1. Understand What Gauge Means in Roofing

Before exploring into specific tips, it’s important to understand what “gauge” refers to in the context of mabati roofing. Gauge indicates the thickness of the roofing sheet. A lower gauge number means a thicker sheet, while a higher gauge number signifies a thinner sheet. For example, Gauge 28 is thicker and stronger than Gauge 30. Understanding this difference is important when deciding which one is suitable for your project.
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Gauge 28: Thicker, more durable, and provides better resistance against harsh weather conditions.
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Gauge 30: Lighter and more affordable, but may not be as durable over time.
2. Consider the Climate and Weather Conditions
Kenya experiences varying climate conditions depending on the region, and this should play a critical role in choosing the right gauge for your mabati roofing. If you’re building in an area that experiences heavy rainfall, high winds, or extreme temperatures, a thicker gauge like Gauge 28 is highly recommended. Thicker sheets are more resistant to damage from these weather elements.
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For coastal regions: Strong winds and salty air mean you need thicker and corrosion-resistant sheets (like Gauge 28) to avoid rusting.
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For inland areas: Areas with hot climates or heavy rains may also require thicker sheets for better durability.
3. Evaluate the Intended Use of the Roof
The purpose of the building will also guide your choice of gauge. A residential home, warehouse, commercial building, or agricultural shed all have different structural and aesthetic needs.
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Residential homes: For homes, Gauge 28 is often ideal for its durability and sound insulation properties.
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Warehouses or storage units: Gauge 30 can work for warehouses or less exposed structures, where cost is a key factor and the load-bearing requirements are lower.
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Agricultural buildings: In rural areas, where budget constraints are often a concern, Gauge 30 is typically sufficient for farm structures.
4. Assess the Roof’s Span and Load-Bearing Requirements
The span of your roof – or the distance between the supports – directly affects how much weight the roof can bear. Thicker gauges (such as Gauge 28) are better for larger spans or roofs with higher load-bearing requirements because they are stronger and more resilient.
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Small roofs: For smaller roofs with short spans, Gauge 30 may suffice.
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Larger roofs: For expansive roofs that cover large buildings or structures, Gauge 28 offers the required strength and load-bearing capacity.
5. Consider the Aesthetic Appeal
While gauge primarily refers to functionality and durability, the appearance of your roof is another key consideration. Thicker gauges tend to offer a more robust, polished look, which is often preferred for high-end homes or commercial buildings. On the other hand, thinner gauges can still be aesthetically pleasing, especially when installed in specific profiles like Bricktile or Roman Tile.
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Gauge 28 provides a more robust appearance, especially in upscale projects.
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Gauge 30 can still look good for practical applications where aesthetics are secondary.
6. Factor in the Cost and Budget
Cost is always a significant factor in any roofing project. Generally, Gauge 30 is cheaper than Gauge 28 because it uses less material and is thinner. If you are working on a tight budget, Gauge 30 may seem like the more economical option, but keep in mind that you might need to replace it sooner than a thicker sheet.
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Gauge 30: Affordable upfront, but may not last as long as Gauge 28.
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Gauge 28: Higher initial cost, but offers better longevity and resistance to environmental factors.
7. Look Into the Durability and Maintenance Needs
Durability and maintenance are essential when selecting the right gauge for your roof. While thinner sheets like Gauge 30 are more prone to denting, corrosion, and wear, thicker sheets like Gauge 28 are more resistant to damage and require less maintenance over the long term. Consider how much time and money you are willing to spend on repairs and replacements.
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Gauge 28: Offers a longer lifespan and needs fewer repairs, making it ideal for long-term use.
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Gauge 30: Requires more frequent maintenance and may need to be replaced sooner.
8. Consider the Installation Process
Thicker gauges, while offering greater durability, can be more challenging to install due to their weight. If your project requires faster installation or if labor costs are a concern, Gauge 30 may be the better choice. It is lighter and easier to handle, which can speed up the installation process.
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Gauge 30: Easier and faster to install, making it more suitable for DIY projects or large teams working on tight timelines.
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Gauge 28: Requires more time and effort during installation due to its weight.
9. Check for Availability and Customization Options
When purchasing mabati roofing sheets, it’s important to confirm whether the supplier offers the specific gauge, profile, and finish that suit your needs. Reputable suppliers like Rocky Rolling Mills can provide customized lengths and special finishes to meet specific project requirements.
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Gauge 28: While more durable, it may be less commonly available in certain profiles or colors.
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Gauge 30: Readily available and offered in various profiles, making it a more accessible option.
10. Consult an Expert or Supplier

One of the best tips when selecting the right gauge for your mabati roofing is to consult with a roofing expert or a trusted supplier like Rocky Rolling Mills. An experienced supplier will guide you through the selection process, helping you choose the appropriate gauge based on your specific needs and budget. They can also provide samples, answer questions, and give insights into the latest trends in roofing materials.
Key Differences Between Gauge 28 and Gauge 30 Mabati Roofing
To help you make a more informed decision, here’s a quick comparison between Gauge 28 and Gauge 30 mabati roofing sheets:
| Feature | Gauge 28 | Gauge 30 |
|---|---|---|
| Thickness | Thicker and stronger | Thinner and lighter |
| Durability | More durable, ideal for long-term use | Less durable, suitable for lighter use |
| Weight | Heavier, offers better strength and support | Lighter, easier to handle and transport |
| Cost | More expensive due to thicker material | More affordable due to thinner material |
| Ideal Use | Residential homes, commercial buildings, warehouses, and larger projects | Small homes, sheds, and temporary structures |
| Resistance to External Factors | Strong resistance to weather, UV rays, and corrosion | Less resistance to external elements |
| Appearance | More rigid and stiff, providing a robust structure | Slightly more flexible, may be prone to bending under harsh conditions |
| Ease of Installation | Requires more effort due to weight, but remains stable once in place | Easier to install due to lighter weight but may not last as long under harsh conditions |
Make an Informed Roofing Investment: Choose the Right Gauge for Your Mabati Roofing Today!
Choosing the right gauge for your mabati roofing is essential for ensuring that your roof performs well over time and meets both your aesthetic and functional requirements. By following these 10 expert tips, you can confidently select the right thickness for your roofing project, taking into account factors such as climate, building type, cost, and durability.
Don’t compromise on quality – invest in high-quality mabati sheets from trusted suppliers like Rocky Rolling Mills to guarantee a reliable, long-lasting roof for your home or commercial project.
Visit Rocky Rolling Mills today to request a quote or speak with an expert about your project.