How to Make Window Openings Smaller in a Brick Facade

Brick facades are timeless and classic architectural elements that add charm and character to any building. However, there may be instances where the size of the window openings in a brick facade doesn’t align with the desired aesthetic or functional requirements. However, with careful planning, proper tools, and expert guidance, this endeavor can be successfully accomplished while preserving the integrity and beauty of the brick facade.

Can a Window Be Made Smaller?

We understand that homeowners have various reasons for wanting to modify the size of their window openings. It could be for aesthetic purposes, to improve energy efficiency, or even to accommodate a different interior layout. Whatever the motivation, our window design experts assure you that it’s indeed possible to make window openings smaller or bigger.

When it comes to enlarging window openings, the process generally involves removing part of the wall to make way for a larger window. Our experienced team carefully assesses the structural implications of this modification to ensure the integrity of your home remains intact. It may be necessary to install additional support structures, such as headers or lintels, to redistribute the load and maintain stability.

We can install smaller windows within the existing openings or adapt the surrounding wall to reduce the size accordingly. This may involve resizing the window frame or altering the walls dimensions to ensure a seamless fit.

During the remodeling process, our team pays close attention to the architectural features and overall design of your home. We aim to create a cohesive and harmonious appearance, ensuring that the modified window openings integrate seamlessly with the rest of your property.

It’s important to note that any alterations to window openings require expertise and precision. Our professionals have the necessary knowledge and experience to handle such modifications safely and efficiently. We also take into consideration building codes and regulations to ensure compliance with local guidelines.

To further reduce the size of a window opening, the most effective method involves the installation of additional lumber or boards. For instance, if you wish to decrease the height by 1/2 inch, you can rip down a 1/2-inch strip of plywood and securely affix it on the sill. Similarly, incorporating a 1x board will effectively decrease the size by 3/4 inches.

Can You Make a Window Opening Smaller?

Another popular method is using foam insulation to fill in the window opening. Foam insulation comes in various forms, including spray foam and foam boards. These can be easily cut to the desired size and placed within the rough opening. Foam insulation not only reduces the size of the window opening but also provides added insulation and helps to minimize drafts.

In some cases, if the size reduction required is substantial, it may be necessary to remove the existing window frame and replace it with a smaller one. This can be a more labor-intensive and costly option, but it ensures a precise fit and a professional finish. It’s essential to consult with a professional contractor or window specialist to ensure the proper size and type of window frame are chosen for the replacement.

Alternatively, if aesthetic appearance is a concern, decorative trim can be added around the existing window frame to reduce it’s visual size. This method doesn’t physically reduce the openings size but creates an illusion of a smaller window. Decorative trim options include using wooden moldings, vinyl trims, or even faux finishes to achieve the desired look.

It’s important to note that when making a window opening smaller, proper measurement and precision are crucial. It’s advisable to seek guidance from a professional who can provide expert advice and ensure that all necessary steps are taken to maintain structural integrity and accommodate any specific building codes and regulations.

Regardless of the method chosen, it’s important to consider the impact on natural light and ventilation that reducing a window opening can have. It may be necessary to compensate for the reduced size by adding additional windows or incorporating artificial lighting solutions. Therefore, proper planning and consideration of these factors are essential when making a window opening smaller.

Once the foam has expanded, it can be trimmed and shaped to fit the contour of the window frame, creating a seamless and energy-efficient seal. Additionally, applying a layer of silicone sealant over the foam can further enhance it’s durability and water resistance. Overall, using expanding foam is an effective and efficient solution for filling gaps between brick and window, ensuring long-lasting protection and insulation.

How Do You Fill a Gap Between Brick and Window?

Once the foam has fully expanded and hardened, use a sharp utility knife to trim off any excess foam sticking out. This will ensure a clean and seamless finish between the brick and window. Additionally, it’s important to clean off any residual foam that may have gotten on the window or brick surface using a solvent or paint thinner. This will prevent any unwanted discoloration or damage to the surrounding areas. It’s worth noting that expanding foam may not be suitable for all types of gaps or situations. For smaller gaps, a more flexible and less rigid filler material such as caulk or silicone sealant may be more appropriate.

Source: Filling Gaps Around Window Frames – DIY Extra

Reducing the size of a window opening may call for more than just a mere adjustment. In cases where a reduction of over 3 inches is required, it’s advisable to frame in the opening and incorporate sheathing. To ensure a proper fit, it’s recommended to apply a bead of sealant or construction adhesive around the edges of any filler board before installing it into the opening. By following these steps, you can effectively modify the window opening to your desired dimensions.

How Do I Reduce the Size of a Window Opening?

Reducing the size of a window opening can be achieved through several steps. Firstly, if the required reduction is more than 3 inches, it’s advisable to frame in the opening and add sheathing. This ensures structural integrity and stability. By framing the new, smaller window opening, it allows for a proper fit and prevents any potential gaps and leaks.

Once the framing is completed, it’s important to meticulously seal the new window opening to guarantee a tight seal. Adding a bead of sealant or construction adhesive around the perimeter of any filler board can effectively prevent any air or moisture infiltration. This step is crucial in maintaining the energy efficiency and weather resistance of the window.

When installing the filler board into the opening, it’s recommended to use fasteners that will securely hold it in place. This additional reinforcement ensures the durability of the window opening and prevents any potential movement or shifting over time. By taking the necessary precautions during the installation process, one can avoid any future issues that may arise due to poor workmanship.

Another important factor to consider is the compatibility between the new window and the reduced opening. It’s essential to select a window that matches the dimensions and specifications of the modified opening. This ensures a proper fit and prevents any unnecessary adjustments or modifications.

Additionally, it’s important to note that reducing the size of a window opening may require the involvement of a professional. Misaligned or improperly installed window openings can lead to structural complications and compromise the safety of the building. Seeking the expertise of a qualified contractor or window specialist can ensure that the job is done accurately and efficiently.


In conclusion, the process of making window openings smaller in a brick facade involves a series of steps that require careful planning and execution. By assessing the structural integrity of the existing brickwork, determining the desired size and location of the new window openings, and following established industry techniques, it’s possible to successfully resize the windows and maintain the overall integrity and aesthetic appeal of the brick facade. Additionally, it’s crucial to consult with professionals, such as architects or contractors, to ensure compliance with building codes and regulations. Ultimately, with the appropriate knowledge and expertise, modifying window openings in a brick facade can be achieved effectively, enhancing the functionality and visual coherence of the building.

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