How Weather & Climate Impact Commercial Roofing Performance Over Time

A commercial roof is a substantial investment for your business, which is why you’ll want to ensure it can withstand the elements for the long term. Weather conditions play a major role in determining the lifespan and performance of your roof. Unlike residential roofing systems, commercial roofs are usually flat or low-sloped, making them prone to particular environmental risks. In the article, we look at how your weather and climate conditions can impact your commercial roofing and what you can do about it.

Sun And Heat Damage

The harsh South Florida sun can cause high temperatures on your roof throughout the summer months. Over time, solar UV rays break down your commercial roofing materials by causing them to become brittle and crack. Prolonged heat exposure can cause weathering on asphalt, rubber, and even metal roofing over time, which is why it’s important to invest in a UV-resistant coating to help delay signs of heat damage.

Thermal Expansion

Another factor that plays a destructive role is the constant expansion and contraction of your roofing membrane, causing small repetitive movements. These small movements can lead to stress fractures and loosening fasteners, which compromise your membrane integrity. Investing in a high-quality commercial roof material will help minimize the effect of expansion and contraction to ensure the roof stands up well against the sun to ensure its longevity.

Wind Uplift

Hurricane season can cause excessively strong winds to blow throughout South Florida. Wind doesn’t just blow across your roof; it also blows along the side and creates an upward-pulling motion. Prolonged strong winds can begin to pull your roof membrane away from the deck. Your roof can actually tear away from the roof deck, effectively dislodging fasteners and creating leaks. Strong winds can also drive objects, such as branches and loose objects, which can puncture your roofing membrane. Investing in a preventative roof maintenance plan is key to preventing wind damage to your commercial roof. A full roofing inspection will identify any loose roofing materials while also replacing any damaged roofing components.

Rain Damage

Water is enemy number one when it comes to a compromised roof. Even the smallest weakness in your roof membrane can cause a small leak to develop. Commercial roofs are particularly susceptible to pooling water because of their poor drainage Water should never sit on a roof for an extended period of time, as this is bound to cause issues. Water pooling can lead to additional weight on your roof, causing your roof deck to possibly warp or bend. Stagnant water can also be a breeding ground for algae and mold. Organic materials slowly secrete acidic materials, leading to premature roof decay.

Another factor to be aware of is driving rain. Most commonly occurring during hurricane season, driving rain is blown horizontally by the wind, causing it to penetrate under your roofing membrane. Water can bypass flashing and enter into vulnerable areas of your home. Driving rain can also lead to abrasive action on your roof covering, causing the coating to weather away. Consulting with a roofing professional will ensure that your commercial property is prepared and protected from driving rain, preventing any roofing emergencies.

How Climatic Factors Affect Different Commercial Roofing Materials

The weather conditions mentioned will have differing effects on various roofing materials.

Asphalt Shingles

Hot weather can cause shingles to become brittle and more likely to crack. Prolonged sun exposure can also lead to warping, compromising your roof covering’s effectiveness. Shingles don’t offer the longest lifespan for commercial roofs and should only be considered for smaller commercial applications.

Single-Ply Membranes

These ‘rubber-like’ roofing membranes are made from synthetic polymers and offer effective protection against South Florida climatic conditions. TPO and PVC are both known as cool roofs, as they’re well designed for warmer weather and offer reflective properties to keep your roof and interior cooler. They’re versatile and increase energy efficiency due to their reflective nature.

Metal Roofing

Metal roofing is incredibly heat resistant, making it a solid option for commercial roofing applications. It offers incredible longevity and may well be the last roof you ever need to install. Keep in mind, however, that metal roofing comes in at a higher price point than asphalt and single-ply roofing options.

Investing In Adaptive Roofing Systems

South Florida’s hot and wet climate is here to stay, which means that commercial building owners need to invest in adaptive roofing solutions. As mentioned above, cool roofing systems are a solid adaptive roofing option to help reduce heat. Here are a few other options to speak to your roofer about.

Enhanced Wind Resistance

Installing stronger fasteners and hurricane straps both helps to secure your roof to the wall and the roof deck. It’s also good to check your roof sheathing and decking to ensure they’re tightly attached and that they fall in line with South Florida wind uplift code requirements.

Improved Insulation

Be sure to invest in a quality commercial roofing insulation such as Polyiso, XPS, or SPF, each of which offers their unique strengths and benefits. Good-quality insulation regulates indoor temperatures and thereby reduces the stress of your roofing membrane caused by expansion and contraction. It’s also advisable to ensure adequate roofing ventilation, as this removes heat and moisture buildup.

Advanced Waterproofing

It’s a good idea to invest in advanced waterproofing techniques ahead of South Florida’s wet season. A reputable roofer will be able to provide waterproofing solutions, including flashing upgrades and effective drainage installations. Your roof may also need a reseal to enhance waterproofing qualities.

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