A Beginner’s Guide to Window Trim

A Beginner’s Guide to Window TrimThe finishes of a home can have a dual purpose of improving its ambience and providing a level of functionality. Interior trim and coving have the unique ability to hide unfinished edges, bringing stylistic unity to a room or directing the eyes toward centrepieces of decor.

Windows can be works of art by themselves, but there will always be a transition from the window’s surface to the surrounding wall. Window trim or casing that matches the architectural style of the windows and the house, in general, can help you improve the aesthetic appeal of a home.

What Is Window Trim?

Window trim is a design element installed between the window and the walls, covering the gaps and joints. Window casing includes several types of trims, each serving a different purpose.

For example, the stool is the horizontal board that the window sits on when installed in the window opening, and window stool trim can be used for this part of the window. In contrast, the window return trim fills up the rest of the edges around the window.

Trim, Casing and Moulding

It may be challenging to distinguish between these terms, especially if you have no experience in the field. However, it can be helpful to know a few definitions before browsing for products for your property. As mentioned earlier, window trim covers every gap between the drywall and different elements, like doors and windows. Trim is thus merely a generic term for the wood, plaster or fibreglass decorative joint covers around the house.

Casing usually refers to the moulding that encases a window or door. It typically pairs best with older timber windows, but modern windows can have it too. Contractors may sometimes also use the terms casing, moulding and trim interchangeably, so it can be helpful to clarify what they’re actually referring to.

Unique Styles of Window Trim

Here are some of the most popular types of window trim and casing:


Modern homes with double-glazed windows work best with a sharp casing made with contemporary materials.


The Craftsman style is defined by simplicity, and window trim in this style will follow this principle. These trims have a simple profile and often emphasise the natural beauty of the wood with a simple stain or lacquer.


Rosettes often sit above doors and windows casing at the corners. They are typically broader than the casing and provide an elegant touch that works well with both traditional and modern window styles.

Finest Window Finishes and More

Consider ordering and installing custom windows if you want to renovate or build your house and need new windows. Custom windows have a distinct advantage over generic products, as they can be altered to best meet your needs.

Our team of window experts here at Valley Windows can help you choose the best type of trim and casing for your windows, and we are happy to work with homeowners and contractors to achieve the best results. Contact us today to find out more about how we can help you with your window needs.

Image Source: Ornamental