Many people typically choose thinner galvanized roofing sheets because of cost considerations when constructing or replacing existing roofs on their commercial property, or building new roofs for their home. But the thin galvanized roofing sheet, particularly if the thickness is below 0.2mm, the galvanized roofing sheet form pressed out of the galvanized steel sheet is too brittle, and therefore it won’t be long lasting mai ton dep. This is why many commercial and residential roof contractors prefer the thicker, heavy-duty sheets. That said, most manufacturers recommend against using thinner versions of these galvanized roofing sheet types.
The galvanized steel has its advantages, and disadvantages, as well. For one thing, it’s extremely tough and durable. It’s even been used in war time! And the steel used to create the roof is typically hot rolled or cold rolled, meaning that either edge of the steel is coated with coloring. Some commercial roofing companies even coat all sides with a coating of paint to increase the roof durability.
The galvanized steel is also more efficient and durable than the traditional corrugated variety. It’s more economical because it’s less expensive to make corrugated versions of the galvanized steel roofing. It’s also less expensive to produce, which is why it’s widely used in areas where it is readily available.
The advantages of having a fully prepared galvanized steel sheet that has been installed correctly is that it will stand up better to the elements than a corrugated galvanized steel sheet would. The paint that’s used to protect the steel from rusting will last much longer as well. A good quality sheet will be made of heavy duty steel, but some sheets are made with light gauge steel so they can be used where other types of corrugated galvanized steel sheet would give problems. For example, a metal roof may not stand up well on gravel or loose soil, while a corrugated galvanized steel roof could take on over two feet of water standing water! It will all depend on the climate, of course.
However, there are a number of disadvantages of a fully prepared sheet. One disadvantage is that it can be very difficult to install. If you have a flat roof, for example, it could be hard to get it to the correct height, or vice versa for an angled roof. If you need to add extra insulation, you’ll have to strip off the entire top, which can be very tricky and messy. A corrugated galvanized steel roofing sheet could also rust if it comes in direct contact with saltwater.
Another disadvantage is that it costs more, as compared to full hard corrugated sheet metal. If you need to install a single, smaller galvanized section, you could make do with a low grade galvanized corrugated sheet. The thickness and gauge of these galvanized sections are not going to be much different than a full hard corrugated sheet. You can certainly save money and get a nice, long-lasting metal roof if you use this method.