What to Know Before Specifying and Ordering Custom Windows
- Apr 6
- 2 min read
Updated: Apr 29
Custom windows offer flexibility, design freedom, and the ability to create a truly tailored look for your home. However, they also require thoughtful planning to avoid unexpected delays, added costs, or design limitations. Understanding the key factors before you specify and order can make a significant difference in the success of your project.

Understanding Lead Times
Custom windows often require longer production timelines, especially when multiple custom features are selected. If your project is on a tight schedule, it is important to confirm timelines early and plan accordingly so installation is not delayed.
Exploring Customization Options
There are many ways to tailor windows to your design. Options include custom sizes, exterior finishes, interior finishes, interior wood species, hardware styles, and simulated divided lites, commonly referred to as SDLs.
Simulated divided lites are a more modern term used in place of muntins, which historically divided glass into smaller panes. Today, manufacturers offer several ways to achieve this look, including SDLs and GBGs, which stands for grids between glass. Each option provides a slightly different aesthetic and level of authenticity, so it is worth understanding the differences when selecting your window style.

How Custom Choices Impact Cost
Each upgrade or customization can add to the overall investment. Specialty finishes, upgraded materials, unique hardware, and grid patterns all contribute to pricing. Understanding these costs upfront helps keep your project aligned with your budget.
Standard Sizes vs. Custom Sizing
Designing around standard sizes when possible is a smart strategy. Custom sizing can significantly increase both cost and lead time. Planning ahead with your builder or architect can help you achieve your design goals while staying efficient.
Performance and Glass Options
Custom windows also allow you to improve energy performance through glass selection. Homeowners can choose between 2-pane and 3-pane insulated glass options to achieve better U-value performance. Lower U-values indicate improved insulation, which can help increase energy efficiency and indoor comfort, especially in climates with extreme temperatures.
Planning Ahead for Better Results
Early coordination between your builder, designer, and supplier allows you to make informed decisions before orders are placed. This helps avoid unnecessary customization and keeps your project moving smoothly.
Knowing the Limitations of Custom Windows
Even custom windows have restrictions. Limitations may apply based on material, maximum size, and available finishes depending on the manufacturer. Not every combination is possible, and some design ideas may require adjustments.
Warranty Considerations to Keep in Mind
Some custom options, such as oversized units or specialty finishes, may impact warranty coverage. It is important to review these details before finalizing your order to avoid surprises later.
At Bolyard Lumber & Design, we help homeowners, designers, and builders navigate the custom window process with confidence. From selecting the right options to understanding timelines and limitations, our team provides the guidance needed to bring your vision to life.
Learn more about custom window solutions at BolyardLumber.com or visit one of our locations in Rochester Hills, Birmingham, or Ann Arbor to get started on your project.


