One sash casement doors are used for the exterior of houses that require insulation from sound and heat.
Two sash casement doors are used for the exterior and balcony. There are many styles of two sash casement door: outward or inward opening, both sashes made of glass, glass upper...
Four sash casement doors are often used for large houses that require the maximum utilization of space.
Sparlee outward casement window can be made in any size, and designed to be suitable for all architectural styles from apartments to offices, hotels