The purpose of installing interior trim is to minimize heat transfer. Casings cover the sealer used to fill the gaps between the windows and the wall openings. They protect the sealant from damaging elements and keep unwanted drafts from entering.
There are many color options for window frames. Consider your house’s other hues when selecting exterior window frame colors. Think about your roof color, the permanence of brick or stone and your siding as they factor into the overall aesthetic appeal of your home.