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Increase the Energy Efficiency of Your Commercial or Residential Property

February 28, 2020 by Infinite Roofing Leave a Comment

What Makes a Roof Energy Efficient?

Why would you want to make your property more energy efficient? Well it would benefit you by saving money on energy bills, creating less strain on HVAC systems, and minimizing your property’s environmental impact. Basically, for a roof to be energy efficient, it needs to do a good job of reflecting the hot air off your roof instead of absorbing it. When a roof absorbs heat, that warmth is radiated into the air inside the building, and pretty soon the entire interior has become much warmer. A roof that reflects the sunlight off and bounces the heat back out into the atmosphere will do a much better job of protecting the home or business from hot air. 

Some roof types that have good reflective qualities are white TPO, PVC and Elastomeric Coatings. Cool roofing is probably the most popular and most effective in terms of energy efficiency for commercial roofs. Residential shingle manufacturers also have cool roofs, but the nuts are very expensive and not yet worth the cost. Manufacturers rate the energy efficiency of the roofing material by what’s called SRI values. You will have a hard time finding SRI values on shingles unless they are part of a cool series line such as GAF’s cool series. A common misconception about shingle roofing is that the lighter the color of the shingle, the cooler the house will be and will result in heating and cooling cost savings. The way the cool shingles work is the granules are coated in a chemical that reflects the heat. The downside is that the coating wears off in time and you will eventually lose your reflectivity, which is where the cost vs savings comes into play. Another roofing material for this type of job is a metal roof. You might think that metal would not be a good choice to save heating and cooling costs because it gets so hot when it sits out in the sun, but that is exactly why it works. The surface of the metal that is exposed to the sun gets super hot because it is reflecting all of the light and heat. Underneath the metal, however, remains relatively cool because the heat has been reflected away. Most commercial buildings will have a metal roofing substrate, and the roofing company will install insulation on top of the metal with a single-ply membrane to ensure the best insulation possible. 

Reflective Roof Coating

A reflective roof coating is applied to roofs to help reflect more sunlight from the surface, reducing the amount of heat absorbed by the roof. Also known as cool roofing, these roof coatings are available for different types of surfaces, in a number of colors and thicknesses, and can make a huge difference when it comes to saving money on energy costs and usage. On top of that, they also aid in creating more comfortable indoor environments, and play a role in prolonging the lifespan of your roof and the roofing materials.

The point of cool roof coatings is to keep the home cool in two distinct ways. The first is by solar reflectivity, or the coating’s ability to reflect sunlight as soon as it hits your structure. Instead of absorbing the sunlight and heat like a traditional roof, a cool roof reflects the light and heat away from your home, keeping your home cooler in the process. The other way that cool roofing helps to keep your home cooler is through thermal emittance. These roof coatings are now made with special materials that increase your roof’s thermal emittance level, or your roof’s ability to radiate absorbed heat back into the atmosphere instead of down into your home. It’s this potent combination of high solar reflectance and thermal emittance that make these roof coatings so effective at keeping your home cool and your energy costs and usage down.

Ventilation Cooling 

Ventilation is the least expensive and most energy-efficient way to cool buildings. Ventilation works best when combined with methods to avoid heat buildup in your home. In some cases, natural ventilation will suffice for cooling, although it usually needs to be supplemented with spot ventilation.

Insulation

Insulation in your home provides resistance to heat flow and lowers your heating and cooling cost. Properly insulating your home not only reduces heating and cooling costs, but also improves comfort. 

To understand how insulation works it helps to understand heat flow, which involves three basic mechanisms: conduction, convection, and radiation. Conduction is the way heat moves through materials, such as when a spoon placed in a hot cup of coffee conducts heat through its handle to your hand. Convection is the way heat circulates through liquids and gases, and is why lighter, warmer air rises, and cooler, denser air sinks in your home. Radiant heat travels in a straight line and heats anything solid in its path that absorbs its energy. Most common insulation materials work by slowing conductive heat flow and to a lesser extent convective heat flow. Radiant barriers and reflective insulation systems work by reducing radiant heat gain. To be effective, the reflective surface must face an air space. 

