strips over to create a layering effect and place them along the back side of the frame. Staple the strips in place.

Place the newly made storm window onto the frame of the existing window. Brace the storm window in place using swing cleats. Use a drill and wood screws to attach a cleat at each corner of the window frame so that a tight fit exists between the storm window and the frame.