To estimate the tarp size for your roof. Simply enter the roof's base length, width, and desired overlap, and the calculator will provide the total tarp area required to ensure complete and secure coverage.

What is roof trap?

A Roof Tarp is a protective covering, usually made from waterproof material, used to temporarily shield a roof from weather damage, leaks, or debris. It is often used after storms, during roof repairs, or to prevent water infiltration until permanent fixes are made.

Step-by-Step Process to Find Tarp Area:

Step 1: Calculate Roof Area (A)

The roof area is typically calculated by multiplying the length by the width of the roof base. For a simple rectangular or square roof:

$\text{Roof Area (A)}=\text{Length (L)}\times \text{Width (W)}$

Step 2: Calculate Roof Perimeter (P)

The perimeter of the roof is the total length around the base of the roof, calculated as:

$\text{Perimeter}=2\times (\text{Length}+\text{Width})$

Step 3: Calculate Tarp Area

Now, to account for the extra overhang (to secure the tarp around the edges of the roof), we use the formula:

$\text{Tarp Area}=\text{Roof Area}+(\text{Overlap Length}\times \text{Perimeter})$

Example Calculation:

Let’s assume:

• Roof Base Length (L) = 40 feet.
• Roof Base Width (W) = 30 feet.
• Overlap Length = 2 feet (for securing the tarp).

Step 1: Calculate Roof Area (A)

$\text{Roof Area (A)}=\text{40}\times \text{30}$

$\text{Roof Area (A)} =\text{ 1200}$square feet

Step 2: Calculate Roof Perimeter (P)

$\text{Perimeter (P)}=2\times (\text{40}+\text{30})$

$\text{Perimeter (P) }=\text{ 140 feet}$

Step 3: Calculate Tarp Area

Now, using the formula for Tarp Area:

$\text{Tarp Area}=\text{1200}+(\text{2}\times \text{140})$

$\text{Tarp Area }=\text{ 1,480 square feet}$

So, the total tarp area required to cover the roof, including a 2-foot overhang, is 1,480 square feet.