Regardless of the mechanism, heat flows from warmer to cooler until there is no longer a temperature difference. In your home, during the winter, heat flows directly from all heated living spaces to adjacent unheated attics, garages, basements, and even to the outdoors. Heat flow can also move indirectly through interior ceilings, walls, and floors wherever there is a difference in temperature. During the cooling season, heat flows from the outdoors to the interior of a house. To maintain comfort, the heat lost in the winter must be replaced by your heating system and the heat gained in the summer must be removed by your cooling system. 

An insulating material’s resistance to conductive heat flow is measured or rated in terms of its thermal resistance or R-value. The higher the R-value, the greater the insulating effectiveness. The R-value depends on the type of insulation, its thickness, and its density. The R-value of some insulations depends on temperature, aging, and moisture accumulation. When calculating the R-value of a multilayered installation, you add the R-value of the individual layers. 

Installing more insulation in your home increases the R-value and the resistance to heat flow. In general, increased insulation thickness will proportionally increase the R-value. However, as the installed thickness increases for loose-fill insulation, the settled density of the product increases due to compression of the insulation under its own weight. Because of this compression, loose-fill insulation R-value does not change proportionately with thickness. To determine how much insulation you need for your climate, consult with your local roofing contractor during your free estimate.

Cool Roofs

A cool roof is one that has been designed to reflect sunlight and absorb less heat than a standard roof. Nearly any type of building can benefit from a cool roof, but must consider the climate and other factors that come with the building’s geographic location before deciding to install one. 

Just as wearing light-colored clothing can help keep you cool on a sunny day, cool roofing materials that are designed to reflect more sunlight and absorb less heat than a standard roof complete the same objective. Cool roofs can be made of highly reflective types of paint, a sheet covering, or highly reflective tiles, rubber or shingles. Standard or dark roofs can reach temperatures of 150 degrees F or more in the summer sun. A cool roof under the same conditions could stay more than 50 degrees F cooler and save energy and money by using less air conditioning. 

Beyond the commercial building itself, cool roofs can also benefit the environment, especially when many buildings in a community have them. Cool roofs can reduce local air temperatures, which is sometimes referred to as the urban heat island effect. Lower peak electricity demand, which can help prevent power outages. Reduce power plant emissions, including carbon dioxide, sulfur dioxide, nitrous oxides, and mercury, by reducing cooling energy use in buildings. 

There are many types of roofing systems available, but the surface exposed to the sun is the one that determines if a roof is cool or not. You can usually make a new or existing roof cool by selecting the appropriate surface or applying a roof coating. Cool roof coatings are usually white or special reflective pigments that reflect sunlight. Coatings are like very thick paints that can protect the roof surface from ultraviolet light and chemical damage, and some offer water protection and restorative features. Roof coating products are available for most roof types.  

What is the Most Energy Efficient Roofing Option?

Not only does being more energy efficient help the environment as a whole, but it also can help your pocket book each month. Energy costs, whether it be gas, electricity, or other forms, are at all time highs. Increasing your home’s energy efficiency can be a great help when trying to pay bills. One of the biggest influences on the energy efficiency of a home is the type of roof that it has installed over it. In North America during the summer time it can get really hot, therefore, that means if you are trying to keep that hot air out, you should consider installing a cool roof or cool roof coating. Any homeowner would know that trying to keep the hot air out of the home can be very expensive, simply by running the air conditioner to return the house to a comfortable temperature. When building a residential property or commercial property, picking the right material for your roofing project can make a big difference in your heating and cooling costs down the line.

Filed Under: Acrylic Roof Coating, Commercial Flat Roofing, Commercial Roof Coating, Elastomeric Roof Coating, Flat roof, Metal Roofing, Roof, Roof Coating, Roof Replacement, Roof Shingles, Roofing, Roofing Materials, Silicone Roof Coating

Are You Using The Right Roof Coating?

