Energy-efficient Asphalt Shingles A Comprehensive Guide

Manufacturing Process of Energy-Efficient Asphalt Shingles

The manufacturing process of energy-efficient asphalt shingles differs significantly from traditional methods, incorporating materials and techniques designed to enhance reflectivity and reduce heat absorption. This leads to lower energy consumption in buildings, reducing cooling costs and improving overall sustainability. The key differences lie in the selection of raw materials and the incorporation of specialized coatings.

Energy-efficient asphalt shingles typically begin with a base mat, usually fiberglass, which provides structural integrity. This is then coated with a modified asphalt formulation, often containing polymers to enhance its durability and flexibility. A crucial element is the addition of reflective granules. These granules, usually made from ceramic or other materials with high solar reflectance, are embedded in the top layer of the shingle. The color and composition of these granules are carefully selected to maximize their ability to reflect solar radiation, thus reducing the amount of heat absorbed by the roof.

Material Selection and its Impact on Energy Efficiency

The choice of materials significantly influences the energy efficiency of the final product. Fiberglass mats, compared to organic felt, offer superior dimensional stability and resistance to moisture, extending the shingle’s lifespan and reducing the need for premature replacement. Modified asphalt formulations, often incorporating polymers like styrene-butadiene-styrene (SBS) or atactic polypropylene (APP), enhance the shingle’s resistance to cracking and deformation under extreme temperatures. This improved durability reduces the need for frequent repairs or replacements, further contributing to energy savings over the shingle’s lifetime. Finally, the reflective granules play the most significant role. Granules with high solar reflectance index (SRI) values – typically above 25 – are crucial for effective heat reflection. The higher the SRI, the less heat the roof absorbs.

Comparison of Manufacturing Processes

The manufacturing process for energy-efficient asphalt shingles largely follows the same basic steps as traditional asphalt shingles, but with key differences in material selection and application. Traditional shingles typically use organic felt as a base mat and standard asphalt formulations. The granules used are often chosen for their aesthetic appeal rather than their thermal properties. In contrast, energy-efficient shingles emphasize the use of fiberglass mats, modified asphalt, and high-SRI granules. The manufacturing process may also incorporate additional steps, such as applying specialized coatings to further enhance reflectivity or weather resistance.

Manufacturing Process Flow Chart

The following table illustrates the steps involved in manufacturing energy-efficient asphalt shingles.

Step Description
1. Base Mat Production Fiberglass strands are combined and formed into a continuous mat.
2. Asphalt Application Modified asphalt is applied to the base mat, ensuring even coverage.
3. Granule Application High-SRI granules are applied to the asphalt layer, usually by automated methods.
4. Cooling and Setting The shingles are cooled to allow the asphalt and granules to set properly.
5. Cutting and Packaging The solidified shingles are cut to the desired size and packaged for distribution.

Material Composition and Properties

Energy-efficient asphalt shingles utilize a carefully selected blend of materials to achieve superior thermal performance and extended lifespan. Their composition differs significantly from traditional asphalt shingles, incorporating elements designed to enhance reflectivity and emissivity, thereby reducing heat absorption and improving energy efficiency. The precise balance of these materials is crucial for achieving the desired performance characteristics.

The primary components contribute to the shingle’s energy-saving properties and overall durability. Understanding the role of each material is essential to grasping the overall effectiveness of these advanced roofing systems.

Asphalt Binder

The asphalt binder serves as the adhesive that holds the shingle together. In energy-efficient shingles, modified asphalt binders are often used. These modifications can include polymers like styrene-butadiene-styrene (SBS) or atactic polypropylene (APP), which enhance the binder’s flexibility, durability, and resistance to temperature extremes. These modifications improve the shingle’s ability to withstand thermal cycling, preventing cracking and extending its lifespan. The higher quality and modified nature of the asphalt binder contribute directly to the shingle’s longevity and overall performance.

Mineral Surfacing Granules

The mineral granules, typically made from crushed stone or slate, are the visible surface of the shingle. Their color and composition play a critical role in energy efficiency. Light-colored granules, particularly those with high reflectivity (albedo), significantly reduce the amount of solar radiation absorbed by the roof. This reduces the heat transferred to the building’s interior, lowering cooling costs. The selection of granules is based on their reflectivity and their ability to withstand weathering and UV degradation. For example, granules with a high albedo of 0.35 or higher can significantly reduce roof surface temperatures.

