What are Gambrel Roofs: Everything you Need to Know

Have you ever looked at a building and wondered about the unique shape of its roof? That’s likely a gambrel roof, and you’re not alone in being curious about it. The gambrel roof is a classic component that can be found on a barn, a quaint hamlet, or even a modern house. But what exactly makes it stand out, and why are so many people choosing it for their homes?

In this blog, we’ll discuss everything you need to know about gambrel roofs. From the basics of what they are to the materials and design options, we’ll cover it all. We’ll explore the benefits and limitations of these roofs and help you understand how they compare to other types of roofing. Plus, we’ll share expert tips on installation, maintenance, and choosing the right professional for the job.

Quick View of Key Information

• Gambrel roof design: Features two slopes on each side, with a steep lower slope and a shallow upper slope.
• Maximized attic space: Provides extra usable space in the attic for storage or additional rooms.
• Materials used: Commonly built with wood, asphalt shingles, metal, and slate.
• Durability: Lasts 20 to 50 years with proper care and quality materials.
• Installation costs: Typically higher due to the complexity of the design and the need for skilled labor.
• Trusses: Pre-engineered trusses reduce construction time and costs.
• Popular use: Ideal for barns, farmhouses, and homes that require additional attic space.
• Weather resistance: Performs well in heavy snow or rain but may need reinforcements for high winds.
• Energy Efficiency: Extra attic space enhances insulation and reduces energy costs.
• Maintenance: Regular cleaning, leak checks, and proper ventilation are crucial.

What Are Gambrel Roofs?

A gambrel roof is a two-sided roof with two slopes on each side, typically featuring a triangular shape. The lower slope is steep, while the upper slope is shallow, which gives the roof its unique look. Commonly seen on barns and older homes, this style maximizes the attic space. Gambrel roofs offer both charm and practicality. It makes them a popular choice for various types of buildings.

What Materials and Components Are Used for Gambrel Roofs?

Here are six essential materials and components used in constructing gambrel roofs:

• Wood: Wood is commonly used for the framework of gambrel roofs. It is strong, easily available, and can be shaped to fit the roof’s unique design. Wood framing provides flexibility for modifications and is cost-effective.
• Steel or Metal: Steel or metal framing offers more durability than wood, which makes it ideal for long-lasting construction. It resists rot and pests, which can be a concern with wooden frames. Metal also provides structural support for heavier roofing materials.
• Roofing Felt or Underlayment: Roofing felt or underlayment acts as a protective barrier between the roof decking and shingles. It prevents water from seeping into the roof. It also adds an extra layer of protection against leaks. This material is crucial for ensuring the roof structure’s longevity.
• Asphalt Shingles: Asphalt shingles are one of the most common materials used for covering gambrel roofs. They are affordable, easy to install, and available in a variety of colors. Asphalt shingles also offer durability and effective protection against the elements.
• Purlins: Purlins are horizontal beams placed between the rafters to support the roofing material. They help spread the weight of the roof evenly and prevent the structure from shifting. Purlins ensure that the roof remains stable over time.
• Collar Ties: Collar ties are horizontal beams installed across the rafters to prevent the roof from spreading apart. These ties provide additional stability to the structure. They are particularly important for maintaining the shape and integrity of the gambrel roof over the years.

Types of Gambrel Roof

Gambrel roofs come in several variations, each with its own style and advantages. Choosing the right type depends on factors such as space requirements, aesthetic preferences, and environmental conditions. Below are five common types of gambrel roofs, each offering something unique.

Traditional Gambrel Roof

• Description: The classic gambrel roof features a steep lower slope and a shallower upper slope. It’s often seen on barns and homes with a rustic or colonial design.
• Advantages:
  • Maximizes attic or upper-floor space
  • Offers a classic, timeless look
  • Good drainage from rain and snow
  • Relatively simple to construct
• Features:
  • Symmetrical design
  • Steep lower slope for additional space
  • Simple framing system
  • Ideal for barns or homes looking for a traditional appearance
• Ideal For:
  • Rural homes
  • Barn-style buildings
  • Houses looking for extra attic space

