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Certifications & Test Reports
Over 50 USA & EU fenestration certifications and test reports.
The 4 over 4 window design is a timeless architectural feature that adds both elegance and functionality to any home. This style of window has been used for centuries, and its popularity has only grown over time. In this blog post, we will explore the origins of 4 over 4 windows, their unique characteristics, and the various benefits they offer homeowners.
The concept of 4 over 4 windows can be traced back to the Georgian era, which spanned from the early 18th to early 19th century. Georgian architecture, characterized by symmetrical and proportioned designs, heavily inspired the development of these windows. The term "4 over 4" refers to the number of panes in each sash: four panes in the top sash and four panes in the bottom sash.
One of the main reasons for the popularity of 4 over 4 windows is their ability to let in ample natural light while maintaining privacy. The large individual panes allow for maximum sunlight penetration, creating a bright and welcoming interior. Additionally, the symmetrically divided sashes create an aesthetically pleasing look that complements various architectural styles.
Due to the larger individual panes, 4 over 4 windows provide an abundance of natural light throughout the day. This not only enhances the overall atmosphere of the room but also reduces the need for artificial lighting during daylight hours, leading to energy savings.
The ability to open both the top and bottom sashes of 4 over 4 windows allows for excellent ventilation and airflow. In warm climates, this can help reduce the reliance on air conditioning by promoting natural ventilation, ultimately decreasing energy consumption.
4 over 4 windows are versatile enough to suit a wide range of architectural styles, including Colonial, Georgian, and Victorian. Their timeless design adds a touch of elegance to any home, making them a popular choice among homeowners and architects alike.
Investing in 4 over 4 windows can significantly enhance the value of your property. These windows not only improve the visual appeal of your home but also offer functionality and energy efficiency, which are highly sought after by potential buyers.
4 over 4 windows are an architectural marvel that combines aesthetics and practicality. Their timeless design, ability to maximize natural light, and suitability for various architectural styles make them a popular choice among homeowners. Consider installing 4 over 4 windows in your home to enhance its beauty and create a comfortable living environment.
4 over 4 windowsDoorwin provides one-stop solution for professional windows doors manufacturer and installation. We have been serving customers with our high quality and branded products in United States, Asia and worldwide.
With 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.
