How to Measure for Outside Mount Blinds: A Comprehensive Guide
Choosing the right blinds can transform a room, adding style, privacy, and light control. When deciding on blinds, you have two main mounting options: inside mount and outside mount. This guide focuses on **outside mount blinds**, where the blinds are installed outside the window frame, covering the entire opening and often extending beyond it. Outside mount blinds can create the illusion of a larger window, hide unattractive window frames, and provide better light blockage. However, accurate measurements are crucial for a perfect fit and optimal performance. This comprehensive guide provides step-by-step instructions on how to measure for outside mount blinds, ensuring you get the right size and enjoy the full benefits of your window treatments.
## Why Choose Outside Mount Blinds?
Before diving into the measurement process, let’s quickly recap the advantages of outside mount blinds:
* **Complete Coverage:** Outside mount blinds effectively block light and provide privacy by covering the entire window opening.
* **Hides Imperfections:** They can conceal damaged or unattractive window frames.
* **Makes Windows Appear Larger:** Extending the blinds beyond the window frame creates the illusion of a larger window.
* **Better Light Control:** With minimal gaps around the edges, they offer superior light control compared to inside mount blinds.
* **Versatility:** Suitable for windows without sufficient depth for an inside mount.
## Tools You’ll Need
Gathering the necessary tools beforehand will streamline the measuring process. Here’s what you’ll need:
* **Steel Measuring Tape:** Avoid using cloth or flexible measuring tapes, as they can stretch and provide inaccurate readings. A steel tape measure offers the most precise measurements.
* **Pencil:** For marking down measurements on paper. Erasable pencils are preferred to avoid permanent marks if you need to correct something.
* **Paper or Notebook:** To record all your measurements clearly. It’s helpful to dedicate a page to each window you’re measuring.
* **Ladder or Step Stool (if needed):** For reaching high windows safely. Always prioritize safety when working at heights. Make sure your ladder is stable and on a level surface.
* **Level:** To ensure the headrail is mounted straight. This is especially important if your window frame or wall isn’t perfectly level.
## Understanding Key Terms
Before we start measuring, let’s define the key terms we’ll be using:
* **Width:** The horizontal measurement across the window opening.
* **Height (or Length):** The vertical measurement from the top to the bottom of where you want the blinds to extend.
* **Overlap:** The amount the blinds extend beyond the window frame on each side and at the top and bottom. This overlap is crucial for light blockage and privacy.
* **Headrail:** The top part of the blinds that houses the operating mechanisms. The size and design of the headrail can influence the overall look of the blinds.
## Step-by-Step Guide to Measuring for Outside Mount Blinds
Follow these detailed steps to ensure you get accurate measurements for your outside mount blinds:
**Step 1: Determine Your Desired Overlap**
The overlap is the key to successful outside mount blinds. It prevents light gaps and ensures privacy. Consider these factors when deciding on your overlap:
* **Light Control Needs:** If you require near-total darkness (e.g., for a bedroom), a larger overlap is essential.
* **Privacy Requirements:** A larger overlap provides more privacy, especially in rooms facing busy streets.
* **Aesthetics:** The overlap contributes to the overall look of the blinds. A larger overlap can create a more substantial and impressive appearance.
**General Recommendations for Overlap:**
* **Width:** Add 3-4 inches to the width of the window opening. This means adding 1.5-2 inches on each side. For maximum light blockage, consider adding even more, up to 6 inches total (3 inches per side).
* **Height:** Add at least 3-4 inches to the height of the window opening. Adding more height at the top is generally recommended as it allows the blinds to stack neatly above the window when fully raised. You can adjust the bottom overlap based on your preference and whether you want the blinds to reach the windowsill or extend further.
**Example:**
Let’s say your window opening measures 36 inches wide and 48 inches high.
* **Width:** 36 inches (window width) + 4 inches (overlap) = 40 inches (final width)
* **Height:** 48 inches (window height) + 4 inches (overlap) = 52 inches (final height)
**Important Considerations for Overlap:**
* **Obstructions:** Check for any obstructions around the window, such as trim, molding, or pipes. You may need to adjust your overlap to avoid these obstructions.
* **Adjacent Walls:** If the window is close to an adjacent wall, ensure the blinds won’t bump into the wall when lowered. Adjust the overlap accordingly.
* **Window Sill:** Decide if you want the blinds to reach the windowsill or extend below it. If you want them to reach the sill, measure to the sill. If you want them to extend below, add the desired length to your height measurement.
**Step 2: Measure the Width**
Using your steel measuring tape, measure the width of the window opening. Measure at the top, middle, and bottom of the window opening. This is important because window openings are not always perfectly square. Record the **largest** of these three measurements. This ensures that the blinds will completely cover the widest part of the window.
**Example:**
* Top width: 36 inches
* Middle width: 36 1/4 inches
* Bottom width: 36 inches
In this case, you would use 36 1/4 inches as your window width measurement.
**Step 3: Add the Overlap to the Width Measurement**
As determined in Step 1, add your desired overlap to the width measurement. Remember, a minimum of 3-4 inches total overlap is recommended (1.5-2 inches per side).
