Getting the right measurements for your window project is a vital first step. Accuracy is key for a perfect fit, whether you plan a full replacement or just new blinds. Knowing how to measure windows correctly saves you from costly mistakes and frustration. This guide will show you the key steps for different projects.
What Tools Will You Need?
Before you begin, gather a few basic tools. Having these items ready will make the process much easier and more accurate.
- A steel tape measure
- A notepad
- A pencil or pen
The Golden Rule: Measure Three Times
Window frames are not always perfectly even, especially in older homes. To get the most accurate numbers, you need to measure each window three times for both width and height.
How to Measure Windows for Replacement
With this, you will be finding the size of the rough opening. However, it helps to understand the process.
Step 1: Measure the Width
To find the width, measure between the vertical sides of the window frame, called the side jambs.
- First, measure the distance from jamb to jamb at the top.
- Next, take the same measurement across the middle.
- Finally, measure the distance at the bottom.
Step 2: Measure the Height
Now you can find the height. You will measure from the top of the frame, called the head jamb, down to the bottom sill.
- First, measure the height on the far left side.
- Next, take the same measurement down the middle.
- Finally, measure the height on the far right side.
Step 3: Check if the Window is Square
This step is very important. To see how do you measure a window to check if it’s square, you take two diagonal measurements.
- Measure from the top-left corner down to the bottom-right corner.
- Then, measure from the top-right corner down to the bottom-left corner.
If these two numbers differ by more than a quarter of an inch, the frame is considered “out of square.” A standard window may not fit correctly, but this is a common issue that can be easily addressed during a window replacement.
How to Measure for New Window Blinds
Measuring for blinds depends on where you plan to hang them.
Inside-Mount Blinds
For a clean look, an inside mount is a great choice. Follow the “measure three times” rule.
- Width: Measure the width at the top, middle, and bottom. Record the smallest number.
- Height: Measure the height on the left, in the middle, and on the right. Record the longest number, since you can usually shorten blinds.
Outside-Mount Blinds
Use an outside mount when the window frame is not deep enough.
- Width: Measure the full area you want to cover, from the outer edge of the trim on one side to the other. Add 1 to 1.5 inches to each side for better light control.
- Height: Measure from the top of the window trim down to the bottom of the sill. Add 1 to 2 inches for extra coverage.
When to Call a Professional
This guide is great for getting a budget estimate or for simple DIY projects. However, ordering custom windows requires perfect measurements.
- Small Errors are Costly: When ordering custom products, a tiny mistake can lead to an expensive problem.
- Professionals Guarantee Accuracy: An expert measurement is accurate for perfect installation. It ensures your new windows will fit perfectly.
- Peace of Mind: Deciding between a DIY project and a professional installation often comes down to accuracy. Calling a professional removes the stress and risk from the measuring process.
Conclusion
So, how to measure windows? Always remember to measure in three places and use the smallest number. Even if you can measure for many projects, calling a professional can give you a perfect fit. They can even work on custom projects, including new doors.
