When it comes to home construction and roofing, understanding the size of your roof is essential. Whether you’re planning a roofing project, thinking about installing solar panels, or simply curious about your home’s dimensions, knowing how big your roof is can be quite useful. In this blog post, we’ll explore how to determine the size of a roof on a 1600 square-foot house.

Understanding Roof Size

Before we dive into the specifics, let’s clarify what we mean by the “size” of a roof. Roof size typically refers to the total square footage of the surface area that needs to be covered. This is the area exposed to the elements and where shingles, tiles, or other roofing materials are installed.

Measuring the Roof Size

Measuring the size of a roof can be straightforward if your house has a simple, single-pitched roof. However, if your home has multiple roof sections, dormers, or complex architectural features, you may need to break the measurements down by section.

Here’s a step-by-step guide to measuring your roof:

1. Determine the Roof’s Shape

Start by identifying the basic shape of your roof. The most common roof shapes include gable, hip, and shed. Your house may have a combination of these shapes.

2. Measure the Length and Width

Measure the length and width of each roof section. For gable roofs, measure the length and width of the rectangular section. For hip roofs, measure the length and width of each triangular section.

3. Calculate the Area of Each Section

To find the area of each roof section, multiply the length by the width. For triangular sections, use the formula for the area of a triangle: (1/2) x base x height.

4. Add Up the Areas

Sum up the areas of all sections to get the total square footage of your roof.

5. Consider Overhangs

Don’t forget to include any overhangs or eaves in your measurements, as these are part of the roof’s total size.

Example Calculation

Let’s say you have a 1600 square-foot house with a gable roof. Here’s how you might calculate your roof’s size:

  • The length of the house is 40 feet, and the width is 40 feet, resulting in a rectangular roof.
  • The area of the roof is 40 feet x 40 feet = 1600 square feet.
  • If your house has any overhangs, add their square footage to the total.


In this example, the roof on your 1600 square-foot house would be approximately 1600 square feet in size. Keep in mind that roof size can vary depending on architectural features, so it’s always a good idea to double-check your measurements and consult with a professional if you’re planning a roofing project.


As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. In the roofing industry, practical experience is a very crucial fact that can help you a lot. Hence, I want to help you with my blog.

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