Brick mould is a specialized trim that plays a crucial role in both the aesthetics and performance of exterior windows and doors. Essentially, it works by creating a finished, weatherproof seal and a decorative border around the exterior of a window or door frame, bridging the gap between the frame and the exterior wall.
What is Brick Mould?
Brick mould is a decorative trim that surrounds the exterior of a window frame. It typically extends slightly beyond the window frame, creating a finished, attractive look. While its name suggests an exclusive use with brick exteriors, brick mould is widely used with various siding materials, including vinyl, stucco, and fiber cement. It provides a clean, architectural finish that enhances a building's curb appeal.
Historically, brick mould was often integrated into the design of windows to help them transition smoothly into brick openings. Today, it remains a standard feature on many windows, serving both practical and aesthetic functions.
The Dual Function of Brick Mould
The effectiveness of brick mould lies in its ability to perform two primary functions simultaneously:
Aesthetic Enhancement
- Creates a Finished Look: Brick mould frames the window or door, giving it a polished and intentional appearance. Without it, the junction between the window frame and the exterior wall could look unfinished or abrupt.
- Adds Architectural Detail: It adds depth and character to the building's facade, contributing to its overall architectural style. Different profiles and widths of brick mould can be chosen to match or complement the home's design.
- Conceals Gaps: By extending slightly beyond the window frame, it effectively conceals any minor imperfections or gaps at the rough opening, ensuring a seamless transition.
Essential Weather Protection
- Sealing the Opening: Perhaps its most critical function, brick mould acts as a barrier, sealing the perimeter of the window or door against the elements. It prevents water, air, and insects from infiltrating the building envelope.
- Directing Water Away: The angled or sloped profile of many brick mould designs helps to shed water away from the window frame and off the building, preventing moisture from pooling and causing damage.
- Improving Energy Efficiency: By sealing air leaks, brick mould contributes to the overall energy efficiency of a home, reducing drafts and helping to maintain stable indoor temperatures.
How Brick Mould is Installed
The installation process of brick mould is critical for it to work effectively. It can be either pre-attached to a new window unit or installed as a separate trim piece.
Integration and Attachment Methods
- Integrated with Window: Many modern windows come with brick mould already attached to the frame, simplifying installation. The entire unit is then installed into the rough opening.
- Separate Trim Application: For some windows or renovations, brick mould is applied after the window is set. It is cut to size, mitered at the corners, and fastened directly to the window frame or the exterior sheathing around the opening.
Key Steps in Installation
Proper installation ensures the brick mould performs its sealing and decorative duties effectively. While details can vary, the general steps include:
- Preparation: Ensure the window opening is clean, square, and plumb. Apply appropriate flashing tape around the rough opening for an initial weather barrier.
- Window Installation: Install the window unit into the rough opening, ensuring it is level and plumb. Secure it according to the manufacturer's instructions.
- Attaching Brick Mould (if separate):
- Cut the brick mould pieces to size, typically with 45-degree miter cuts at the corners for a tight, professional joint.
- Align the brick mould around the window frame, ensuring it extends evenly beyond the frame edge.
- Fasten the brick mould securely to the window frame or directly into the wall framing using appropriate exterior-grade nails or screws. Spacing fasteners properly prevents bowing or movement.
- Sealing and Flashing: Apply exterior-grade caulk or sealant between the back edge of the brick mould and the exterior wall material. This creates a critical, watertight seal. Additional flashing might be installed over the top of the brick mould (head flashing) to further protect against water penetration.
- Finishing: Once installed and sealed, the brick mould can be painted or stained to match the desired exterior aesthetic.
Materials and Popular Styles
Brick mould is available in a variety of materials, each offering distinct advantages:
Common Materials for Brick Mould
| Material | Characteristics |
|---|---|
| PVC/Vinyl | Low maintenance, moisture/rot resistant, durable, often pre-finished. |
| Wood | Classic look, can be painted/stained, requires regular maintenance. |
| Composite | Blends wood fibers and plastic, durable, resistant to rot/pests. |
| Fiber Cement | Highly durable, fire-resistant, stable, takes paint well. |
Profile Variations
While the basic function remains the same, brick mould comes in numerous profiles and sizes. These variations allow for different aesthetic effects, from simple and contemporary to more elaborate and traditional designs.
Benefits of Utilizing Brick Mould
Incorporating brick mould into window and door installations offers several significant advantages:
- Enhanced Curb Appeal: Provides a refined and complete look to a home's exterior.
- Superior Weatherproofing: Forms a crucial barrier against rain, snow, and wind, protecting the building structure.
- Improved Energy Efficiency: Helps to seal air leaks, reducing heating and cooling costs.
- Streamlined Finishing: Simplifies the transition between the window frame and the exterior cladding, often reducing the need for extensive trim work.
- Durability and Longevity: When properly installed and maintained, it contributes to the overall longevity of the window unit and the surrounding wall.
By serving as both a functional weather barrier and an architectural embellishment, brick mould is an integral component in creating durable, attractive, and energy-efficient building exteriors.
