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Your Commercial Metal Roof Might Be Leaking Because of These Three Reasons

There are different types of roofing options in the market. There is asphalt shingles, clay tiles, slate shingles, green roof, etc. However, if there is a roofing option that lasts longer, requires little maintenance, stands up to all weather conditions, and cuts down energy costs, it is the metal roof. But, all these qualities do not make metal roofs indestructible. These roofs can leak too. In this blog, we will take a look at common reasons why properly installed metal roofs can leak. Let’s get started!

Screws Driven In The Metal Roof

You will be surprised to know that most leaks in metal roofs are caused by roofing screws. The job of the screws is to form a seal so that water stays out. It achieves this by pressing a rubber washer present at the base of the screw head. A sort of gasket gets formed between the roofing panel and the screw head when a screw is driven into the metal roof panel. Properly driven screws form a proper gasket but under driving screws, driving screws at an incorrect angle, overdriving screws, or screws that miss the framing member, all allow water to penetrate through the metal roof.

Stack Flashings

Many commercial metal roofs leak through the stack flashings, which are basically flashings around the pipes that go through the metal roof. Many things go through your metal roof such as plumbing pipes, HVAC vents, air vents, etc. The job of the stack flashings is to waterproof the pipe by creating a seal using its rubberized material. These flashings form a double seal. One is formed by staying flat on the metal roof surface and another one is formed by squeezing the pipe from all sides. Although these seals are strong, constant expansion and contraction of the metal roof make them weaker over time. Also, the rubberized material degrades over time under direct sunlight. You should replace old stack flashings to keep your building dry.

Worn Out Sealants

It has been found that metal roof sealants that are installed together with the metal roof do not hold out as long as metal roofing panels do. They need to be changed with regular roof maintenance. You need to fill up sealants around areas such as roof transitions, metal ridge caps, counter flashings, Z flashings, pitch pans, etc., as they all wear with time. It is therefore essential to use only sealants that are specifically made for metal roofs. As we all know, metal roofs expand and contract. If you want sealants to last longer and offer protection against water penetration, you must only use sealants that are flexible and can stretch with the metal without breaking their seal.

So, there you have it. These are some of the most common causes of leaks in metal roofs. You can get in touch with a reputable metal building contractor like the Metal Guard for getting your metal roof inspected for leaks and their possible causes. Proper metal roof sealing is essential for keeping water out of your building. With the help of an experienced metal building contractor, you will be able to seal your metal roof in the correct way.

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6 Preventative Tips To Prevent Leaking Metal Roof Situation

In the crowd of clay roofing shingles, high-density slate, and synthetic thatched installations among the popular roofing choices, metal roofing has slowly yet claimed its spot across every Texas home. Considering the high functionality, durability, esthetic versatility, speed, and ease of installation, the one-time high installation costs are now being overlooked by homeowners. People can see the long-term benefits of metal roofing. However, preventative maintenance care is a must even for the sturdiest metal roof installation. People often tend to let go of any maintenance measures thinking that it’s “metal” (read: sturdy and invincible). This causes dangerous leaking metal roof situations and premature roof failure across different structures.  

Being in the metal roofing industry for over 20 years, in most cases, the major roof repairs we undergo could have easily been prevented with a little bit of TLC. Here are our top expert-recommended tips for you:


Clean your metal roof regularly to get rid of stains, dirt, leaves, mildew, and other debris. Apart from looking unappealing, it also ruins the paint system of your metal roof.


Your gutter system includes downspouts and drains boxes. The clogging of drains and gutters can lead to water overflow, increasing premature corrosion for every metal roof material.


Elements of nature include tree twigs, branches, leaves, stones, among many other things. If left unattended, their degradation can ruin the material of your roof, leading to metal roof leaking, falls, scratches, denting, among other severe roof issues.


Corrosion is the worst enemy for every metal. It’s like cancer for metal roofs. The most vulnerable spots for corrosion are around chimneys, HVAC vents, air conditioner installation spots, or any other oil condensers above cooking areas. Excessive steam, heat, and chemicals can break down the protective paint layer and lead to corrosion.


Houston is home to more extreme weather conditions than other US states. Therefore, a professional maintenance inspection is a must to overcome the impact of torrid weather conditions. Your location plays a role in deciding the frequency of scheduled maintenance. If your home is lying under the shade of trees, you will need to call for professional inspections at least twice a year (or every six months). Speaking from experience, this is way less expensive than the repair you will probably require if you forego this point.


Damaged roof parts may include loose flashings, fasteners, loose sheets, closures, ridge caps, venting materials, and more. Cracks, penetrations, dents, and seams in your metal roof will fail to prevent water entry, thus leading to a leaking metal roof. Make sure to take assistance from reliable professionals to cover up any holes and cracks with a quality roof sealant.

Aging, severe weather events, among other factors, can decrease the longevity of your metal roof. A regular maintenance schedule with a reliable team of experts preserves your investment while saving your time and efforts for repairs keeping up the appearance of your metal roof. If you would like some professional assistance for metal roof maintenance from our qualified metal roofers, dial (+713)-449-3430 today!