November 22, 2019 by Infinite Roofing Leave a Comment

Homeowners and building owners generally spend a significant amount of money on roofing. However, they spend a lot more money when they don’t get the proper roofing for their property. No one likes to waste money, especially when your roof should have been done right the first time. Many people are purchasing a spray-applied elastomeric commercial roof coating because it saves them a great deal of money, especially when applied instead of a full commercial roof replacement. However, as mentioned before, when your roofing isn’t done properly you tend to spend a lot more than you should, especially when you have coated your roof twice. This can be very frustrating and you start to think, “Well, why wasn’t this done right the first time?” How can I make sure that I choose the right roof coating for my building? Below we give you some details about elastomeric roof coatings and we will provide you with the information you need to make a final decision on your commercial roof coating. 

Commercial roof coatings often increase the reflectivity, reduce energy consumption and enhance the aesthetics of the roof.  So when we talk about elastomeric roof coating, you should know that it is an elastic coating that can be applied to many different types of roofs. With an elastomeric roof coating, your roof is protected and it will seal the underlying roofing material, helping to stop and prevent leaks. The term elastomeric comes from the coating’s elastic quality so that it stretches and moves. The main reason for applying an elastomeric coating is to make your roof more durable. Some coatings are able to make your building cool. Elastomeric roof coatings can be used on many industrial and commercial roof types. 

Before making any big decisions about an elastomeric roof coating, you need to look more into several factors about your roof. You need to establish exactly what material is currently on your roof and ascertain what coating will be best suited for the property. A local commercial roofing contractor will be able to tell you if your roof needs a repair, full roof replacement, or perhaps just needs a restoration coating. An experienced commercial roofing contractor will be able to give you the best advice on how to proceed.

When reaching out to a commercial roofing contractor it is helpful to know the approximate size, age and the type of roof. This information will help you and your local roofing contractor to establish if your roof should be lasting longer than it is, and the cost to replace the entire roof if needed. You will want to establish the slope of the roof because this weighs on what type of replacement or repair is available to you. You should also gather as much information about your roof’s history such as: has it been coated? Has it had single-ply roofing materials installed over it? Has it suffered the same problems in the past? 

Some of these are pretty basic things that you may know off the top of your head, however, others may require opening up a roof maintenance book or getting on the roof yourself to get the answer. An experienced roofing contractor will have years of knowledge to help you gather all the necessary information to make an informed decision about your roof.

Take into consideration the condition of your roof as well. You may choose the best commercial roof coating but the question is, is your roof a suitable candidate for a roof coating at all? Or do you need to completely remove the roof and replace the roof deck too? If your roof is not structurally sound, no roof coating is a good choice. The building’s location is also a really important thing to consider. Certain climates are more favorable for coating. A dry climate is better for acrylic coatings to be installed, humid and wet climates work better for silicone coatings.

Why is reflectivity such an important consideration?

Light colored surfaces reflect more sunlight than dark surfaces. When sunlight is reflected, less of the sun’s energy is turned into heat. Increasing the reflectivity of your commercial roof will extend the life of your roof and leave your building much cooler in summer, saving you considerable expense on heat regulation. This also means less strain on your HVAC systems and anyone inside the building will be much more comfortable.

Which type of Elastomeric Roof Coating is best for you?

Acrylic Roof Coatings

Acrylic coatings usually have a lifespan of 20 years. Their appearance is typically bright white and provide good reflectivity. Acrylic roof coatings have significant value within the modern property. However many owners often have a limited understanding of the performance of the product and their unique property space. Some negative characteristics of acrylic coatings are that for one it does not stretch out as much as some of the other coatings do, making them susceptible to damage from fluctuating temperatures and ponding water. Another thing is that acrylic coatings usually require a primer and nearly always require two coats. Acrylic roof coatings tend to be more expensive when you consider the additional steps and materials. Some local roofing contractors will tell you that per gallon they are cheaper, however what you need to know is that on any acrylic coating project, with these extra considerations the  price can blow up very quickly.