Reflective Coating

Some energy-efficient shingles incorporate a reflective coating beneath the mineral granules. This coating, often a polymer-based material with high infrared reflectivity, further enhances the shingle’s ability to reject solar heat. This coating works in conjunction with the light-colored granules to create a highly reflective surface. The combined effect is a significant reduction in heat absorption, resulting in lower energy consumption for cooling. The thickness and composition of this reflective layer directly impact its effectiveness.

Base Mat

The base mat, typically fiberglass or organic felt, provides structural support to the shingle. In energy-efficient shingles, the base mat’s properties are often optimized for dimensional stability and resistance to moisture. A strong, durable base mat ensures the shingle maintains its integrity over time, contributing to its longevity. The choice of base mat material also influences the shingle’s overall weight and flexibility.

Thermal Properties: Reflectivity and Emissivity

The thermal performance of energy-efficient asphalt shingles is characterized by their high reflectivity and emissivity. Reflectivity refers to the percentage of solar radiation that is reflected away from the shingle surface. High reflectivity means less solar heat is absorbed by the roof. Emissivity refers to the shingle’s ability to radiate absorbed heat back into the atmosphere. High emissivity means that any heat absorbed is quickly radiated away, reducing the overall temperature of the roof. The combination of high reflectivity and high emissivity results in a significant reduction in roof surface temperature, leading to energy savings. For example, a shingle with a reflectivity of 0.35 and an emissivity of 0.90 would perform significantly better than a traditional shingle with lower values.

Material Composition and Shingle Lifespan

The careful selection and balance of materials significantly impacts the shingle’s lifespan and durability. The modified asphalt binder, coupled with a robust base mat and weather-resistant granules, contribute to the shingle’s resistance to cracking, curling, and degradation from UV radiation and moisture. A high-quality, energy-efficient shingle can be expected to have a longer lifespan compared to traditional shingles, reducing the frequency of costly roof replacements. The improved durability translates to lower long-term maintenance costs and a greater return on investment.

Energy Efficiency Metrics and Standards

Assessing the energy efficiency of asphalt shingles involves understanding key metrics that quantify their ability to reflect solar radiation and emit absorbed heat. These metrics directly impact a building’s energy consumption and contribute to a more sustainable roofing solution. Industry standards and certifications provide a framework for evaluating and comparing the performance of different shingle products.

The primary metrics used to evaluate the energy efficiency of asphalt shingles are solar reflectance and thermal emittance. Solar reflectance, often expressed as a percentage, measures the ability of a shingle’s surface to reflect sunlight. A higher percentage indicates greater reflectivity and less heat absorption. Thermal emittance, also expressed as a percentage, measures the ability of a shingle to release absorbed heat back into the atmosphere as infrared radiation. A higher percentage signifies better heat dissipation, reducing the amount of heat transferred into the building.

Solar Reflectance and Thermal Emittance Values

Solar reflectance and thermal emittance work synergistically to determine a shingle’s overall energy efficiency. For instance, a shingle with high solar reflectance (e.g., 0.35 or 35%) will absorb less solar radiation, reducing the amount of heat transferred to the building. Simultaneously, a high thermal emittance (e.g., 0.85 or 85%) ensures efficient release of the absorbed heat, further minimizing the building’s cooling load. The combined effect of high reflectance and high emittance significantly reduces energy consumption associated with cooling.

Industry Standards and Certifications

Several organizations establish standards and certifications for energy-efficient roofing materials. These standards provide a consistent framework for evaluating and comparing the performance of different products. Compliance with these standards often requires testing and verification by accredited laboratories. Key certifications often include Energy Star, Cool Roof Rating Council (CRRC), and other regional or national programs that promote energy-efficient building practices. These certifications often specify minimum requirements for solar reflectance and thermal emittance to qualify for the designation.

Comparison of Energy-Efficient Shingle Brands

The following table compares the energy efficiency ratings of various energy-efficient shingle brands. Note that specific values can vary based on color and specific product lines. This data is for illustrative purposes and should be verified with the manufacturers’ current product specifications.

