How To Prevent Metal Roof Wind Damage in Corpus Christi TX

Metal roof wind damage is a common fear among Corpus Christi TX homeowners planning to invest on a new metal-based roofing material. The latter is lightweight in comparison to traditional roofing materials especially aluminum and copper. Many wonder whether these materials are feasible especially in high-wind and hurricane-prone areas that can blow it off completely.

Many reputable and reliable roofing contractors in Corpus Christi TX with decades of experience and knowledge confidently say that metal roofs can perform exceptionally in high-wind areas. Metal roof wind damage is avoidable with the right installation process, as McElroy Metal mentions here.

The Technical Factors That Reduce Metal Roof Wind Damage

The main contributing factor that affects wind performance of metal roofs is the spacing and size of the sub-structural framing or decking that the panel will attach to. Open framing (purlins) spaced more closely together will have better panel performance than those spaced farther apart. Similarly, metal or wood decking that is thicker will have better performance than similar, but thinner, materials.

In theory, a thru fastened metal roof could withstand almost any amount of wind if the appropriate amounts of fasteners are used. Snap-lock style panels would be the worst as far as uplift performance is concerned, and mechanically seamed panels typically perform exceptionally when clips are able to be spaced closely together. (Continued)

In their statement, it means an excellent installation guarantees none to minimal metal roof wind damage in any possible hurricane or high-wind weather. However, the property design matters greatly too. The property's roof design makes the material and roof deck prone to uplift, which will lead to massive metal roof wind damage.

The Construction Specifier has a great explanation on the roof design specifications designers and engineers should comply with in high-wind areas. If you're to replace your roof, this is a great reference to see whether metal roofs are great to use with your property.

Metal Roof Wind Damage: Building Design Risk and Exposure Categories

There are many factors an engineer must consider when calculating wind uplift pressures per ASCE 07-10. One of these concerns is identifying what type of risk to human life the building is protecting, as classified into four categories:

• I—buildings representing low risk to human life in the event of failure—an example would include an agricultural building;
• II—all buildings not covered by the other three categories;
• III—buildings representing substantial hazard to human life, including schools, public assembly spaces, power stations, and water treatment facilities; and
• IV—buildings designated as essential facilities (e.g. emergency services and shelters).

Engineers must also consider where a building is positioned in relation to other structures around it. This will affect the ultimate design wind speed used in their calculation. There are three different Exposure Categories:

• D—buildings located in flat, unobstructed areas not prone to hurricanes;
• C—buildings located in areas with scattered obstructions, generally less than 9.1 m (30 ft) high;
• B—buildings located in urban and suburban areas where structures are closely spaced together. (Continued)

We can conclude through these two sources that in preventing any possible metal roof wind damage, homeowners need to install their metal roofs in the proper method possible. Therefore, DIY roofing is out of the question. However, if you have experience or are confident in your skills, then you can execute a metal roof installation properly.

If you had to choose between corrugated and standing seam metal, it's better to choose standing seam metal roofs. They're highly durable and have a dense body that can prevent metal roof wind damage. The most important part is the proper interlocking of each standing seam panel as per Roofing Calculator's instruction.

How to Install Metal Roofs The Best Way

Step 1 – Installing the drip edge

Installation of the drip edge is usually a rather simple process, but for a novice roofer it can be a challenge. I’ll take a step back to the first part of this guide – when prepping your deck, make sure that the old drip edge is completely removed and all rotten wood (boards or plywood sheeting) is replaced.

There are several opinions as to whether install drip edge under or over the underlayment. In theory if you install drip edge over the underlayment, then run-off rainwater may get underneath it. In reality, metal drip edge gets installed so tightly, that water just rolls over it. Therefore I always install underlayment first, and then go over with the drip edge. (Continued)

Remember, a proper metal roof installation guarantees your roof will suffer no possible wind damage. If you have yet to find a reliable roofer, Galvan Builders is here to help. We have decades of experience installation and securing metal roofs against wind damage. Contact us today!

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Galvan Builders Construction Company
4938 Williams Drive,
Corpus Christi TX 78411
361-857-4341
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