No Case Trimless Door Options

Modern Design Trend: Trimless Interior Doors

In the architectural world of contemporary home design, the concept of “trimless doors” or “no trim door jambs” is gaining significant traction. These innovative door openings, also known as caseless jambs, remove traditional trim and casing around the door opening. And in its place, offer a sleek and minimalist aesthetic that seamlessly integrates with modern interiors.

As the demand for clean lines and minimalist design continues to rise, interior trimless doors present an appealing solution for architects, designers, and homeowners alike. Treely™ Doors recognizes the growing preference for modern aesthetics, and we’re proud to offer a range of options to meet this demand, providing customizable solutions for those seeking to enhance their interior spaces.


What is a door jamb?

A door jamb is the vertical frame surrounding a door, consisting of two upright pieces (called the door jambs) and a horizontal piece (called the header). It provides structural support for the door and helps secure it in place within the wall.

Standard jamb thickness is 3/4″ and includes an applied stop. To learn more about standard Treely™ selections, check out this article:

Learn more about Jambs, Stop and Hinges.

Casing refers to the trim or molding that surrounds a door or window, covering the joint between the wall and the door jamb or window frame. It serves both decorative and functional purposes, providing a finished look and concealing any gaps or imperfections between the wall and the door or window frame.

How do you make it trim-less?

Trimless doors or “caseless jamb”, as the name suggests, lacks the traditional casing or trim that surrounds a door or window. Instead, the drywall finishes directly alongside the jamb, creating a clean and minimalist look without the added decorative molding.

This setup can pose challenges during installation and finishing, as it requires precise alignment of the drywall with the jamb edge to achieve a seamless transition. Treely™ offers various options for no trim door jambs, but successful installation depends on coordination among architects, contractors, and installers to ensure a successful and seamless installation.


The “Clean Edge” Jamb

The first option, the Clean Edge jamb, presents a departure from traditional door jamb designs by aligning the width of the jamb precisely with the dimensions of the underlying stud wall. This innovative approach ensures a sleek, minimalist appearance that complements modern architectural aesthetics.

Installed prior to sheetrock, the Clean Edge jamb calls for the drywall to overlap the edge of the jamb. To achieve a seamless finish, corner beads are applied to the drywall edge meeting the jamb. The jamb is then poly wrapped and protected throughout the drywall and taping stages.

2d drawing of modern trimless jamb "Clean Edge"

The “Recess Edge” Jamb

The Recess Edge jamb presents a distinctive wood design where the 1 ¼” thick jamb extends 3/4″ beyond the plane of the wall on both sides, providing an added layer of detail. This extension encases the door while allowing it to be recessed from the jambs’ edge, aligning the door’s face flush with the plane of the wall.

When sheetrock is installed, it is butted up against the back side of the jamb. To allow for post-drywall installation, a small 1/2” x 1/2″ applied molding is affixed to the rear side of the jamb.

2d drawing of modern trimless jamb "Recess Edge"

A conventional butt hinge is compatible with the Recess Edge jamb. A 3/8″ x 3/4″ rectangular notch is milled into the jamb’s edge to accommodate the hinge’s operation. To maintain symmetry on the non-hinge side, the applied stop molding is made to the exact width that creates a uniform 3/8″ x 3/4″ reveal. This meticulous detail enhances the simplistic and straight-line approach to modern design.

Modern jamb "Recessed Edge" showing the strike side
Modern jamb "Recessed Edge" showing the hinge side

The “Solid Edge” Jamb

The Solid Edge jamb is a thickened wood jamb available in various thicknesses typically ranging from 1 1/4″ to 2″. Like the Recess Edge jamb, it extends beyond the wall plane, offering a substantial appearance. However, unlike Recess Edge , the Solid Edge jamb does not include notches in the jamb edge which would allow for conventional butt hinges to be used. Instead, concealed hinges or raised barrel hinges are necessary for installation.

The backside of the Solid Edge jamb features square notches cut to accommodate for sheetrock insertion. These notches are intentionally milled wider than the actual sheetrock thickness, allowing for slight adjustments during installation. A caulking bead seals the gap between the jamb and sheetrock for a paintable finish. It’s important to note that this door and jamb configuration must be installed prior to sheetrock installation.

2d drawing of modern trimless jamb "Solid Edge"

Trimless Doors

While meticulous planning is undoubtedly essential in any construction project, it’s often the lack of communication between the multiple parties involved that leads to challenges during installation of a “no-case” door design. Designers invest significant time and effort in crafting the perfect vision, yet without understanding from the contractor and installer perspective, crucial practical considerations may be overlooked. This disconnect can result in increased costs and delays, as design choices clash with on-site realities.

However, understanding that each stakeholder brings valuable insights to the table can help mitigate these challenges. Treely™ is always here to help in any discussions that take place during the planning stages, if any type of customization is needed we will certainly be open to accommodating new designs that may help the process.


The caseless door jamb presents a modern and streamlined alternative to traditional casing, fitting seamlessly into contemporary architectural designs. At Treely™ we offer a range of options to suit various preferences and project requirements, from sleek and minimalist Sleek Edge jamb to substantial and robust Solid Edge jamb.

Additionally, our team is ready to accommodate custom designs to meet your unique vision. If you’re ready to elevate your space with our innovative door jamb solutions, contact us today to discuss your project needs and explore the possibilities.

Feel free to reach out anytime.