Dutch Gambrel Roof

• Description: The Dutch gambrel roof is similar to the traditional design but includes dormers for more headroom and light in the attic space.
• Advantages:
  • Increases living space in the attic
  • Dormers provide additional windows for natural light.
  • Ideal for small homes that need more room
  • Offers a distinctive, charming appearance
• Features:
  • Includes dormers for extra space
  • Steep lower slope and shallow upper slope
  • Provides a more “homey” feel
  • Ideal for buildings needing extra room without expanding the footprint
• Ideal For:
  • Small residential homes
  • Homes in need of more attic space
  • Those looking for a unique design

Modified Gambrel Roof

• Description: The modified gambrel roof features variations to the classic design, often with flatter slopes or unique angles to match modern architectural styles.
• Advantages:
  • Customizable to fit various architectural styles
  • More stable in high winds
  • Efficient for energy savings when paired with insulation
  • Can blend with both modern and traditional home designs
• Features:
  • Flatter upper slopes
  • More modern, sleek design
  • Easier to incorporate into contemporary homes
  • Suitable for homes in urban areas
• Ideal For:
  • Modern homes
  • Those wanting a unique, custom design
  • People in areas with high wind or extreme weather conditions

Single Gambrel Roof

• Description: The single gambrel roof features just one sloping side. This version is often used for smaller structures or as part of a larger roof system.
• Advantages:
  • Simplifies construction
  • Reduces overall roofing costs
  • Still provides some attic space.
  • Works well on smaller buildings
• Features:
  • Only one side of the roof has the gambrel design.
  • More affordable and easier to build
  • Still allows for some extra space inside.
  • Less complex than the traditional two-sided gambrel roof
• Ideal For:
  • Sheds or small homes
  • Outbuildings or garages
  • Those seeking an economical roof option

Curved Gambrel Roof

• Description: This type of gambrel roof has smooth, curved lines rather than the sharp angles of a traditional design. It combines the benefits of a gambrel roof with an aesthetically pleasing, flowing look.
• Advantages:
  • Adds a unique architectural touch
  • Provides better wind resistance
  • Great for areas prone to extreme weather
  • Offers additional space in the attic area
• Features:
  • Smooth, curved lines
  • More modern aesthetic
  • Offers a softer look compared to traditional gambrels
  • Typically, more resistant to wind stress
• Ideal For:
  • Modern homes
  • Buildings in windy areas
  • Those seeking an elegant and unconventional design

Different Designs of Gambrel Roofs

Gambrel roofs come in various designs to suit different building styles and personal preferences. Each design offers its own unique charm while maintaining the same general gambrel structure. Here are five different designs you might encounter.

• Symmetrical Gambrel Roof: This is the classic and most common design, characterized by identical shapes and slopes on both sides of the roof. It provides a balanced look that works well in both residential and agricultural buildings.
• Asymmetrical Gambrel Roof: In this design, one side of the roof is steeper than the other. This type of roof often adds a distinctive look. This design makes the building stand out while still retaining the functional benefits of a gambrel roof.
• Gambrel with Dormers: A gambrel roof with dormers adds extra vertical space to the attic, which makes it usable living space. This design is ideal for creating light-filled spaces while maintaining the classic gambrel shape.
• Double Gambrel Roof: A double gambrel roof features two overlapping gambrel roofs, one placed on top of the other. This type of design is typically used for larger buildings or homes with multiple levels of space.
• Mansard Gambrel Roof: This variation features a gambrel roof with an even steeper upper slope, often used to create more space or add a dramatic flair. It’s particularly popular in French architecture and high-end homes.

Gambrel Roof House Plan

A gambrel roof house plan offers the advantage of extra space while maintaining a beautiful aesthetic. Here are five types of house plans that incorporate this roof style, each offering unique features.

• Traditional Colonial Style: This plan combines the classic gambrel roof with the elegance of Colonial-style architecture. The steep slopes create ample upper-floor space, making it great for large families or those who need additional living areas.
• Barn-Style Home: A gambrel roof house plan inspired by barns offers a rustic charm and functional layout. The design maximizes space in both the attic and the living area, perfect for those looking for a spacious yet cozy home.
• Dutch Colonial Revival: This house plan has a gambrel roof with dormers, which lets in more natural light and air. The design is especially popular in suburban areas where traditional homes blend with modern amenities.
• Modern Gambrel House: With a modified gambrel roof design, this plan offers a sleek and contemporary twist on the classic gambrel style. It usually has big windows and open floor layouts, which makes it great for people who desire a more modern, open look.
• Lakefront or Vacation Home: A gambrel roof house plan is ideal for lakefront or vacation homes, where the high slopes of the roof provide extra storage space. The unique design also adds a charming, rustic touch to a peaceful getaway.

