How To Measure Your Roof (Step By Step) | Voyager Exteriors
measuring roof materials for rooftop repairs
  • Roofing

How to Measure Your Roof (Step by Step)

Whether installing, renovating, or repairing a roof, it’s essential to measure it correctly. Accurate measurements are the key to getting a perfect fit for the materials you’ll be using.

Most people struggle to accurately measure their roofs and end up with too much or too little material. Such errors can lead to costly mistakes, which is why measuring it properly the first time is essential.

You can avoid costly mistakes using the right tools and understanding essential dimensions. Read on to discover how to measure a roof accurately.

Step-by-Step Guide: How To Measure a Roof

If you have the right tools and the necessary skills, you can take up the job of measuring your roof. You can incorporate the necessary steps into the process to ensure accuracy and understand the exact roof pitch for your house.

Here is a step-by-step guide on how to measure a roof:

1. Prepare the Tools

Prepare all the necessary materials that you will need for measuring your roof. They include a tape measure, a chalk line or string, and a ladder.

Ensure all your tools are in good working condition and suitable for your roof. You can also get safety gear such as helmets, gloves, and shoes.

2. Draw a Sketch

A sketch can help you visualize what needs to measure. It can also help you mark the measurements in the drawing.

Remember, the roofing materials you sketch for a flat roof will differ from a metal roof. It’s crucial to have a clear image of what to expect before starting any roofing job.

You can measure the eaves, gables, and hips of the roof. You can also add notes to your sketch or make a separate sketch of the roof for measuring each section.

3. Measure the Footprint of the House and Roof

man measures roof eave for material order
Soffits, Fascias and Eaves Installation. Contractor Install Soffits. Roofing Repair. Fascia and Soffit Repair.

You can use the tape measure to get the length and width of your house and roof. Start by measuring the eaves, the roof’s edge that overhangs your house’s walls. Measure from the end of the eaves to the other end.

Next, measure the width of your roof from one edge to another. Ensure you measure at least two points and take the average of these measurements.

4. Calculate the Area and Square Footage of the Roof

You can calculate your roof area and square footage by multiplying the length and width. Divide the result by two to get the area of each section of your roof.

You can then multiply the area by the number of sections to get the total square footage of your roof. It can help you to know how many shingles or materials you will need for your roof.

5. Convert the Square Footing to Roofing Squares

A single roofing square is equal to one hundred square feet of roof. You can use an online calculator to convert your numbers or calculate the number of squares by dividing your total square footage by one hundred.

It can give you precise measurements of your roof and the estimated material you will need for your roof.

6. Determine the Pitch of the Roof

You can use the ladder to determine the pitch of your roof. Start by placing a level on top of your ladder and measure from the eave of your roof to the peak. You can then divide this measurement by the length of your roof and multiply it by twelve.

homeowner measures roof pitch

It is essential to know the correct pitch as it can help you decide which type of material is suitable for your roof. Different pitches, such as low, medium, and steep slopes, have different requirements.

7. Add the Waste Factor

It is essential to consider that some materials might get wasted during the installation. You can add at least 10% of the total material required to factor in this waste. You can also estimate waste for fixing gutters, flashing, and other roof accessories.

8. Confirm the Measurements

Once you have calculated how much material is required for your roof, it is essential to confirm all your measurements. You can use different methods, such as measuring the distance from each edge to the peak and confirming that all measurements are correct.

9. Discuss Your Findings With a Professional

You can discuss your findings with a professional and get their opinion before making any decisions. Most roofing contractors can also help you decide on the material and accessories suitable for your roof.

Why You Should Measure Your Roof

Measuring your roof can be daunting as it includes a lot of calculations and measurements. However, it is essential to do this accurately as it can help you decide on suitable materials and accessories for your roof.

With correct measurements, you can avoid wasting money and materials on your roofing project. It can also help ensure your roof is installed correctly and will last many years.

Here are reasons why you should measure your roof:

  • You can calculate the amount of material you will need for your project.
  • It can help to ensure effective installation for your roofing projects.
  • It can help you to choose suitable materials and accessories for your roof.
  • You can save money, avoid wasting materials and reduce roof replacement.
  • You can also ensure your roof will last for many years.

With the right measurements and calculations, you can get an accurate estimate of the materials needed to ensure that your roofing project is successful.

Get Accurate Roof Measurements Today

installing roof soffit materials

Measuring your roof can be challenging, but it is an integral part of any roofing project. You can use tools such as a measuring tape, level, and ladder to measure your roof’s length, width, pitch, and total square footage.

Once you have these measurements, you can calculate the material and accessories you will need for your project. It is also important to discuss your findings with a professional roofing contractor so that they can ensure the accuracy of your measurements.

If you find difficulty doing the task after learning how to measure a roof, you should hire professional roofers to help. 

Contact us today to get started with your roofing project.


Roofing is an essential part of the environment as it helps protect you from elements such as harsh weather, wind, and rain. As such, numerous questions can arise regarding the measurement of a roof. Here are some FAQs answered:

When should I measure my roof?

It is best to measure your roof before starting any project or after completing a major repair or renovation. It can help you to decide on the right materials and accessories for your roof.

How do I measure a low-slope roof?

Measuring a low roof slope requires different methods than a steep-slope one. The pitch finder tool can calculate your roof’s total square footage. You can also use the rise-and-run method to measure a low-slope roof.

Can professional roofers offer roof estimates?

Yes, professional roofers can provide you with accurate estimates for your project. They are experts in their field and can help to ensure that all measurements are accurate.

Check Out Our Recent Blog Posts

get the knowledge you need to start your home's transformation

Mother and Son Playing

Transforming Twin Cities Homes

The Voyager family can’t wait to help yours!

Get In Touch
Share to...