Brand Solar Reflectance Thermal Emittance Certification
Brand A 0.38 0.88 Energy Star, CRRC
Brand B 0.35 0.85 CRRC
Brand C 0.40 0.90 Energy Star

Cost-Benefit Analysis

Choosing between energy-efficient and traditional asphalt shingles involves a careful consideration of initial investment versus long-term savings. While energy-efficient shingles have a higher upfront cost, their superior insulation properties translate to significant reductions in energy bills over the lifespan of the roof. This analysis examines the financial implications of this choice, highlighting the potential return on investment.

The initial cost difference between energy-efficient and traditional asphalt shingles can vary depending on several factors, including the shingle type, manufacturer, and geographic location. Generally, energy-efficient shingles command a premium of approximately 10% to 30% over their traditional counterparts. For example, a 2,000 square foot roof might see an added cost of $1,000 to $3,000 for energy-efficient shingles compared to a standard option. This increased initial investment is offset by considerable long-term savings.

Long-Term Cost Savings

Energy-efficient asphalt shingles reduce energy consumption by reflecting more solar radiation and providing better insulation. This leads to lower heating and cooling costs. The extent of these savings depends on factors such as climate, home insulation, and HVAC system efficiency. However, studies have shown that energy-efficient shingles can reduce energy bills by 10% to 20% annually. For a homeowner with an average annual energy bill of $2,000, this could translate to savings of $200 to $400 per year. Furthermore, reduced roof temperature can extend the lifespan of the underlying roofing materials, potentially delaying the need for costly repairs or replacements. In a scenario where a standard roof might require replacement after 20 years, energy-efficient shingles, due to reduced heat stress, might extend that lifespan by a few years, further adding to the cost savings.

Return on Investment

The following table illustrates a hypothetical return on investment (ROI) over a 25-year period, comparing a 2,000 square foot roof using traditional versus energy-efficient shingles. This is a simplified example and actual results will vary based on specific circumstances.

Item Traditional Shingles Energy-Efficient Shingles
Initial Cost $5,000 $6,000
Annual Energy Savings $0 $300
Total Energy Savings (25 years) $0 $7,500
Roof Lifespan (years) 20 23
Replacement Cost (assuming $5,000) $5,000 (after 20 years) $5,000 (after 23 years)
Net Cost (over 25 years) $10,000 $3,500
Return on Investment (after 25 years) N/A $6,500

This example demonstrates that, despite the higher initial cost, the energy savings and potentially extended lifespan of energy-efficient shingles can lead to a substantial return on investment over the long term. It’s crucial to consult with roofing professionals and obtain accurate cost estimates for your specific situation and location to determine the most financially advantageous option for your home.

Environmental Impact

Energy-efficient asphalt shingles offer significant environmental advantages compared to traditional roofing materials. Their reduced energy consumption during manufacturing and their extended lifespan contribute to a smaller overall carbon footprint and lessen the strain on natural resources. This section details the environmental benefits and compares the lifecycle impacts of energy-efficient and conventional shingles.

The environmental benefits of energy-efficient asphalt shingles stem primarily from their improved insulation properties. By reflecting more solar radiation and reducing heat transfer through the roof, these shingles lower the building’s cooling load, leading to reduced energy consumption for air conditioning. This translates directly into decreased greenhouse gas emissions, a key factor in mitigating climate change. Furthermore, the use of recycled materials in their composition further minimizes environmental impact by diverting waste from landfills. The longer lifespan of these shingles also reduces the frequency of roof replacements, minimizing the associated resource consumption and waste generation involved in manufacturing and disposal.

Lifecycle Environmental Impact Comparison

A comprehensive lifecycle assessment (LCA) is crucial for evaluating the environmental performance of building materials. An LCA considers the entire life cycle of a product, from raw material extraction and manufacturing to use, maintenance, and eventual disposal. Studies comparing energy-efficient asphalt shingles with conventional options typically show a reduction in global warming potential (GWP) for the energy-efficient alternatives. This is largely due to the lower energy consumption associated with their use, offsetting some of the potential environmental impacts of manufacturing. For example, a study conducted by [Insert credible source and study details here, including specific data if available. E.g., “a study published in the Journal of Sustainable Building Materials in 2023 found that energy-efficient shingles reduced GWP by an average of 15% compared to standard asphalt shingles.”] demonstrates the clear environmental benefits of choosing these higher-performance materials. The specific differences will vary based on the specific shingle composition and the geographical location, but the overall trend favors energy-efficient options.

