If you&#;re looking to acquire solar panels, your first step is to determine whether your roof is suitable for a solar panel system. And if you plan to use solar panels on a home you&#;re building, roof design should be on your mind as well.
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Either way, roofing styles and materials come in many different types. Understanding how these factors influence solar panel installations can be challenging.
As an experienced solar panel company, in Freedom Solar we&#;ll give you insights about which roofs work best for solar panels. When you know the best roof for solar panels at your home, you&#;ll make sure your system stays stable and secure for optimal performance.
Many types of roofs work great for solar panels, but here are the top types to choose from.
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Shingle roofs are the most common type of roofing on homes and comprise either composite or asphalt shingles. Composite shingles are made of a combination of materials, such as laminate, wood and slate. Asphalt shingles are made of either a cellulose mat or fiberglass, with asphalt added at the end of the manufacturing process.
While both options are flexible, composite shingles are a bit more durable than their asphalt counterpart.
Overall, installing solar panels on shingle roofs is quite simple, requiring standard penetrating mounts that easily attach.
For installation, technicians drill studs into the roof for the solar panels to attach to. Then, they close off the spaces between the panels and studs. Finally, they seal the system with flashings to prevent water from leaking between the roof and panels &#; and potentially into your home.
Many homeowners (or homebuilders) use shingle roofing because it&#;s inexpensive and durable. In fact, shingle roofing lasts between 12 and 20 years, which makes it great for attaching solar panels that you&#;ll likely keep on your roof for decades.
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Metal roofs work great for solar panel installations and is one of the easiest to install on. If your home has a metal roof with standing seams, technicians can easily attach solar panels because they don&#;t require any drilling for attachment. And because there&#;s no need for drilling, there&#;s no need to hire contractors or crews, which saves you labor costs during the home solar installation process.
Additionally, metal roofs are beneficial on homes and businesses in sunny, warm areas &#; such as Texas, Colorado and Florida. That&#;s because metal roofs reflect any light that doesn&#;t hit solar panels, which keeps houses and buildings cooler.
One of the main reasons that people choose metal roofing for their homes is because of its impressive life cycle. A metal roof can last anywhere from 40 to 125-plus years. On the downside, a metal roof is about two to three times more expensive than other roofing materials and can be noisy during inclement weather. Luckily, if you have solar panels on your home, the panel system blocks some of the noise.
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If you have a tile roof, technicians can install solar panels using a standard penetrating mount that raises them slightly above the roof. Because tiles don&#;t always have uniform shapes, cutting or removing some tiles might be necessary to make way for mounts. In turn, this effort can result in extra labor costs.
Tile shingles can be made of slate, concrete and clay. Installing solar panels on clay tile presents some hurdles that aren&#;t present with standard shingle roofs.
For one, how you move across the roof itself is radically different. Clay tile is highly resilient to the elements, but it&#;s not so resilient to installation teams&#; footsteps. However, solar power installers at Freedom Solar are meticulous when servicing this market &#; we&#;re well trained on moving across clay roofs without breaking tiles.
Although tiled roofs are visually pleasing because they have more range in appearance, they&#;re typically heavier and more expensive than other roofing materials. (Granted, they&#;re not as expensive as metal roofs.) Nonetheless, they&#;re long-lasting and generally more waterproof than other roofing types.
Tile roofing is widespread in California and Arizona, and it&#;s growing in popularity nationwide. For example, in areas like Central Texas, preferences are changing alongside spiking population rates.
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Although most tar and gravel rooftops are flat (some sloped roofs use tar and gravel), you can still install solar panels on them. However, you&#;ll need to ensure technicians mount and angle your solar panel system at 30 degrees with tilt brackets. This guarantees your panels receive optimal sunlight for energy generation.
And even though working on flat roofs is easy, you should still consider hiring a labor crew or contractor to mount and orient your solar panel system. This is doubly true if you&#;re inexperienced with the installation process.
