What Is More Than 1 Roof Called?

Have you ever wondered what it’s called when you see more than one roof in a building? Well, wonder no more! In this article, we will explore the fascinating answer to this question and provide you with insightful information. From the types of roofs to their architectural significance, get ready to delve into the world of multifaceted rooftops. So, let’s jump straight into it and uncover what is more than one roof called!

Multiple Roofs

Definition of Multiple Roofs

Multiple roofs refer to the presence of more than one roof structure within a building or a complex. While a typical building usually has a single roof, there are instances where multiple roofs are incorporated for various purposes. These structures can vary in design, material, and functionality, providing unique characteristics and benefits to the overall building.

Types of Multiple Roofs

There are several types of multiple roofs commonly found in buildings:

  1. Split Roof: A split roof consists of two separate roof sections that meet at a central point, creating a visually appealing design. This type of roof is often seen in traditional and contemporary architecture, adding a distinctive element to the overall building.

  2. Gable Roof Extensions: Gable roof extensions are additional roof structures attached to an existing gable roof. These extensions can provide extra space, such as creating a covered patio or expanding a living area. They serve both functional and aesthetic purposes.

  3. Dormer Roofs: Dormer roofs are small structures that protrude from a larger roof. They typically contain a window and are used to create additional space within an attic or upper floor. Dormer roofs add architectural interest while allowing for increased natural light and ventilation.

  4. Annex Roofs: Annex roofs are separate roof structures added to an existing building to expand its usable space. These roofs are commonly used in commercial buildings or institutions to accommodate growth or create separate areas for various functions.

Complex Roof Structures

Definition of Complex Roof Structures

Complex roof structures are characterized by their intricate design, often incorporating multiple angles, slopes, and levels. These roofs showcase exceptional craftsmanship and architectural prowess. They require advanced engineering techniques and skilled labor to ensure their stability and functionality.

Examples of Complex Roof Structures

  1. Cathedral Roofs: Cathedral roofs, also known as vaulted roofs, are characterized by their high, arched design resembling the interior of a cathedral. They often create a sense of grandeur and expansiveness in spaces like churches or large residential buildings.

  2. Mansard Roofs: Mansard roofs have a distinct double-slope design with a steep lower slope and a flatter upper slope. They are commonly found in historical buildings and offer practical advantages like maximizing usable space within the attic while adding a touch of elegance to the overall architecture.

  3. Butterfly Roofs: Butterfly roofs feature two roof sections that slope inward, resembling the shape of butterfly wings. This unique design allows for rainwater collection in a central trough, making them environmentally sustainable while providing a visually striking appearance.

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Multilevel Roofs

Definition of Multilevel Roofs

Multilevel roofs, as the name suggests, consist of multiple levels or tiers within a roof structure. These roofs are designed to provide different functionalities and can be found in both residential and commercial buildings.

Benefits of Multilevel Roofs

  1. Maximizing Space: Multilevel roofs allow for efficient utilization of vertical space, enabling the creation of additional living or working areas without expanding the building’s footprint.

  2. Improved Natural Light and Ventilation: By incorporating different levels, multilevel roofs often facilitate enhanced natural light penetration and improved airflow, creating a more comfortable and sustainable indoor environment.

  3. Visual Appeal: Multilevel roofs add visual interest to a building’s exterior, contributing to its architectural aesthetics and uniqueness.

Design Considerations for Multilevel Roofs

When designing multilevel roofs, several key factors need to be considered:

  1. Structural Integrity: Ensuring the stability and structural integrity of the multilevel roof is crucial. Professional structural analysis and engineering expertise are required to ensure the roof can safely support the additional weight and complexity.

  2. Accessibility: Designers must consider ease of access between different levels of the multilevel roof. Stairs, ramps, or elevated walkways may be necessary to provide convenient movement and optimize usability.