Key Environmental Advantages

The following points summarize the key environmental advantages of energy-efficient asphalt shingles:

  • Reduced energy consumption for building cooling due to increased solar reflectance and thermal insulation.
  • Lower greenhouse gas emissions, contributing to reduced global warming potential.
  • Decreased reliance on fossil fuels in manufacturing and transportation.
  • Potential for incorporation of recycled materials, diverting waste from landfills.
  • Extended lifespan reducing the frequency of roof replacements and associated waste generation.

Installation and Maintenance

Proper installation and regular maintenance are crucial for maximizing the energy efficiency and longevity of energy-efficient asphalt shingles. These shingles, often featuring enhanced reflective properties or improved insulation, require careful handling and specific techniques to ensure optimal performance. Neglecting proper installation can compromise their energy-saving capabilities and shorten their lifespan.

The installation process generally follows similar steps to traditional asphalt shingle installation, but with a heightened emphasis on precision and attention to detail. Variations may exist depending on the specific shingle type and manufacturer’s instructions. Always consult the manufacturer’s detailed installation guide for the best results.

Proper Installation Techniques

Several key steps contribute to a successful and energy-efficient installation. These steps ensure the shingles are correctly positioned, sealed, and protected from the elements, maximizing their thermal performance and longevity.

  • Underlayment Selection and Installation: Using a high-quality underlayment, such as a synthetic felt, is vital. This provides an extra layer of protection against moisture and wind damage, crucial for maintaining the shingles’ integrity and energy efficiency. Proper overlapping and securing of the underlayment prevents water penetration.
  • Starter Course Installation: A properly installed starter course provides a straight and even base for the subsequent shingle layers. This ensures a uniform and aesthetically pleasing roofline while also improving the overall seal against moisture.
  • Shingle Alignment and Nailing: Accurate alignment of shingles and proper nailing are essential. Using the correct number of nails per shingle and placing them in the designated locations, as specified by the manufacturer, ensures secure attachment and prevents wind uplift. Over-nailing can damage the shingles, while under-nailing can lead to premature failure.
  • Flashing and Sealants: Proper flashing around chimneys, vents, and other roof penetrations is crucial to prevent water leakage. Using high-quality sealants around these areas maintains the roof’s watertight integrity and protects the underlying structure.
  • Ridge and Hip Installation: The ridge and hip caps require careful installation to ensure a weathertight seal. Proper overlapping and sealing of these areas prevents water penetration and ensures the longevity of the roof.

Maintenance Requirements

While energy-efficient asphalt shingles are designed for durability, regular maintenance is still necessary to prolong their lifespan and maintain their energy-saving properties. This involves addressing potential issues before they escalate into major repairs.

  • Regular Inspections: Conducting visual inspections at least twice a year, particularly after severe weather events, allows for early detection of damage such as missing or damaged shingles, loose flashing, or granule loss. Early identification prevents more extensive and costly repairs.
  • Cleaning Debris: Removing leaves, branches, and other debris from the roof prevents moisture buildup and potential damage to the shingles. Regular cleaning also maintains the shingles’ reflective properties, maximizing their energy efficiency.
  • Moss and Algae Removal: Moss and algae growth can damage shingles and reduce their reflective properties. Regular cleaning or treatment with appropriate solutions can prevent these issues and maintain the roof’s energy efficiency.
  • Gutter Maintenance: Keeping gutters clean and free of debris prevents water from overflowing onto the roof, which can cause damage and compromise the shingles’ performance.

Best Practices for Long-Term Performance

Implementing best practices during and after installation significantly contributes to the long-term performance and energy efficiency of energy-efficient asphalt shingles. These practices help to prevent premature degradation and maximize the return on investment.

  • Professional Installation: Hiring a qualified and experienced roofing contractor ensures proper installation, minimizing the risk of errors that can compromise the shingles’ performance and warranty.
  • Adherence to Manufacturer’s Instructions: Strictly following the manufacturer’s installation and maintenance guidelines is essential for maximizing the shingles’ lifespan and warranty coverage. Deviation from these instructions can void warranties and compromise performance.
  • Regular Maintenance Schedule: Establishing and adhering to a regular maintenance schedule helps prevent small problems from escalating into costly repairs. This proactive approach ensures the shingles remain in optimal condition and maintain their energy-saving capabilities.

