Vinyl and wood are both good materials. They both insulate well, but vinyl is a better choice for a high performance window. Many wood windows are just standard sizes and then the opening is made to fit the window. Our vinyl windows are custom made for a superior fit and seal within the existing opening. Vinyl will also not rot or swell when subject to the elements. Our windows are available with three different wood grain interiors – they look just like wood, without the maintenance. No more sanding, painting or staining ever again!