Some facts regarding vinyl windows from the City of Newport, Kentucky’s Historic Preservation office:
- Vinyl is not a rigid material and will shrink and expand during the seasons. Vinyl expands more than twice that of wood. It expands seven times farther than glass with each degree of temperature. This can cause the seal between the vinyl framework and the glass to fail.
- Wood windows have survived for centuries. Vinyl windows have a 15 to 20 year lifespan.
- Insulated vinyl windows have desiccant filled spacers between the glass panes. The desiccant eventually absorbs all the moisture making the window appear cloudy.
- As much as 85% of air filtration (or heat loss) is around the edges of the sash, not through the glass.