Depending on the material, maintenance, and climate, most windows last anywhere from 15 to 30 years. Vinyl windows have the shortest lifespan, wood and fibreglass the longest. But if your windows are older than 15 years old it is time to start paying attention. Watch for signs of leaks, rot, decay, warping, or damage. You should only have to replace windows once, maybe twice in your life.

Hardwoods like mahogany and walnut are best for the aesthetic appeal and longevity of the window. However, softwoods like cedar and pine grow faster and are more sustainable choices.

If you want to change the paint on your windows, you should use an oil-based primer and paint to make them more water-resistant and protect them from rot. Since they will be facing harsh weather at some point, it is best to use high-quality paint and apply at least two coats on each sash. You shouldn't paint the inside part of the sash where it touches the window.

• Dust them somewhat regularly and clean them with water afterward, but do not let water pool or soak the wood. 
• If you see evidence of cracks or peeling in the paint, repair them soon after. 
• Clean the glass during this process as well. 
• Once a few years, treat the wood or repaint using protective outdoor paint.