  3. Water Drainage: Proper water drainage is essential to prevent leaks and water damage within a multilevel roof. The design should incorporate effective gutter systems and appropriate slopes to direct water away from the building.


Definition of Roofline

The roofline of a building refers to the outline or profile created by the roof’s edge as seen from the exterior. It plays a significant role in the overall architectural design and contributes to the building’s character and aesthetic appeal.

Roofline Design Considerations

Designing the roofline requires careful consideration of various factors:

  1. Architectural Style: The roofline should be consistent with the architectural style of the building. Whether it is a simple and clean modern design or a more intricate and ornate traditional style, the roofline must align harmoniously with the overall visual theme.

  2. Proportions: The proportions of the roofline, including the height and length of each slope or section, should be carefully balanced to create a visually pleasing composition.

  3. Material Selection: The choice of roofing materials, such as shingles, tiles, or metal, greatly impacts the appearance of the roofline. The selection should complement the building’s style and colors while also considering durability and maintenance requirements.

  4. Integration with Surroundings: The roofline should blend seamlessly with the surrounding environment, landscape, and neighboring structures, ensuring the building harmoniously fits into its surroundings.

Multiplex Roof

Definition of Multiplex Roof

A multiplex roof refers to a roof structure that serves multiple functions or purposes simultaneously. It combines various design elements and features to meet diverse requirements within a building or complex.

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Features of Multiplex Roofs

  1. Energy Efficiency: Multiplex roofs often incorporate energy-efficient features such as solar panels or green roofing techniques. These roofs contribute to reduced energy consumption and a more sustainable building design.

  2. Versatility: Multiplex roofs are adaptable and flexible in their use. They can accommodate different activities, functions, or amenities, catering to the needs and preferences of the building occupants.

  3. Integration of Technology: With advancements in technology, multiplex roofs can be designed to incorporate smart systems, such as automated shading, rainwater harvesting, or integrated lighting controls, enhancing comfort and convenience within the building.

  4. Space Optimization: Multiplex roofs make efficient use of available space by combining various functionalities into a single structure. This allows for increased functionality without compromising on the building’s footprint.

Roof Assemblies

Definition of Roof Assemblies

Roof assemblies refer to the components and materials that collectively form a complete roof system. These assemblies are designed and installed to provide weatherproofing, insulation, structural support, and other necessary functions.

Types of Roof Assemblies

  1. Built-Up Roofing System: Built-up roofing systems consist of multiple layers of bitumen, incorporating insulation layers and a protective membrane. These roofs are durable, resistant to weathering, and suitable for flat or low-sloped roofs.

  2. Single-Ply Roofing System: Single-ply roofing systems use a single layer of synthetic or rubber membrane to provide waterproofing and protection against the elements. These roofs are lightweight, easy to install, and commonly used in commercial and industrial buildings.

  3. Metal Roofing System: Metal roofing systems utilize metal panels or shingles to create a durable and long-lasting roof. They offer excellent weather resistance, energy efficiency, and are available in a variety of styles and colors to suit different architectural designs.

  4. Green Roofing System: Green roofing systems involve the installation of vegetation and growing media on the roof surface. These roofs provide insulation, reduce stormwater runoff, improve air quality, and contribute to the overall sustainability of the building.

Roof Systems

Definition of Roof Systems

Roof systems encompass all the components and elements that work together to create a functional and efficient roof. These systems integrate various elements to ensure proper weatherproofing, insulation, ventilation, and structural stability.

Components of Roof Systems

  1. Roof Deck: The roof deck forms the base of the roof system, providing structural support and a surface for other roof components to be attached.

  2. Weatherproofing Layers: Weatherproofing layers, such as underlayment or waterproof membranes, prevent water penetration and protect the roof against leaks.

  3. Insulation: Insulation materials are installed to regulate heat transfer, improving energy efficiency and maintaining a comfortable indoor temperature.