Impact on Building Energy Performance

Energy-efficient asphalt shingles significantly contribute to a building’s overall energy performance by reducing heat transfer through the roof. This translates directly into lower energy consumption for heating and cooling, resulting in cost savings and a smaller environmental footprint. The reflective properties of these shingles play a crucial role in mitigating the effects of solar radiation on the building’s interior.

The primary mechanism by which energy-efficient asphalt shingles improve building energy performance is their high solar reflectance and thermal emittance. Solar reflectance refers to the percentage of solar radiation reflected by the shingle’s surface, while thermal emittance describes the shingle’s ability to radiate heat away from the building. Higher values for both properties mean less solar heat is absorbed by the roof, leading to lower roof surface temperatures and subsequently reduced heat transfer into the building’s interior. This effect is particularly pronounced during hot summer months, significantly decreasing cooling loads. Conversely, during colder months, the reduced heat loss through the roof contributes to lower heating loads.

Effects on Heating and Cooling Loads

The reduction in heating and cooling loads achieved through the use of energy-efficient asphalt shingles varies depending on factors such as climate, building design, and the specific shingle’s properties. However, substantial reductions are commonly observed. In hot climates, the decreased solar heat gain can result in a noticeable reduction in air conditioning energy consumption. Similarly, in colder climates, the improved insulation provided by these shingles can lead to lower heating bills. These savings can be substantial over the lifetime of the roofing system.

Impact on Building Energy Rating: A Hypothetical Example

To illustrate the impact of energy-efficient asphalt shingles on a building’s energy rating, consider a hypothetical single-family home in a moderate climate. The following table compares the estimated annual energy consumption for heating and cooling with standard asphalt shingles versus energy-efficient shingles. This example assumes a building with a similar design and size. These values are estimations and actual results may vary based on numerous factors.

Feature Standard Asphalt Shingles Energy-Efficient Asphalt Shingles
Annual Heating Energy Consumption (kWh) 12,000 10,000
Annual Cooling Energy Consumption (kWh) 15,000 12,000
Total Annual Energy Consumption (kWh) 27,000 22,000
Estimated Annual Energy Cost Savings ($) (Assuming $0.15/kWh) 750
Estimated Improvement in Energy Star Rating 3 Stars 4 Stars

This hypothetical example demonstrates a significant reduction in overall energy consumption and associated cost savings through the implementation of energy-efficient asphalt shingles. The improved energy efficiency also translates to a higher energy star rating, reflecting a more environmentally friendly and cost-effective building. Note that the specific energy savings and rating improvements will vary significantly based on location, building design, and other factors.

Comparison with Other Roofing Materials

Choosing the right roofing material involves considering several factors beyond initial cost. Energy efficiency, longevity, and maintenance requirements all play crucial roles in the overall lifecycle cost and environmental impact. This section compares energy-efficient asphalt shingles with metal and tile roofing, focusing on these key aspects.

Energy-efficient asphalt shingles, while offering a balance of cost and performance, are often compared against metal and tile roofing due to their differing material properties and associated energy performance. This comparison highlights the trade-offs inherent in selecting a roofing system for various climates and building types.

Energy Efficiency Comparison

Energy efficiency in roofing materials is primarily determined by their ability to reflect solar radiation (solar reflectance) and emit absorbed heat (thermal emittance). Higher values for both properties indicate better energy efficiency, leading to lower cooling costs. While energy-efficient asphalt shingles boast improved solar reflectance and thermal emittance compared to traditional asphalt shingles, they generally fall short of metal and tile roofing in this regard. Metal roofs, particularly those with light colors, exhibit significantly higher solar reflectance, minimizing heat absorption. Clay and concrete tiles also possess good reflective properties, though their performance varies depending on color and surface texture. The following table summarizes these differences:

Roofing Material Solar Reflectance (Typical Range) Thermal Emittance (Typical Range) Energy Efficiency Rating (Qualitative)
Energy-Efficient Asphalt Shingles 0.25 – 0.35 0.85 – 0.90 Moderate
Metal Roofing (Light Color) 0.50 – 0.70 0.85 – 0.95 High
Clay Tile (Light Color) 0.30 – 0.45 0.80 – 0.90 Good
Concrete Tile (Light Color) 0.25 – 0.40 0.80 – 0.90 Good

Note: These values are typical ranges and can vary significantly depending on the specific product and color.

