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

When it comes to choosing the right door hinge, you might be overwhelmed by the various options available in the market. However, if you're looking for a reliable and sturdy hinge, the 3 inch door hinge is the perfect choice for your door.
1. Strength and Stability: One of the main reasons to choose a 3 inch door hinge is its strength and stability. These hinges are designed to support the weight of heavy doors and ensure they swing smoothly without any sagging or misalignment.
2. Versatility: 3 inch door hinges can be used for both interior and exterior doors. Whether you have a wooden or metal door, these hinges are suitable for various materials, making them a versatile option.
3. Easy Installation and Adjustment: Installing a 3 inch door hinge is a straightforward process, and most come with pre-drilled holes for convenience. These hinges also allow for easy adjustment, ensuring your door is perfectly aligned and functions smoothly.
Before purchasing a 3 inch door hinge, there are a few factors you should consider:
1. Material: 3 inch door hinges are available in different materials such as stainless steel, brass, and zinc alloy. Each material offers its own benefits, so choose the one that suits your preferences and the overall aesthetics of your door.
2. Security: If security is a concern, opt for a 3 inch door hinge with security features such as non-removable pins or tamper-proof design. These additional features can provide an extra layer of protection for your door.
3. Finish: Consider the finish of the door hinge in relation to the overall style of your door. Whether you prefer a polished, brushed, or antique finish, make sure it complements the design of your door and enhances its visual appeal.
To ensure your 3 inch door hinge lasts for years to come, follow these maintenance tips:
1. Regular Cleaning: Clean your door hinges periodically to remove dust, dirt, and debris. Use a soft cloth or a mild detergent solution to clean the hinges gently.
2. Lubrication: Lubricate the moving parts of the hinge annually or as needed. Apply a small amount of lubricant to the pivot points to keep the hinge functioning smoothly.
3. Check for Loose Screws: Over time, screws may become loose due to frequent use. Inspect your hinges regularly and tighten any loose screws to maintain the stability of the hinge.
Investing in a high-quality 3 inch door hinge is a smart decision that can enhance the functionality and security of your door. With its strength, versatility, and easy installation, this hinge type is an excellent choice for any residential or commercial door.
Remember to consider factors such as material, security features, and finish when purchasing a 3 inch door hinge. Additionally, proper maintenance will ensure the longevity and smooth operation of your hinge.
Upgrade your door today with a 3 inch door hinge and experience the difference it can make!
3 inch door hingeWith 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.