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How To Measure and Install Blinds

Blinds are a vital aspect of any home, providing privacy, light control, and an aesthetic touch to your interior design. Whether you’re a DIY enthusiast or simply looking to save on professional installation costs, this comprehensive guide will walk you through the process of measuring and installing blinds for windows and doors. With step-by-step instructions and cost-saving tips, you can confidently embark on this home improvement project and achieve a polished look for your living spaces.

How to Measure for Blinds: Ensuring a Perfect Fit

The blinds we've installed on a window in the living room

Precise measurements are the foundation of a successful blind installation. Taking the time to measure your windows correctly is crucial for achieving a seamless fit and ensuring that your blinds function as intended. Accurate measurements enhance the aesthetics of your windows and play a significant role in controlling light and ensuring privacy.

Tools and Preparation

Before you begin measuring for blinds, gather the necessary tools to ensure accuracy. You’ll need a tape measure and a pencil to mark your measurements. Creating a clutter-free workspace by clearing the area and window frames will provide a smooth surface for measuring and prevent any interference during installation.

Inside Mount vs. Outside Mount for Blinds

Understanding the difference between inside and outside mount installations is essential for selecting the right option for your windows. Inside mount blinds are installed inside the window frame and provide a neater, more streamlined look. On the other hand, outside mount blinds are mounted on the wall or above the window frame and are suitable for windows with limited depth.

Taking accurate measurements for your blinds is a crucial step to ensure a perfect fit and optimal performance. Let’s walk through the process for both inside and outside mount blinds, providing personalized tips along the way:

Measure for Inside Mount Blinds

Step 1: Measure Window Width Begin by grabbing your trusty tape measure and measuring the width of your window at three different points: the top, middle, and bottom. Windows are not always perfectly even, so recording multiple measurements will account for any variations.

Personal Tip: When measuring, take a moment to appreciate the uniqueness of your windows. Sometimes, old houses have charming little irregularities that make them special. Embrace those quirks, and remember that each window has its own character!

Step 2: Determine the Narrowest Width After measuring the window width at three points, jot down the measurements and identify the narrowest width among them. This smallest measurement will be your reference point for ordering the right size blinds.

Personal Tip: I usually take a deep breath and double-check the measurements to avoid any errors. It’s always better to be thorough and ensure accurate numbers before making any decisions.

Step 3: Consider the Gap Now, let’s talk about the gap. To ensure smooth operation and prevent friction, consider leaving a small gap on each side between the blinds and the window frame. About 1/4 inch on each side is usually sufficient.

Personal Tip: It’s like giving your blinds a little breathing room. Just like how we need some space to move comfortably, blinds appreciate the same consideration!

Step 4: Measure Window Height Moving on to the height measurement, position your tape measure at the top inside edge of the window frame and extend it downwards to the window sill. Take measurements at three different spots along the window’s left, middle, and right sides.

Personal Tip: I find measuring the height a bit like taking a journey from top to bottom. It’s fascinating to think about how these measurements will ultimately determine the perfect length of the blinds to cover the window elegantly.

Step 5: Determine the Longest Height Among the three height measurements you’ve taken, identify the longest one. This longest height will be the reference point when selecting the appropriate length for your blinds.

Personal Tip: Sometimes, I take a moment to visualize how the blinds will gracefully cover the window, providing privacy and allowing just the right amount of sunlight to brighten the room.

Measure for Outside Mount Blinds

Step 1: Measure Window Width For outside mount blinds, start by measuring the width of your window as usual, but this time, add a little extra width to ensure effective light blocking when the blinds are closed. I usually add around 3 inches on each side for this purpose.

Personal Tip: Adding extra width is like ensuring your windows have their own cozy blanket when it’s time to rest. This extra coverage ensures a comfortable and dark sleeping environment, just like we all need for a good night’s sleep!

Step 2: Measure Window Height Measure the height of your window from the top to the bottom, just like you did for inside mount blinds. Ensure you have at least 2 inches of flat surface above the window frame for mounting the blinds securely.

Personal Tip: It’s a bit like giving the blinds a little extra space to stretch out and showcase their full beauty. They’ll stand tall and proud, ready to enhance your space in the most elegant way possible!

By taking these detailed and personalized steps, you’ll ensure accurate measurements for your blinds, creating a perfect fit that complements your windows and enhances the overall aesthetic of your home. Remember, the measuring process is not just about numbers; it’s a journey of understanding your windows and embracing their uniqueness. So, take your time, be precise, and enjoy the experience of measuring for blinds that will bring both beauty and functionality to your living spaces.