  4. Roof Covering: The roof covering, such as asphalt shingles, tiles, or metal panels, provides the outermost layer of the roof system, protecting it from environmental elements and enhancing its visual appeal.

  5. Ventilation: Proper ventilation ensures adequate airflow within the roof system, reducing moisture buildup, preventing mold growth, and prolonging the lifespan of the roof.

  6. Flashing: Flashing, typically made of metal, is used to seal joints and transitions within the roof system, ensuring a watertight seal and preventing water damage.

Composite Roofs

Definition of Composite Roofs

Composite roofs involve the combination of different materials, such as wood, metal, or synthetic materials, to create a single, integrated roof structure. These roofs offer a range of advantages, including enhanced durability, aesthetic appeal, and improved performance.

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Applications of Composite Roofs

  1. Residential Buildings: Composite roofs are commonly used in residential buildings, providing an opportunity to customize and create unique designs. They offer versatility in terms of color, texture, and architectural style, complementing various architectural designs.

  2. Commercial Buildings: Composite roofs are also popular in commercial buildings, including offices, retail spaces, and public facilities. Their durability and aesthetic appeal make them suitable for showcasing corporate branding and creating visually appealing exteriors.

  3. Historical Restoration: When restoring historical buildings, composite roofs can replicate the original design while incorporating modern materials and techniques to improve durability and longevity.

Pitched Roofs

Definition of Pitched Roofs

Pitched roofs, also known as sloped roofs, are characterized by their steep angles. They are the most common type of roof found in residential and traditional architecture, offering several advantages and considerations.

Advantages and Disadvantages of Pitched Roofs


  • Aesthetics: Pitched roofs add architectural interest and offer a classic and timeless appearance, enhancing the overall visual appeal of a building.
  • Improved Water Drainage: The steep slope of pitched roofs allows rainwater to quickly drain away, reducing the risk of leaks and water damage.
  • Increased Attic Space: The angled design of pitched roofs creates additional usable space within the attic, offering potential for storage or living areas.


  • Construction Complexity: Building a pitched roof requires more advanced construction techniques and skilled labor compared to flat roofs.
  • Higher Cost: The additional materials and labor required for a pitched roof often result in higher upfront costs compared to flat roofs.
  • Maintenance Challenges: Due to their sloped design, pitched roofs can be more challenging to access for maintenance and repairs.

Terraced Roofs

Definition of Terraced Roofs

Terraced roofs, also known as rooftop terraces or rooftop gardens, refer to the utilization of roof spaces as outdoor living areas. These roofs are designed to provide functional outdoor spaces that can be enjoyed by building occupants or residents.

Design Considerations for Terraced Roofs

When designing terraced roofs, the following considerations should be taken into account:

  1. Structural Capacity: The roof’s structural capacity must be evaluated to determine its ability to support the weight of additional features, such as seating areas, gardens, or water features.

  2. Waterproofing: Proper waterproofing is crucial to prevent leaks and water damage. Waterproof membranes and drainage systems should be incorporated into the design to ensure proper water management.

  3. Access and Safety: Safe and convenient access to the terraced roof is essential. Staircases, elevators, or ramps should be provided to allow easy movement between different levels.

  4. Landscaping and Greenery: Landscaping and the integration of greenery are essential for creating an inviting and visually appealing terraced roof. Consideration should be given to plant selection, irrigation systems, and maintenance requirements.

  5. Amenities and Furniture: Depending on the intended use, amenities such as seating areas, outdoor kitchens, or shaded structures should be included to enhance the usability and comfort of the terraced roof.

In conclusion, the presence of multiple roofs within a building or complex brings various benefits and design considerations. Whether it’s the architectural intricacy of complex roof structures, the versatility of multilevel roofs, or the environmental sustainability of green roofing systems, each type of roof provides unique advantages and challenges. By understanding the different types of roofs, their components, and design considerations, architects, builders, and homeowners can make informed decisions when it comes to creating functional, aesthetically pleasing, and durable roof structures.