This story shows you how to make a new metal screen sash
Metal storm and screen windows are frequent troublemakers, partly because they are often of poor quality and may have been hastily installed. You can sometimes -- but not always -- purchase replacement parts; manufacturers are often regional and may be out of business. For a tighter seal consider installing better-quality storms.
1 or 2 hours to make most repairs
Hammer, tape measure, hacksaw and miter box, spline roller
General carpentry skills
Remove and inspect storm sashes. Contact manufacturers for parts as needed.
Screening and glass as needed, exterior wood glue or polyurethane glue, dowels, finish nails