Common Mistakes to Avoid When Measuring for Blinds

One of the most common mistakes is relying on a single measurement. Windows can be deceivingly uneven, and taking just one measurement may lead to blinds that don’t fit correctly. Always measure the width and height at multiple points to account for any irregularities.

Forgetting to Account for Gaps

Failing to consider the necessary gap between the blinds and the window frame can result in blinds that don’t operate smoothly or may get stuck. Remember to leave about 1/4 inch of space on each side for proper functionality.

Miscalculating Mounting Depth

When opting for inside mount blinds, ensure that your window casing is deep enough to accommodate the mounting hardware and the blinds’ headrail. Overlooking this measurement may lead to blinds that don’t fit properly within the window frame.

Overlooking Clearances for Outside Mounts

For outside mount blinds, it’s crucial to have enough flat surfaces above the window frame for secure mounting. Check your specific window trim dimensions to ensure there are no obstacles hindering the blinds’ installation.

Personal Tip: Remember that a little extra attention to detail can go a long way. Taking your time and double-checking your measurements will save you from potential frustrations during the installation process.

Tips for Measuring Irregular Window Shapes and Sizes

Irregularly shaped windows can add character to your home, but measuring them can be tricky. Embrace the uniqueness of these windows and approach the measurement process with patience and curiosity.

Use Template Paper

For unusually shaped windows, consider using template paper. Place the paper over the window and carefully trace its contours. Transfer the template to a flat surface and take measurements from there.

Seek Professional Assistance

If you feel unsure about measuring irregular windows, don’t hesitate to seek professional assistance. Window treatment experts can provide valuable insights and ensure precise measurements for a perfect fit.

Custom Blinds

For particularly challenging windows, consider investing in custom-made blinds. Custom blinds are tailored to fit your specific window shape and size, ensuring a seamless and elegant look.

Personal Tip: Measuring irregular windows is like solving a delightful puzzle. Take your time to explore different approaches and find the perfect solution that brings out the best in your uniquely shaped windows.

By avoiding common measurement mistakes and applying these expert tips, you’ll achieve accurate measurements for your blinds, whether you’re dealing with standard windows or more irregular shapes. Remember, the measurement process is an opportunity to embrace the distinctiveness of your windows and create a tailored look that perfectly suits your home’s style and personality.

How to Pick Blinds: Materials, Styles, and Cost Considerations

Picking the right blinds for your windows

When it comes to selecting blinds for your windows, the choice of material plays a crucial role in determining the overall look, durability, and maintenance requirements of your window treatments. Here, we’ll discuss the pros and cons of various blind materials available in the market:

Vinyl Blinds

Vinyl blinds are an affordable option that fits well within a budget. They are easy to clean and maintain, making them an excellent choice for high-traffic areas or homes with pets and children. However, some may find the plastic-like appearance less appealing compared to other materials.

Faux Wood Blinds

Faux wood blinds offer the best of both worlds, mimicking the elegant look of real wood at a more budget-friendly price. They are resistant to moisture, making them suitable for humid environments such as bathrooms and kitchens. Their sturdy construction and easy-to-clean surface make them a popular choice for many homeowners.

Wood Blinds

For those seeking a luxurious and natural aesthetic, wood blinds are a timeless option. They add warmth and sophistication to any room, creating a classic and inviting atmosphere. However, real wood blinds can be more susceptible to warping in humid conditions, so it’s essential to consider the environment before choosing them.

Metal Blinds

Metal blinds, often made of aluminum, offer a sleek and modern appearance. They are lightweight and durable, making them a practical choice for larger windows. Metal blinds are also easy to clean, but they may not provide the same level of insulation and privacy as other materials.

Slat Size and Style Impact

The size of the slats can significantly influence the overall aesthetics of your blinds. Let’s explore the impact of different slat sizes (1 inch, 2 inches, and 2 1/2 inches) and various blind styles:

Slat Size

  • 1-inch slats: These slats create a sleek and minimalist look, ideal for smaller windows and spaces. They allow for a more unobstructed view when the blinds are open but may require more precise tilting to control light and privacy.
  • 2-inch slats: A popular choice for many homeowners, these slats strike a balance between elegance and practicality. They work well for medium-sized windows and offer easy light control and privacy adjustment.
  • 2 1/2-inch slats: These wider slats provide a more dramatic and statement-making effect. They are excellent for larger windows, giving your space a bold and contemporary look.

