Guides to Metal Roof Minimum Slope in Corrugated and Standing Seam Profiles

Regardless of your building structure or its purpose, determining the metal roof minimum slope matters if you use the material. There are many benefits when it comes to metal material for roofing.

You might be already aware of using it yourself, such as providing durability, longevity, and water-shedding. The visual aspect is also one of the reasons that make many people choose this exact material.

See Also : Metal Roofing Pros and Cons That You Should Know

Deciding the roof’s pitch is one of the key elements you have to consider when installing a metal roof system. It depends on several factors such as roof profile, site location, building design, climate, etc.

Below you’d find the specification of the minimum slopes of the metal roof that will guide you before installing one.

Minimum Roof Pitch for Metal Building

Among many decisions one has to make when designing a metal building, determining the minimum metal roof slope is one. Roof pitch is the building’s roof slope; it determines how many inches the roof should rise for every 12 inches expanding on the horizontal side.

Some people prefer high pitches and some other choose low roof pitches – each has their own advantages and disadvantages.

Minimum Roof Pitch for Metal Building

However, it is widely agreed that a lower roof pitch is more cost-effective than the other. The reason is they definitely require less material, so the cost required is on the cheaper side. Lower pitch also decreases the total cubic sizes. Therefore it is easier to cool down or heat the building.

It is less visible, so the owner has little to no reason to spend money on colored panels. In conclusion, unless you desire higher clearance of your building’s interior or want a particular exterior aesthetic, it might be beneficial to opt for using a metal roof minimum slope for your metal building.

The metal roof minimum slope doesn’t stray far from other buildings with different materials. The minimum pitch is typically 3:12, meaning the roof should rise 3 inches for every 12 inches of the horizontal foot.

The standard of lower pitch actually ranges between 1:12 to 5:12. Anything above will require you to put out higher costs because they are already considered a higher pitch.

Minimum Pitch for Corrugated Metal Roof

Corrugated roofing is an amazing choice for conventional pitched roofs, despite having severe limitations about the pitch. The corrugated metal roof minimum slope is 5 degrees. It is the recommended slope as there is no guarantee if you opt for a flatter pitch than this.

See Also : Corrugated Aluminum Panels

Minimum Pitch for Corrugated Metal Roof

Most buildings with metal roofing systems are using corrugated roofing types. It is indeed the metal roof profile that is most used worldwide, which can be traced even back to 1820. Here are the few benefits from this roofing profile:


Getting leaks when using the roofing shingles system is a common complaint to be heard. Properly installing corrugated roofing will prevent you from getting this issue and keep your building dry. The waterproof quality can even be enhanced by using coatings such as epoxy or ceramic.

Long durability

Despite being lightweight, corrugated metal roofs have ridges and grooves that contribute to their long-lasting life. They are not prone to corrosion, which guarantees durability for the owner. It also has a non-combustible property that makes it fireproof as well. It can also withstand extreme weather or climate conditions.

Easy to install

As mentioned in the prior point, a corrugated metal roof has lightweight quality, so naturally, it doesn’t need much material for structural support. The installation effort is automatically reduced, and the energy can be spent more on the effective customization plan.

Minimum Pitch Metal Roof Snow

When properly designed and installed, the metal roofing system is famous for its strong performance against harsh climate environments. Several other factors add to this quality, such as proper slope, snow loading requirements, or snow guard usage.

The standard practice is to have higher roof pitches in the places where it snows, storms, or rains heavily, compared to the places with fewer snows and rains.

Minimum Pitch Metal Roof Snow

In-country with heavy snow and tough winter days, the metal roof minimum slope is recommended to be 1:12.

Some opinions standing seam metal roof minimum slope is ¼:12, but it increases the possibility of leaking on the few first days of snow arrival.  

Standing seam is the metal roof profile gaining more popularity nowadays due to its clean and modern looks. These panel systems can be identified to the straight and sleek lines. It also comes in any color to provide suitability for any building’s structure.

Doing research, paying attention, and following common standards are the key to reap the maximum benefits of using a metal panel for your roofing system.

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RoofLast is an experienced author and roofing expert. With years of practical experience in the field authored several informative articles on various aspects of roofing, including installation, maintenance, and repair