Besides the downfalls of an acrylic roof coating, it is highly reflective. The sun’s UV rays have a minimal impact on the surface material. Acrylic coatings also provide intuitive performance. Therefore, property owners and an installation team don’t have to spend time learning how to integrate the material and the installation work can be performed in a quick time frame. This ensures that owners consolidate their installation costs and minimize the amount of time required to add the acrylic coating to their building structure. 

Acrylic roof coatings are among the most cost effective commercial roofing systems within the marketplace. Property owners can save thousands of dollars by having the system installed on their roofing structure. And because they’re durable in most environments, property owners can look forward to achieving long lasting value. When your roofing system becomes dirty, the roof reduces its appeal and limits the value received by the building owner. However, having an acrylic roof coating by a commercial roofing contractor will most likely restore your roof’s appeal because it is exceptionally dirt-resistant and maintains its aesthetic appeal over many years. 

Urethane Roof Coating

Urethane roof coatings are another common elastomeric roofing system. It is quite similar in price to silicone coatings, the price usually depends on the specific formulation. Urethane roof coatings usually are chosen because of their durability compared to acrylic and silicone coatings. Urethane coatings don’t offer as much effective reflectivity as silicone or acrylic coatings. A good quality that urethane coatings have is that they offer good protection from ponding water and stay cleaner, resisting dirt more than silicone coatings and acrylic coatings. Urethane roof coatings are most commonly used for sprayed in place polyurethane foam insulation and every other commercial roofing substrate. Without a doubt, a urethane roof coating is one of the strongest and most durable roof coatings on the market today.

When it comes to urethane roof coatings, you should know that there are two different types of urethane coating. They are aliphatic coating and aromatic coating. Aliphatic urethane coatings are UV stable. They also hold color longer, they resist dirt pick up, and are typically used as a topcoat. Aromatic urethane roof coatings are not as UV stable, on the other hand. However, they are less expensive and are typically used as a base coat. Urethane coatings form a highly durable, flexible, seamless membrane layer that is able to withstand the daily expansion and contraction of the roof structure as well as resist ponding water. Therefore, some local roofing contractors would go forward with using this particular coating. Aromatic urethane are less expensive but they are typically used as a base coat. Urethane coatings are more impact resistant than any other commercial roof coatings, making them ideal for use in high-traffic areas. 

Urethane coatings comply very well with most traditional commercial roofing substrates including metal, modified bitumen, spray polyurethane foam, EPDM, TPO, and other single-ply membranes. Urethane coatings are highly reflective and UV stable so building owners and facility managers can save a lot of money from reducing cooling costs during the summer.

Silicone Roof Coatings

Silicone roof coatings are the most flexible material available, and they are often chosen for their ability to compensate for a building’s flexing with changes in temperature. They exhibit great UV resistance and protect the surface beneath the coating very well. Silicone roof coatings are often compared to acrylic coatings due to their similar appearance, but in actual fact silicone coatings are very different and not really comparable. They are more expensive per gallon, but for that extra price tag, you receive better reflectivity, better adhesion, no primer required, only one coat, and a 20-year lifespan. As you can see, the two systems are not similar on a per-project basis. Silicone coatings often start out more expensive per-gallon, but as a whole, the project is less expensive. Silicone roof coatings can also withstand ponding water, which acrylic coatings cannot.

Two major concerns with silicone coatings are dirt accumulation and durability. These coatings do pick up a lot of dirt, so they should be used in areas where aesthetics are important. The coatings can be easily power-washed, but they will become dirty and require cleaning again quite frequently. Their durability is also sometimes a question mark, although if you are careful not to drop sharp objects on the roof they should be fine. Another way to avoid the durability problem is to install granules on the roof surface.

Summary

In short, there are many considerations when choosing a commercial roof coating for your property. An experienced commercial roofing contractor like our team here at Infinite Roofing, is well equipped to answer any of your questions and come out to your property and provide you with a thorough assessment, advice and estimate for any work you may require. Give us a call today! 518-444-ROOF

Filed Under: Acrylic Roof Coating, Commercial Roof Coating, Elastomeric Roof Coating, Silicone Roof Coating Tagged With: Energy Efficiency, local roofing contractors

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