Certifications & Test Reports
Over 50 USA & EU fenestration certifications and test reports.

When it comes to window selection, homeowners often consider various factors such as aesthetics, energy efficiency, and functionality. One popular choice that ticks all these boxes is side by side casement windows. These windows not only add a touch of elegance to any home but also offer numerous benefits in terms of ventilation, natural light, and energy savings.
1. Enhanced Aesthetics:
Side by side casement windows provide a sleek and modern look to your home. Their clean lines and unobstructed views allow for maximum natural light while adding a stylish touch to both the interior and exterior of the property.
2. Excellent Ventilation:
These windows are designed to open outward from the sides, creating an unobstructed opening for fresh air to flow into your home. The side by side configuration allows for maximum ventilation, making it ideal for rooms that require increased airflow, such as kitchens or bathrooms.
3. Energy Efficiency:
Side by side casement windows are known for their excellent energy efficiency. When properly installed and sealed, these windows offer a tight seal against drafts, minimizing air leakage and reducing heat transfer. They can contribute to lower energy bills by keeping your home cool in the summer and warm in the winter.
4. Increased Security:
These windows feature hook-shaped locks that are embedded within the window frame, making them highly secure and difficult to tamper with. When fully closed and locked, side by side casement windows provide an added layer of security for your home.
Side by side casement windows come with a range of features and customization options, allowing homeowners to tailor them to their specific needs:
Professional installation ensures the optimal performance and longevity of your side by side casement windows. Here are some maintenance tips to keep them in excellent condition:
Side by side casement windows are an excellent choice for homeowners seeking a combination of aesthetics, functionality, and energy efficiency. With their sleek design and customizable options, these windows not only enhance the overall look of your home but also provide excellent ventilation and security. Don't hesitate to consider side by side casement windows for your next window replacement or installation project!
side by side casement windowsWith Doorwin, you can have all of this with a simple move. This is because we believe that the best way to achieve your goals is by working with
our customers to find solutions to their problems.Our team of designers and engineers are dedicated to solving these problems by creating
products that are designed to be easy to install, easy to maintain and repair, while being cost-effective.
Over 50 USA & EU fenestration certifications and test reports.
TPS glazing ensures that no air leakage and fogging issues for 25 years warranty.
More than 4000 high-end bespoke fenestration projects in North America.
Doorwin products meanwhile with half price compared with your local dealers.
Our team of experts will work with you to develop a bespoke plan that fits your needs. We take a holistic approach to the planning process, combining our technical expertise with our knowledge of customer requirements and project constraints.
Doorwin is the manufacturer of full custom fenestration systems, and we're here for you. We provide you with the freedom to design your windows, doors, and more with no additional charge for special shapes, hardware styles, and color choices. Your vision is our inspiration; our job is to make it a reality.
Our products are made to pass your local inspector's verification and are built under USA building codes so you can rest assured that they are safe and sturdy. Choose Doorwin to experience the best bespoke fenestration service available today!
We take care of the entire process for you, from beginning to end. We have our own expertise and will provide free-charge design development & contract documentation with CAD and BIM drawings. In addition to elevation details and installation design, we will double-check that the products match the drawings and project specifications through video or pictures. We'll help you specify the delivery schedule and logistics service whilst keeping costs to a minimum.
We're proud to be one of the top exporters of windows and doors to the United States. We pack each window individually and in four layers, and finally into wooden boxes with non-fumigation, and at the same time, there will be a lot of shockproof measures in the container to protect your items. We ensure that your products will arrive at the sites in good condition after long-distance transportation.
Doorwin has been exporting tens of millions of dollars of windows and doors to the U.S. every year, and we know that improper packaging can cause breakage of the product when it arrives on site. What the client concerns, we concern most.
Doorwin experts are experienced in working with architects, builders and homeowners to ensre your vision becomes a reality.Welcome to visit a showroom, ask questions about product pricing, request a quote and more.
We are tested by the following standards:
-NFRC (North American Fenestration Rating Council)
-AAMA (American Architectural Manufacturers Association)
-WNMA (Wood National Monument Association)
-CSA101 (Canadian Standards Association)
-I.S.2 (International Standard ISO/IEC 17025)
-A440-11 (Standard for Fire Testing of Door Assemblies for Charging Rooms)
Doorwin is a company that specializes in custom-made doors and windows. We understand that every home is unique, and we are committed to providing you with the highest quality products possible.Our products are inspired by different lifestyles, and we respect your vision when designing them. Our designs are made specifically for you, so there is no additional cost. We work across styles and profiles, whether you're remodeling an old house or designing your new dream home. Find inspirations here and we will fulfill all your imaginations.