Cost Comparison

The initial cost of roofing materials varies greatly. Energy-efficient asphalt shingles generally represent a lower upfront investment compared to metal or tile roofing. However, the long-term cost implications, including maintenance and lifespan, must be considered. Metal roofing, while more expensive initially, often boasts a much longer lifespan, potentially offsetting the higher initial cost over the building’s lifetime. Tile roofing also carries a higher initial cost and requires specialized installation, further impacting the overall expense.

Durability and Lifespan Comparison

Durability and lifespan are key factors influencing the overall cost-effectiveness of a roofing system. Energy-efficient asphalt shingles typically have a lifespan of 20-30 years, depending on the quality and climate conditions. Metal roofing systems often last 50 years or more with proper maintenance, while high-quality tile roofs can endure for 50-100 years or longer. This significant difference in lifespan should be factored into the overall cost comparison.

Future Trends and Innovations

The field of energy-efficient asphalt shingles is constantly evolving, driven by increasing concerns about climate change and the escalating costs of energy. Ongoing research and development are focused on creating roofing materials that not only provide superior weather protection but also significantly contribute to reducing a building’s energy consumption. This involves advancements in materials science, manufacturing techniques, and the integration of smart technologies.

The development of even more energy-efficient asphalt shingles is poised for significant advancements in the coming years. These advancements will likely focus on enhancing reflectivity, improving insulation properties, and incorporating innovative technologies to optimize energy performance. This will involve a multi-pronged approach encompassing material science, manufacturing processes, and the integration of smart technologies within roofing systems.

Advancements in Material Composition

Research is actively exploring the incorporation of novel materials into asphalt shingles to enhance their energy-efficiency properties. For example, the use of advanced polymers and additives can improve the reflectivity (albedo) of the shingle surface, reducing the amount of solar heat absorbed by the roof. Another promising area is the development of lightweight, high-performance insulation materials that can be integrated directly into the shingle structure, minimizing heat transfer. This could involve incorporating materials like aerogels or advanced foams known for their exceptional insulating capabilities while maintaining structural integrity. One example is the ongoing research into using phase-change materials (PCMs) within the shingle structure. PCMs absorb heat during the day and release it slowly at night, moderating temperature fluctuations within the attic space. This effect can significantly reduce the load on HVAC systems.

Innovations in Manufacturing Processes

Improvements in manufacturing processes are also crucial for creating more energy-efficient asphalt shingles. The use of precision manufacturing techniques can lead to more consistent and uniform shingle properties, optimizing their thermal performance. Furthermore, advancements in automation and robotics can increase production efficiency while reducing waste, contributing to a more sustainable manufacturing process. For example, the implementation of automated quality control systems can ensure that each shingle meets the required specifications for reflectivity and thermal insulation, minimizing energy losses due to manufacturing defects. This results in a more consistent and predictable performance across the entire roofing system.

Role of Technology in Enhancing Energy Performance

The integration of smart technologies holds significant potential for enhancing the energy performance of roofing systems. This includes the incorporation of sensors and monitoring systems to track energy consumption and optimize building performance. For instance, smart shingles could incorporate embedded sensors to monitor temperature, humidity, and solar irradiance, providing real-time data on the roof’s energy performance. This information can be used to optimize the building’s HVAC system and reduce energy waste. Additionally, the integration of photovoltaic (PV) cells into asphalt shingles is gaining traction, turning the roof into a distributed energy generation system. While currently still in the relatively early stages of widespread adoption, these solar shingles offer the potential to significantly reduce a building’s reliance on the grid and contribute to its overall energy independence. The development of more efficient and cost-effective PV integration technologies will be crucial for accelerating the adoption of this promising innovation.

FAQ Guide

What is the lifespan of energy-efficient asphalt shingles?

The lifespan varies depending on the brand, quality, and climate, but generally, they last 20-30 years, similar to traditional asphalt shingles.

Are energy-efficient asphalt shingles heavier than traditional shingles?

The weight difference is usually minimal and rarely impacts structural considerations. However, it’s always best to check with a roofing professional.

Do energy-efficient shingles require special installation techniques?

While the basic installation process is similar, manufacturers may have specific recommendations. Consult the manufacturer’s instructions for best results.

How much do energy-efficient asphalt shingles cost compared to standard ones?

They typically have a higher upfront cost, but the long-term energy savings often offset this initial investment.