Blind Styles

  • Cellular Shades: Also known as honeycomb shades, these shades offer excellent insulation and sound absorption. They work well in modern spaces and provide a soft, diffused light when closed.
  • Roller Shades: Simple and functional, roller shades are easy to use and come in a variety of fabrics and patterns. They are well-suited for modern interiors and provide a clean, streamlined look.
  • Vertical Blinds: With vertical slats, these blinds are an ideal choice for sliding doors and wide windows. They offer excellent light control and are often used in more vintage-inspired spaces.
  • Horizontal/Venetian Blinds: Classic and versatile, horizontal blinds come with adjustable slats, allowing you to control light and privacy easily. They work well in any setting and are a popular choice for their functionality.

Corded vs. Cordless Blinds

Apart from the material and style, another crucial consideration when selecting blinds is whether to go for corded or cordless options:

Corded Blinds

Corded blinds are operated using cords that raise, lower, and tilt the slats. While they have been a traditional choice for many years, there are some safety concerns, especially in homes with young children or pets. It’s essential to ensure that cords are properly secured and out of reach.

Cordless Blinds

Cordless blinds offer a modern and child-safe alternative. They use a push-and-pull system or a bottom rail to adjust the blinds, eliminating the risk of entanglement and making them more user-friendly.

Cost Comparison and Savings

Finally, let’s delve into the cost aspect of selecting blinds and the potential savings associated with DIY installations:

  • DIY vs. Professional Installation: Opting for DIY blind installation can lead to significant cost savings compared to hiring professional installers. By following our step-by-step guide and ensuring accurate measurements, you can confidently install the blinds yourself.
  • Cost-Effective Material Selection: Consider your budget and desired aesthetic when choosing the blind material. Vinyl and faux wood blinds are generally more budget-friendly, while wood blinds may require a higher investment for their elegant appeal.
  • Long-Term Investment: Keep in mind that the initial investment in high-quality blinds can lead to long-term savings. Durable materials and efficient energy-saving features may reduce your energy bills over time.

How To Install Blinds on Windows

Installing blinds can be a rewarding and cost-effective DIY project that adds both functionality and style to your windows. With the right tools and a bit of patience, you can achieve a professional-looking installation without the need for expensive professional help. Here’s a step-by-step guide to help you through the process:

Preparing for Installation

Prepare the blinds to be installed on windows

Before embarking on your blind installation journey, taking some time to prepare and gather the necessary tools will set you up for a smooth and successful project. Here’s a detailed guide to help you get ready for the installation:

  1. Gather the Essential Tools: Make sure you have all the tools required for the installation. These include a cordless drill with appropriate drill bits, a measuring tape, a pencil, a level, a ladder or step stool (if needed), and a screwdriver. Having the right tools at hand will save you time and frustration during the installation process.
  2. Review the Blind’s Instructions: Before starting, carefully read through the blind’s installation instructions provided by the manufacturer. Each blind may have specific guidelines and unique features that you need to be aware of before proceeding. Understanding the instructions thoroughly will help you avoid common mistakes and ensure a successful installation.
  3. Measure and Mark: Double-check your measurements to ensure accuracy. Measure the windows where you plan to install the blinds, both for width and height, to confirm that the blinds you purchased are the correct size. Mark the positions for brackets using a pencil and level to ensure they are aligned and straight.
  4. Create a Safe Workspace: Clear the area around the windows to create a safe and clutter-free workspace. Remove any furniture or objects that might hinder your movement during the installation process. This step is crucial for your safety and to prevent any accidental damage to your property.
  5. Use a Spirit Level: To avoid crooked blinds, use a spirit level when installing the brackets. The level will help you determine if the blinds are aligned correctly, providing a level and professional-looking result.
  6. Organize the Blinds and Hardware: Organize the blinds and their respective hardware for each window. Group the brackets, screws, and other parts together, making it easier to find what you need for each installation. Labeling or separating the blinds for different rooms can also help streamline the process.
  7. Check for Compatibility: Ensure that the blinds you purchased are compatible with the type of window you have. Some blinds are specifically designed for certain window styles or sizes. Confirm that the blinds can be installed either as an inside mount or an outside mount based on your window’s configuration.
  8. Safety First: If you’re using a ladder or step stool during installation, prioritize safety. Ensure the ladder is stable and on a flat surface. If you have someone to assist you, consider having them hold the ladder steady as you work.
  9. Prepare for Potential Challenges: Anticipate any potential challenges you might encounter during the installation. If you have windows with unique shapes or uneven surfaces, think about how you will adapt the installation process to accommodate these variations.