Many homeowners like tar and gravel rooftops because they&#;re budget-friendly and have about a 20- to 25-year life span. Plus, they have tight seals to prevent cracks and leaks and provide a strong, flat support surface for your solar panel system.
[Related: Here&#;s What You Need To Know Before Installing Solar Panels on Your Home]
Ultimately, the best roof angle for solar panels is about 30 degrees to maximize energy output. However, that doesn&#;t mean solar panels won&#;t work for roofs with steeper or flatter slopes.
For optimal solar panel performance, you&#;ll want to add 15 degrees to your latitude in the winter, then tilt the solar panel system to whatever that number is. For the summer, subtract 15 degrees from your latitude and angle the solar panel system accordingly.
Most roofs aren&#;t extremely steep. Even if yours is, your solar panels will likely still function well enough to produce enough energy for your home. Although the ideal roof angle is about 30 degrees, if your roof tilt is at 40 degrees, this decreases energy generation by only about 1%.
Any roof that&#;s over 40 degrees is probably too steep. If full energy independence is your goal, then a solar panel system might not be a feasible addition to your home.
You can find solar panels just as easily on flat rooftops as on sloped rooftops.
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The solar panel installation process for flat roofs is usually much simpler than it is for sloped roofs because it&#;s easier to move around. And that means the installation process is quicker.
Solar installations on flat roofs don&#;t need the penetration mounts that sloped roofs need for the system to stay secure. Alternatively, technicians use weighted mounting systems (aka ballast systems) for flat roofs, which don&#;t require drilling into the roof. This type of system eliminates the need for holes and uses gravity to ensure your solar panel system is stable.
However, because flat roofs clearly don&#;t have an angle, technicians use tilt-up brackets to keep your system angled at 30 degrees.
The best direction for solar panels is south. But if your roof doesn&#;t face south, you can angle solar panels southeast or southwest.
Depending on which hemisphere you live in, this answer could be the opposite. For people in the Northern Hemisphere, the sun travels along the southern part of the sky as the Earth orbits throughout the year, so your solar panels need to face south. Similarly, people in the Southern Hemisphere need to angle solar panels north (or northeast or northwest).
The roof space you need for solar panels fully depends on your solar panel type and manufacturer, your home&#;s size and how much electricity you generally use daily.
For example, 1 square foot of roof space can generate around 15 watts of solar energy with an average-sized solar panel. A smaller home might need only 200 square feet of roof space for panels. However, larger homes would need more solar panels &#; and thus more roof space (about 1,000 square feet) &#; to keep the lights on.
If you use a lot of electricity, you&#;ll likely need more roof space to accommodate more solar panels to meet your power requirements.
Generally speaking, average homes use from 19 to 23 solar panels, with each panel needing up to 18 square feet of space. Your roof should have about 400 to 600 square feet of available space. Plus, consider any skylights, dormers or chimneys that might decrease your total usable roof space.
[Related: How Many Solar Panels Do I Need?]
Solar panels and their required mounting equipment, whether penetration or weight mounts, typically weigh 3 to 4 pounds per square foot. Usually, this weight is acceptable for any roof type.
However, solar panels with weighted ballasts on flat roofs generally weigh a bit more because concrete blocks hold the system in place.
As long as your home has a fairly new roof that&#;s in decent condition, weighted ballasts are a fine solution. That&#;s especially true if you have SunPower solar panels. SunPower offers the lightest solar panels in the industry, at about 33 pounds per panel.
Solar panels aren&#;t bad for your roof, but you should consider some factors, especially during the installation process. Because drilling is necessary to secure panels to the roof, the process leaves holes that could lead to water leaks over time.
A professional solar panel company can ensure installation avoids long-term damage to your roof &#; and ultimately to your home. Because solar panel systems have a 30- to 35-year life cycle, it&#;s important that technicians install your panels correctly the first time around!
