Corrugated Metal Panels
Corrugated metal panels are manufactured all around the world and are commonly used as low-cost roofing solutions.
Corrugated metal roofing is a metal sheet that is roll-formed into metal panels. These panels are then attached to the roof with screws. The traditional shape of corrugated sheet metal is round and wavy. It is low cost, lightweight, durable, energy-efficient, long-lasting, and easy to install. Corrugated metal roofing is an excellent alternative to asphalt shingles or clay tile roofs. It is used for commercial and residential applications and both metal roofing and metal siding projects.
A corrugated metal panel, as described here, is not a single product. These units are manufactured all around the world and are common as low-cost roofing solutions. Though often referred to locally as iron, aluminum, or metal sheets, typical corrugated roofing sheets are made of steel. Not all are galvanized, and they vary from 27 gauge to 10 gauge. A standard sheet is one meter wide with a corrugated wave period of approximately 15cm and a peak to peak amplitude of 5cm. Sheets typically come in three lengths: 3 meters, 2.5 meters, and 2 meters. There are many companies and distributors; therefore, the links provided here are, for example, only.
Most urban centers have the resources to cut and mold such simple roofing sheets. The rolls of raw steel are often imported.
The weakest gauge can run as low as 3.5 to 6 USD per panel. Heavier 27 gauge can cost 12 USD or higher depending on geographic location. Price will increase in rural areas.
Standard corrugated roofing panels are available in every urban center in the world. Less expensive options include organic roofing material such as banana leaves or thatch. However, these options have shorter effective life spans and are vulnerable to fire. Stronger, more resilient options such as concrete roofs and clay tiles are time-consuming to manufacture or are cost-prohibitive for the slimmest of budgets. Other metal options include standing seam metal roofing of interlocking metal strips, interlocking metal shingles, or modular panels. The other metal options are less available in most developing contexts but are becoming an opportunity for innovation.
Consumers, developers, or international aid organizations seeking inexpensive shelter solutions. Low-income housing owners and affordable housing/realty developers are some of the main users of this product. In addition, international non-government organizations often use metal panels to construct school and community scale building projects.
As one of the most common building materials globally, corrugated metal panels have standard applications and informal, recycled uses. Below are a few notable articles written by practitioners in the field. These articles cover manufacturing and construction methods and the pros and cons of structures built with the product.
- Roofing in Context: The Perfect Slum Blog
- Roofing How To: Alternative Building Blog
- Roofing Discussion + Commentary: Corrugated Metal Roofing Blog
No patent seems to be enforced (as it has several manufacturers worldwide).
This product can be purchased directly from manufacturers, distributors, local vendors. International organizations also use them.
Size of the component
List of primary materials in the component
List of secondary materials in the component
Measurement, calculated in hours, of the component’s resistance to fire
R value associated with material/product
The compressive strength of the component, measured in megapascals
List of suitable climates for use of this components
A standard sheet is one meter wide and comes in three lengths: 3 meters, 2.5 meters, and 2 meters. Not all are galvanized, and they vary from 27 gauge to 10 gauge. The panels have a corrugated wave profile period of approximately 15cm and a peak to peak amplitude of 5cm. Aligned on roofing structure, overlapping one peak and valley, the product effectively covers 80cm. The corrugation creates a flexible width and rigid length.
The rusty panels can be replaced easily when assembled properly.
As the panels rust and become less effective, they are often consolidated to contribute to the wall, window, door systems, and informal constructions. Non-galvanized sheets are more prone to rust than the galvanized ones.
Typical panels themselves do not present health risks. However, when placed upon low structures with poor ventilation, solar gain can transfer substantial heat to the interior. This can create unfavorable conditions for occupants.
Panels are typically paired with framed roofing structures. Roofing nails, with a 1.5cm dia. cap, are typically located on every other peak. Sealing washers are preferred.
In warm climates, dropped ceilings are important for both thermal and acoustic (during rains) comfort.
This informative blog discusses manufacturing processes and applications for such panels.
Relevant (American) standard: Steel Deck Institute
It is important to pair corrugated metal roofing with proper ventilation or a suspended ceiling to minimize solar heat transfer to interior spaces and reduce acoustic transmission when it rains.
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