Taking the time to prepare adequately before beginning the installation will help you approach the project with confidence and ensure a successful outcome. By having all the necessary tools and materials ready, reviewing the instructions, and creating a safe workspace, you’ll be ready to tackle the next steps of the blind installation adventure with ease.

Step-by-Step Installation Guide

Now that you have prepared the tools and read the blind’s instructions, it’s time to dive into the exciting part: installing your blinds like a DIY pro! Follow this step-by-step guide for a seamless installation process:

  1. Drill Pilot Holes for Brackets: Using a cordless drill with the appropriate drill bit, carefully drill pilot holes at the marked positions for the brackets. Pilot holes ensure that the screws go in smoothly and prevent the window frame from splitting. Take your time to make these holes accurately.
  2. Secure the Brackets in Place: With the pilot holes ready, attach the brackets to the window frame using the screws provided with the blinds. Use a screwdriver to tighten the screws, ensuring that the brackets are firmly and securely attached. For wider windows, you might need to install an additional center bracket for extra support.
  3. Slide the Top of the Blind into the Brackets: Now comes the satisfying part! Lift the blind and align the top rail with the installed brackets. Slide the top of the blind into the brackets until you hear a reassuring click, indicating that it’s securely in place. Check that the blind hangs evenly and level by using a spirit level.
  4. Secure the Blind in Place: After sliding the blind into the brackets, make sure it’s firmly held in position. Double-check that the brackets are securely fastened to prevent any mishaps later on. Gently tug on the blind to confirm it’s stable and won’t come off easily.
  5. Optional: Attach the Valance: If your blinds come with a valance, it’s time to give your window treatment a polished finish. Attach the valance to the top rail of the blind as per the manufacturer’s instructions. The valance adds a decorative touch and conceals the brackets, enhancing the overall aesthetic appeal of the blinds.
  6. Test the Blind’s Functionality: Before you admire your handiwork, give the blind a test run. Raise and lower the blind to ensure smooth and effortless operation. Check the tilt mechanism (if applicable) to ensure that it rotates and adjusts the slats as intended. This step helps you catch any potential issues early on.
  7. Admire Your Newly Installed Blinds: Congratulations! You’ve successfully installed your blinds, and now it’s time to appreciate the transformation they bring to your windows and living spaces. Stand back and take a moment to enjoy the beauty and functionality of your new window treatments.

Tips for Efficient Blind Installation

  • If you’re installing blinds on multiple windows, consider tackling one room at a time to stay organized and focused.
  • Enlist the help of a friend or family member to make the installation process smoother and quicker.
  • If you encounter any challenges during installation, don’t hesitate to refer back to the instructions or seek assistance from the blind manufacturer.
  • Keep all the leftover hardware and instructions in a safe place, as you may need them for future adjustments or repairs.

Troubleshooting Common Challenges

  • Uneven Blinds: If your blinds appear uneven, ensure that the brackets are aligned correctly and that the blind is seated properly in the brackets. Adjust as necessary to achieve a balanced appearance.
  • Sticky Operation: If the blind seems to be difficult to raise or lower, check for any obstructions or misalignments in the rail system. Lubricate the moving parts if needed.
  • Misaligned Slats: If the slats don’t tilt smoothly, verify that the tilt mechanism is properly engaged. Make adjustments as required to ensure smooth slat movement.

Remember, installing blinds is a rewarding DIY adventure that not only enhances your home’s aesthetics but also provides essential light control and privacy. By following this comprehensive guide and our helpful tips, you’ll master the art of blind installation and enjoy the beauty and functionality of your new window treatments for years to come.


Embarking on a DIY blind installation adventure is not only a practical way to enhance your living spaces but also a rewarding home improvement project that allows you to put your skills to the test. By measuring for blinds with precision and carefully selecting the right materials and styles, you’ll create a cohesive and stylish look for your windows while maintaining your privacy and controlling light levels.

So, what are you waiting for? Roll up your sleeves, gather your tools, and embark on this DIY adventure! Let your home reflect your unique style and taste with beautiful, cost-effective blinds that perfectly complement your décor.

Now, go forth and install those blinds with confidence! The results will speak for themselves, and you’ll take immense pride in your accomplishment as you bask in the beauty of your newly transformed living spaces. Happy DIY-ing!

Last Updated on July 21, 2023

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