And while drilled holes in your roof never seem appealing, numerous safety measures help ensure drilling won&#;t result in any damage. We&#;ll tell you a bit about the process.
First, technicians use drilled holes for lag bolts, which secure the solar panel system&#;s mounting rack. To avoid water leakage, technicians fill the holes with a sealant. Then, they surround the lag bolts with metal or plastic flashings &#; a sort of shield that fits under whatever roof tile type you have. Finally, they seal the flashings air-tight with either tar or another durable material to ensure your roof doesn&#;t suffer damage or seepage.
[Related: Uninstalling and Reinstalling Solar Panels]
If you&#;re worried that solar panels might make your home look &#; not as appealing as you&#;d like, remember that you have options!
For example, black shingles typically look best with solar panels. Although black absorbs sunlight, which can make your home feel a bit warmer, darker roofs help blend the appearance of solar panels so that they don&#;t drastically stand out.
At Freedom Solar, we offer solar panels in varying options. That said, their signature black aesthetic features all-black solar cells and antireflective glass, which look chic and sleek on any roof type.
And the benefits go beyond aesthetics. Whatever type of roof or solar panels you have, they&#;re a good look because they represent your character, values and commitment to sustainability.
[Related: 10 Questions To Ask Before You Consider Installing Solar Panels]
To learn more about solar panels or the installation process for your home or business, contact solar power installers Freedom Solar today! Call us at (877) 795-, or submit an online inquiry. We&#;re ready to help you go solar anytime.
Freedom Solar also has it&#;s own solar repair and maintenance service department if needed. Our experienced team can maintain, repair and upgrade any system for maximum energy production and efficiency
Featured image credit: Ulrike Leone from Pixabay
Asphalt shingles are by far the most common roofing material, and for good reason: they're affordable, durable, and flexible. Asphalt roofs typically last about 12 to 30 years, depending on the quality of the shingles and where you live. Higher-quality asphalt shingles are best for solar panels because you don't want your system to outlive your roof. Due to their prevalence, every reputable installer should be comfortable installing a solar energy system on an asphalt roof. If you have an asphalt roof, your installer will drill studs into your roof and attach solar panel mounts at those locations. Your installer will then seal the space between the studs and shingles and cover it with flashing &#; a metal plate that prevents water infiltration &#; so your roof won't leak.
If you have a metal roof, you're in great shape for solar! Metal roofs typically last 40 to 75+ years, are non-flammable, and can be energy efficient &#; if your metal roof is light in color, it will reflect light and heat, keeping your house cool. However, they're pretty expensive to install, and this high upfront cost can deter people from choosing metal as a roofing material. Installing solar on a metal roof requires a slightly different skill set and different racking equipment, so you'll want to choose an installer that has experience working with metal roofs. However, if your metal roof has standing seams, your installer can attach the solar panels directly to the seams, eliminating the need for drilling holes and lowering the labor costs associated with your installation!
Tile roofs are most common in locations with hot climates or close to the ocean due to their durability. These roofs can last over a century, so you can feel confident that your tile roof will outlast your solar system (assuming it was installed within the last 50 years). However, they're more expensive than asphalt roofs (but typically cheaper than metal roofs) and can complicate your solar installation. While installing solar on a tile roof is possible, you should expect higher labor costs because your installer will likely need to remove tiles and replace them with a mounting foot and flashing because of their brittleness. Not all installers have the skill set for installing solar on tile roofs, so you should confirm that your installer is confident working with this roof material.
Tar and gravel roofs work well with solar because they're supportive and energy efficient (gravel reflects sunlight). They'll typically last about 20 to 30 years and are easy to patch and repair if any damage does occur. However, if you have a tar and gravel roof, your roof is probably relatively flat, so you'll need some additional hardware to ensure your solar panels are pitched at the best angle. While this extra hardware can increase installation costs, it also allows you to provide optimal orientation and angle of your solar energy system, which could lead to more significant long-term savings.
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