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How to Measure Roof For Shingles (Homeowner’s Guide)

Posted By: Matt Watson

The health of your roof is hugely important when it comes to protecting your home’s structure. One of the key aspects of roof maintenance and replacement is accurately measuring it for shingles. Whether you’re considering a DIY project or seeking professional assistance, knowing how to measure your roof properly is essential.

In this guide, we’ll delve into:

  • The signs indicating the need for a shingle roof replacement
  • The importance of accurate measurements
  • The process of measuring your roof
  • Estimating shingle quantities
  • Costs involved
  • Why entrusting this task to a professional contractor might be the wisest choice.

If you’ve been searching “how to measure roof for shingles,” you’ve found exactly the place you need to be!

Signs You Need to Replace Your Shingle Roof

Before diving into the nitty-gritty of measuring your roof for shingles, it’s important to recognize the signs that indicate your roof may need replacement. These signs include:

  • Age: Asphalt shingle roofs typically last between 20 to 30 years. If your roof is nearing the end of its lifespan, it’s wise to start planning for a replacement.
  • Curling or Buckling Shingles: Shingles that are curling, buckling, or losing granules are nearing the end of their life and may no longer provide adequate protection.
  • Missing Shingles: Missing shingles leave your roof vulnerable to leaks and water damage.
  • Water Stains on Ceilings: Water stains on your ceilings could indicate roof leaks, which may require immediate attention.
  • Sagging Roof Deck: A sagging roof deck could signify structural issues, often caused by water damage or deteriorating roof materials.

Can You DIY a Shingle Roof Replacement?

While DIY projects can be rewarding, replacing a shingle roof is a complex and labor-intensive task that requires specialized knowledge and skills. Factors such as:

  • Safety concerns
  • Proper installation techniques
  • Adherence to building codes

Makes DIY roof replacement challenging for the average homeowner.

Additionally, mistakes made during installation can result in costly repairs down the line. Therefore, unless you have prior experience and are confident in your abilities, it’s advisable to leave shingle roof replacement to the professionals.

Why Proper Measurements Are Important

Accurate measurements are the foundation of a successful roof replacement project. Without precise measurements, you risk ordering insufficient or excess materials, leading to delays, waste, and increased costs. Proper measurements also ensure that the new shingles are installed correctly, providing optimal protection and longevity for your roof.

How to Measure Your Roof: 5 Steps

measuring a roof

Measuring your roof may seem daunting at first, but with the right tools and approach, it can be accomplished methodically. Here’s a step-by-step guide to measuring your roof for shingles:

1) Safety First:

Before climbing onto your roof, prioritize safety by using appropriate personal protective equipment (PPE) and ensuring stable ladder placement.

2) Determine Roof Pitch:

The pitch of your roof will influence the type of shingles you need and the amount of material required. Use a pitch gauge or online resources to determine the pitch of your roof accurately.

3) Calculate Roof Area:

Break down your roof into manageable sections, such as rectangles and triangles, and measure the length and width of each section. Multiply the length by the width to calculate the area of each section, then add the areas together to determine the total roof area.

4) Account for Overhangs:

Measure the overhangs of your roof and subtract them from the total area to obtain the net roof area.

5) Consider Waste Factor:

To accommodate waste and cut shingles, add a waste factor (typically 10%) to your net roof area when estimating shingle quantities.

How Many Shingles to Order

Once you’ve calculated the total roof area and factored in waste, you can determine how many shingles to order. Most shingle manufacturers provide guidelines for estimating shingle quantities based on roof area and shingle type. Additionally, consider purchasing extra shingles to account for any unforeseen circumstances or repairs that may arise during installation.

The Cost of Shingle Roof Replacement

The cost of shingle roof replacement varies depending on factors such as the size and pitch of your roof, the quality of roofing materials used, and labor costs in your area. On average, homeowners can expect to pay anywhere from $5,000 to $12,000 for a standard replacement of roof shingles. It’s essential to obtain multiple quotes from reputable contractors and carefully review the scope of work and materials included in each estimate.

Why We Recommend Leaving It to a Professional Roofing Contractor

While DIY enthusiasts may be tempted to tackle a shingle roof replacement themselves, there are compelling reasons to enlist the services of a professional contractor:


Professional contractors have the knowledge, skills, and experience to execute roof replacement projects efficiently and effectively.


Roofing can be hazardous work, especially for those without proper training and equipment. Professional contractors prioritize safety and adhere to industry best practices to minimize risks.

Warranty Coverage:

Many roofing manufacturers offer warranties that may only be valid if the shingles are installed by a certified contractor. Hiring a professional ensures that your roof is installed according to manufacturer specifications, preserving warranty coverage.

Time and Convenience:

Roof replacement is a time-consuming process that can disrupt your daily routine. Professional contractors have the resources and manpower to complete the job promptly, minimizing inconvenience for you and your family.

Need to Measure a Roof? Let Us Help!

roofer taking measurements

Measuring your roof for shingles and total square footage is a critical step in the roof replacement process, requiring attention to detail and precision. By understanding the signs indicating the need for a shingle roof replacement, the importance of accurate measurements, and the benefits of hiring a professional contractor, you can make informed decisions to safeguard your home’s integrity and longevity.

Don’t leave your roof length or roof slope up to chance! Instead, hire the pros at Springfield Roofing to make sure your roof replacement goes smoothly.

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