7 Crucial Reasons Why You Need to Waterproof Your Metal Roof

Metal roofs are increasingly popular for their durability, longevity, and energy efficiency. They're a fantastic choice for homeowners looking for a long-lasting, eco-friendly roofing solution. However, even with their impressive benefits, metal roofs require proper waterproofing to truly maximize their potential. 

While they resist rot and mildew naturally, they are still susceptible to water damage if not adequately protected. 

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Here are seven compelling reasons why waterproofing your metal roof is essential:

1. Preventing Costly Leaks

Rainwater pooling on your roof can find its way inside through even the smallest gaps or imperfections. This can lead to significant damage to your home's interior, including ruined furniture, damaged appliances, and compromised structural integrity. 

Waterproofing creates an impermeable barrier, preventing these leaks and protecting your belongings. It's especially crucial in areas prone to wind-driven rain, which can force water around chimneys, vents, skylights, and dormers. A telltale sign of leaks is mold or mildew growth, particularly in damp areas like around windows, door frames, and behind showers.

2. Combating Moisture Damage and Corrosion

Beyond direct leaks, moisture from humidity and condensation can also wreak havoc on a metal roof. Condensation occurs when warm, moist air inside your home meets cold surfaces like your metal roof. Over time, this moisture can lead to rust and corrosion, significantly shortening your roof's lifespan. 

Repairs or replacements due to corrosion can be costly, especially if your roof has skylights that require extensive work to replace. Waterproofing acts as a shield against this moisture, preventing long-term damage.

3. Ensuring Proper Installation Around Roof Penetrations

Any penetration in your roof, such as skylights, vent pipes, plumbing stacks, and chimneys, creates potential entry points for water. Proper waterproofing during installation is crucial to prevent leaks and subsequent rust or corrosion around these areas. 

Sealants are used to create a watertight seal, preventing wind-driven rain from getting under the roofing material. Improper sealing can also disrupt your gutter system's functionality, causing overflows and potential damage to your home's foundation.

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4. Avoiding Blisters and Bubbling

Blisters and bubbling occur when moisture becomes trapped beneath the metal roofing and evaporates unevenly, often near chimneys or other areas with varying temperatures. This can be a slow process, with bubbles only becoming visible after prolonged exposure to temperature fluctuations. 

Left unchecked, these blisters will eventually lead to leaks and further damage, making waterproofing a preventative measure, not just a reactive repair.

Read More On: Blisters in Concrete - Identification and Causes

5. Protecting Your Investment and Aesthetics

Most metal roofing manufacturers offer substantial warranties, often up to 30 years. However, these warranties typically depend on proper installation and waterproofing. DIY waterproofing can be risky, as undetected leaks can cause significant damage before you even notice a problem.

Investing in professional waterproofing from the outset protects your investment and ensures your roof maintains its aesthetic appeal for years to come. Hiring separate contractors for installation and repairs can be significantly more expensive in the long run than contracting a single, reputable company for the entire project.

6. Addressing Environmental Concerns (Asbestos)

In older homes, existing asphalt shingle roofs may contain asbestos. If you're installing a metal roof over these existing shingles, it's crucial to test for asbestos before any work begins. 

Asbestos fibers are a health hazard when disturbed. If asbestos is present, you must hire a qualified professional to handle its safe removal and disposal before the new roof is installed. Waterproofing in this scenario is part of a larger safety and environmental concern.

7. Prioritizing Safety

Asbestos fibers, if present, are extremely dangerous when inhaled. Waterproofing a metal roof over asbestos-containing materials should only be done by trained specialists who can safely remove and dispose of the asbestos before installing the new roofing system. This protects both the workers and the inhabitants of the building from potential health risks.

Also Read: 5 Ways to Insulate Your Metal Building

Conclusion

Waterproofing is not an optional extra for metal roofs; it's a fundamental part of ensuring their longevity and performance. By addressing potential issues like leaks, moisture damage, and environmental hazards, waterproofing protects your investment, maintains your home's structural integrity, and provides peace of mind. 

Whether you're building a new home or upgrading an existing one, prioritize professional metal roof waterproofing to reap the full benefits of this excellent roofing material.