**Example (Continuing from the previous example):**
* Window width (largest measurement): 36 1/4 inches
* Desired overlap: 4 inches
* Final width: 36 1/4 inches + 4 inches = 40 1/4 inches
This 40 1/4 inches is the width you will provide to the blind manufacturer or retailer.
**Step 4: Measure the Height**
Measure the height of the window opening. Measure from the top of the window opening to the bottom. Again, measure in three places: the left side, the middle, and the right side. Record the **largest** of these three measurements. This ensures the blinds are long enough to cover the tallest part of the window opening.
**Example:**
* Left height: 48 inches
* Middle height: 48 1/2 inches
* Right height: 48 1/4 inches
In this case, you would use 48 1/2 inches as your window height measurement.
**Step 5: Add the Overlap to the Height Measurement**
Add your desired overlap to the height measurement. Remember, a minimum of 3-4 inches total overlap is recommended, typically split between the top and bottom. It’s generally preferred to add more overlap at the top to allow the blinds to stack neatly when raised.
**Example (Continuing from the previous example):**
* Window height (largest measurement): 48 1/2 inches
* Desired overlap: 4 inches
* Final height: 48 1/2 inches + 4 inches = 52 1/2 inches
This 52 1/2 inches is the height you will provide to the blind manufacturer or retailer.
**Step 6: Double-Check Your Measurements**
Accuracy is paramount. Before placing your order, double-check all your measurements. It’s a good idea to have someone else verify your measurements as well. Small errors can lead to improperly fitting blinds, resulting in frustration and potentially costly mistakes.
**Step 7: Consider the Headrail Size**
Different blind styles have different headrail sizes. The headrail is the top part of the blind that houses the operating mechanism. While the manufacturer will account for the headrail size when fabricating your blinds, it’s good to be aware of it, especially if you have limited space above the window. Ask the blind manufacturer or retailer about the headrail dimensions for the specific blind style you’re considering. This can be important for ensuring proper clearance if you have a header or other architectural detail above the window.
**Step 8: Provide Accurate Measurements to the Manufacturer**
When placing your order, be clear about whether you’re providing the **exact** size you want the blinds to be, or if the manufacturer needs to make any adjustments. Most reputable blind companies will ask for clarification to ensure accuracy. Specify that you are ordering outside mount blinds and provide the final width and height measurements, including the overlap. Don’t assume the manufacturer will automatically add the overlap; explicitly state that the measurements you’re providing INCLUDE the desired overlap.
## Special Considerations
* **Multiple Windows:** If you’re measuring for multiple windows in the same room, measure each window individually. Window openings can vary slightly in size, even if they appear identical.
* **Corner Windows:** Measuring for blinds in corner windows requires extra care. Consider how the blinds will meet at the corner and ensure there’s sufficient clearance for operation. Consult with a professional for guidance on corner window installations.
* **Arched or Specialty Windows:** Measuring for arched or other specialty-shaped windows can be complex. It’s often best to seek professional assistance for accurate measurements and installation.
* **Uneven Walls or Window Frames:** If your walls or window frames are noticeably uneven, you may need to adjust your measurements and consider using shims during installation to ensure the blinds hang straight.
* **Existing Window Treatments:** If you plan to install outside mount blinds over existing window treatments (e.g., curtains), measure the width and height of the existing treatments to ensure the new blinds will adequately cover them.
## Troubleshooting Common Issues
* **My Window Isn’t Square:** As mentioned earlier, window openings are not always perfectly square. That’s why it’s essential to measure in multiple places and use the largest measurement. You may also need to use shims during installation to compensate for any unevenness.
* **I’m Unsure About the Overlap:** If you’re unsure about the appropriate overlap, start with the recommended minimum of 3-4 inches total. You can always increase the overlap later if needed. Consider the room’s lighting needs and privacy requirements when making your decision.
* **I Made a Mistake in My Measurements:** Contact the blind manufacturer or retailer immediately if you realize you’ve made a mistake in your measurements. They may be able to adjust your order before it’s processed. However, once the blinds have been fabricated, it’s usually difficult or impossible to make changes.
## Professional Installation vs. DIY
While measuring for outside mount blinds can be a DIY project, installation can be more challenging, especially for large or heavy blinds. Consider the following factors when deciding whether to install the blinds yourself or hire a professional:
* **Your DIY Skills:** Are you comfortable using power tools and working at heights? Do you have experience with similar home improvement projects?
* **The Size and Weight of the Blinds:** Large or heavy blinds can be difficult to handle and install properly. Professional installers have the necessary equipment and expertise to ensure a secure and level installation.
* **The Complexity of the Installation:** If you have unusual window shapes or challenging mounting surfaces, professional installation may be the best option.
* **Your Time and Patience:** Installing blinds can be time-consuming, especially if you’re not experienced. If you’re short on time or patience, hiring a professional can save you a lot of hassle.
## Conclusion
Measuring for outside mount blinds doesn’t have to be daunting. By following these detailed steps and paying attention to the special considerations outlined above, you can ensure you get the perfect fit for your windows. Accurate measurements are the foundation for a successful blind installation, leading to enhanced light control, privacy, and aesthetics in your home. Remember to double-check your measurements, consider the headrail size, and communicate clearly with the blind manufacturer or retailer. With a little preparation and attention to detail, you can enjoy the beauty and functionality of perfectly fitted outside mount blinds for years to come.