Metal Roof Waterproofing Cost

Are you planning to waterproof your metal roof? You might be wondering about how much it is going to cost. Waterproofing a metal roof can be a costly process, but it is necessary to protect your roof from water damage and extend its life. In this article, we will discuss the factors that affect the cost of waterproofing a metal roof, the average cost of the process, and the benefits of waterproofing.

Factors that Affect the Cost of Waterproofing a Metal Roof

Several factors can affect the cost of waterproofing a metal roof. Some of these factors are:

Roof Size and Slope

The size and slope of your roof can affect the cost of waterproofing. A larger roof requires more materials, labor, and time to waterproof, which can result in a higher cost. Similarly, a steeper roof requires more caution and safety measures, which can add to the cost.

Type of Waterproofing Material

The type of waterproofing material you choose can also affect the cost. There are various types of waterproofing materials available in the market, such as asphalt, acrylic, silicone, and polyurethane. Each material has its properties, advantages, and disadvantages, and different costs.

Degree of Damage

The degree of damage or wear and tear on your metal roof can also impact the cost of waterproofing. If your roof has severe damage, such as cracks, holes, or rust, it might require more Repair work before waterproofing, which can increase the cost.

Labor Cost

The labor cost involved in waterproofing a metal roof can vary depending on the location and experience of the professionals. Local roofing Contractors’ fees may differ from larger companies, and experienced professionals may charge higher fees.

Additional Accessories

Additional accessories, such as gutters, downspouts, skylights, or vents, can also add to the cost of waterproofing. These accessories require specialized waterproofing solutions, which can result in increased cost.

Average Cost of Waterproofing a Metal Roof

The cost of waterproofing a metal roof can vary between $1.50 to $10 per square foot, depending on the factors mentioned above. However, the average cost of waterproofing a metal roof is about $5 per square foot. This cost includes materials, labor, and other additional expenses.

For example, if you have a medium-sized roof of 1500 square feet, the average cost of waterproofing could be around $7500. This cost can increase or decrease based on the type of materials, damage, and additional accessories.

Benefits of Waterproofing a Metal Roof

Waterproofing a metal roof provides several benefits that justify the cost. Some of these benefits are:

Prevents Water Damage

Waterproofing prevents water from seeping into your roof and causing damage. Rainwater can cause rust, corrosion, and structural damage to your roof, leading to costly repair or replacement costs. Waterproofing protects your roof from these damages and extends its life span.

Energy Efficiency

Waterproofing can also make your roof more energy-efficient. With proper insulation, waterproofing can keep your attic cooler in the summer and warmer in winter, reducing the amount of energy required to cool or heat your Home.

Improves Aesthetics

Waterproofing can also improve the appearance of your roof. It gives your roof a uniform and clean look, and also enhances the overall look of your home.

Increases Property Value

Waterproofing can increase the value of your property. A well-maintained and waterproofed roof is an attractive feature for potential buyers and can increase your property’s resale value.


1. How often should I waterproof my metal roof?

It is recommended to waterproof your metal roof every five to ten years to protect it from water damage.

2. Can I waterproof my metal roof on my own?

Waterproofing a metal roof requires expertise and specialized knowledge. It is recommended to hire a professional roofing contractor for the job.

3. How long does the waterproofing process take?

The time required for waterproofing depends on the size of your roof, the degree of damage, and the type of waterproofing material used. The process can take between a few days to a few weeks.


Waterproofing a metal roof is a crucial process to protect your roof from water damage and increase its lifespan. The cost involved in waterproofing depends on various factors such as roof size, type of material, damage, labor, and accessories. The average cost of waterproofing a metal roof is around $5 per square foot. However, it is a worthy investment as it provides several benefits such as water damage prevention, energy efficiency, aesthetics, and increased property value. It is recommended to hire a professional roofing contractor to get your metal roof waterproofed.

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