Custom windows – benefits and their practical application

During industry events, we frequently encounter investors and construction professionals who ask us the same question: “Can you create windows for non-standard openings?” This is especially common when working with historical buildings that weren’t constructed with today’s standardized dimensions in mind.

While standard window sizes serve many projects well, the growing demand for custom windows reflects both practical necessity and evolving design preferences. In this article, we will answer when custom windows may prove great, and to add one more reason, we will also touch on the tilt and turn custom windows that are taking the market by storm. 

What are standard window sizes?

Most frequently used sizes in OKNOPLAST projects

When working with OKNOPLAST Tilt and Turn products, customers frequently request certain dimensions that have become industry standards. These commonly used sizes include:

• 3′ x 4′ (36″ x 48″) – Ideal for smaller rooms and bathrooms
• 4′ x 6′ (48″ x 72″) – Perfect for bedrooms and living spaces
• 5′ x 6′ (60″ x 72″) – Common for larger living rooms and kitchens
• 6′ x 8′ (72″ x 96″) – Excellent for creating dramatic views in main living areas

These dimensions have become standard because they efficiently fit most modern construction specifications and provide balanced proportions that work well in contemporary homes.

You can see how standard sizes work perfectly in new construction in our New Jersey project video and our Chicago residential project.

Benefits of standard sizes

Choosing standard window sizes offers several practical advantages:

• Faster lead times – Standard windows can often be delivered and installed more quickly
• Cost efficiency – Manufacturing processes are optimized for these dimensions, typically resulting in more affordable pricing
• Ease of integration – Standard sizes are designed to work seamlessly with common wall framing dimensions
• Uniformity – Creates a cohesive look across the facade of your home
• Simplified installation – Contractors are familiar with standard dimensions, reducing installation time and potential complications

Standard windows are particularly well-suited for new construction projects where the wall openings can be designed around these dimensions, or for straightforward renovations where existing openings already conform to standard measurements.

Why go for custom Tilt and Turn windows?

While standard windows serve many projects well, there are specific situations where custom windows become not just preferable but necessary.

Historical buildings present one of the most common scenarios requiring custom windows. These structures were built before standardization became common in construction, resulting in uniquely sized openings that vary from room to room. Preserving these original openings maintains the building’s architectural integrity while allowing for modern window technology (like our thermal breaks and tilt and turn mechanism) to improve comfort and efficiency.

PIXEL Window OKNOPLAST

Statement architectural features also demand custom solutions. At OKNOPLAST, we’ve seen increasing demand for corner windows and sliding doors that create seamless indoor-outdoor transitions. These installations require precise sizing related to the building’s structural system – the dimensions must align perfectly with load-bearing elements while maximizing the glass area for the desired aesthetic effect.

For larger constructions, aluminum frames often become necessary due to their superior structural strength. Thanks to our advanced manufacturing technology, we can easily adapt aluminum window systems to the specific requirements of ambitious architectural projects.

Unusual shapes represent another area where customization becomes necessary. Triangular windows that follow rooflines, circular windows as architectural accents, or arched windows in traditional designs all require custom manufacturing. These distinctive elements add character to buildings that standard rectangular windows simply cannot achieve.

Custom material and finish options

Custom Tilt and Turn Windows offer much more than just flexibility in size and shape. At OKNOPLAST, we provide a wide range of aesthetic choices to ensure your windows align seamlessly with your overall design vision.

Color is often the first detail homeowners and investors notice. Our selection includes the full RAL color spectrum, giving you virtually unlimited options to match or contrast with your home’s exterior and interior.

For a truly distinctive look, consider our dual-tone designs, which feature different colors on the interior and exterior surfaces—perfect for achieving a cohesive appearance both inside and out. You can also opt for our full-wrap variant, where the window presents the same finish on the interior, exterior, and within the frame, creating a seamless, unified look from every angle.

Material resembling nature

For those seeking a more natural look, our woodgrain veneers offer the warmth and character of real wood, combined with the durability and low maintenance of modern materials.

If you’re aiming for a contemporary aesthetic, our brushed-metal finishes deliver a sophisticated, industrial-inspired appearance.

These finish options allow you to create a cohesive design language throughout your property by matching your windows to other elements such as:

• Garage doors
  

• Exterior siding
  

• Roofing elements
  

• Interior trim and moldings
  

• Cabinetry and built-ins

Function and performance of custom windows

There’s more to windows than just how they look—performance, thermal and sound efficiency, and ventilation capabilities all play an important role in the everyday comfort of your home.

The great news? With OKNOPLAST Tilt and Turn windows, you can customize many features to better suit your needs.

For example, standard double-glazed units work well in moderate climates, while triple-glazed systems offer superior insulation for extreme environments. In urban homes near busy streets, specialized acoustic glazing significantly reduces noise transmission, creating quieter, more peaceful interiors.

These performance differences are both measurable and meaningful—the right glazing can lower energy costs and enhance daily comfort. You’ll notice the difference when the utility bills arrive.

Focus on safety

For many homeowners, the need for enhanced home security is growing. That’s why key-lock handles have become a popular choice for ground-floor windows. Meanwhile, smart-enabled hardware lets you integrate your windows with home automation systems for remote monitoring and control. These practical features improve security without sacrificing convenience.

Custom security features also help address specific vulnerabilities.

• Multi-point locking systems secure the window at multiple points along the frame, making forced entry significantly more difficult.
• Reinforced frames and laminated glass add another layer of protection.

These elements are especially important for easily accessible windows or homes located in secluded areas.

Custom Tilt and Turn Windows – are they for you?

Custom windows become the logical choice when working with non-standard openings, historical buildings, or distinctive architectural designs. They allow you to maintain the integrity of existing structures while improving performance or to realize unique design visions without compromise. While they typically require a greater investment, the results—perfect fit, optimal performance, and distinctive appearance—often justify the additional cost.

Whether you choose standard or custom windows, working with an experienced manufacturer ensures you’ll receive quality products that serve your needs for decades to come. At OKNOPLAST, we’re ready to help you explore all possibilities and find the perfect window solution for your next project, whatever its requirements may be.