What are Gambrel Roof Trusses?

Gambrel roof trusses are prefabricated, engineered components used to support the structure of a gambrel roof. These trusses are designed to handle the roof’s unique shape and weight distribution, ensuring stability and durability. Using trusses can expedite construction and lower labor costs compared to traditional framing methods. Below are some common types of gambrel roof trusses you might encounter:

• 30-Foot Gambrel Roof Trusses: These trusses are designed for larger buildings and provide durable support to massive roofs. They are ideal for barns, warehouses, or homes with wider roof spans. The design ensures that the roof remains stable while offering ample space beneath it.
• 12-Foot-Wide Gambrel Roof Trusses: These trusses are typically used for smaller buildings or residential homes. They can hold up roofs that are up to 12 feet wide, which makes them a good choice for buildings of medium size. Their compact design makes them easy to install without compromising strength.
• 20-Foot Gambrel Roof Trusses: Trusses with a 20-foot span are perfect for medium-sized homes or outbuildings. These provide a good balance between size and structural stability, which makes them durable and long-lasting. Their design provides ample attic space while maintaining the overall structural integrity.
• 14-Foot-Wide Gambrel Roof Trusses
  These trusses are suitable for homes or structures with a 14-foot roof span. They help support the roof while providing more headroom in the attic. These trusses are a popular choice for small barns or sheds that require additional height and stability.
• 16-Foot Gambrel Roof Trusses
  Designed for buildings with a 16-foot roof span, these trusses provide additional attic space while supporting heavier roofing materials. They are ideal for residential homes or large storage buildings that require additional space without compromising on strength. Their design maximizes vertical space and provides a balanced look for the structure.

Gambrel Roof Framing

Gambrel roof framing is the process of constructing the roof’s skeleton using rafters, beams, and support systems. It requires careful planning to ensure the roof’s unique double-sloped design is stable. The framing involves attaching the rafters to the ridge beam and ensuring the roof structure is reinforced with purlins and collar ties. Proper framing is crucial for supporting the roof and distributing weight evenly.

What is Gambrel Roof Pitch?

A gambrel roof pitch refers to the angle or slope of the roof’s two sides, which are typically symmetrical but with different steepness.

In a gambrel roof, there are usually two slopes on each side:

• The upper slope is steeper, often with a higher pitch.
• The lower slope is much gentler and shallower.

The pitch itself is defined as the ratio of the vertical rise of the roof to the horizontal run. It’s often expressed as a ratio (e.g., 6:12, 8:12) or in degrees (e.g., 30°, 45°).

For example:

• A 6:12 pitch means that for every 12 horizontal inches, the roof rises 6 inches.
• An 8:12 pitch would rise 8 inches for every 12 horizontal inches.

In a gambrel roof, the upper part of the roof (the steeper slope) often has a pitch around 8:12 or 9:12, and the lower slope is shallower, like 4:12 or 5:12. These variations can give the gambrel roof its distinct appearance with a more dramatic, barn-like profile.

How to Shingle a Gambrel Roof

Shingling a gambrel roof can be a bit tricky due to its steep and shallow slopes, but it’s totally doable with the right steps. Here’s a simple guide to help you get started:

• Step 1: Prepare the Roof Deck
  Ensure the roof deck is clean and dry. Lay down roofing felt or underlayment to create a moisture barrier.
• Step 2: Install Starter Shingles
  Start at the eaves and install a row of starter shingles, which ensures they overhang slightly. This helps direct water away from the roof and prevents leaks.
• Step 3: Lay the First Row of Shingles
  Start with the first row of shingles at the base of the roof. Align and nail them securely.
• Step 4: Continue Installing Shingles Row by Row
  Avoid gaps by slightly crossing each row of shingles as you climb the roof. Be sure to stagger the joints between each row for added strength and water resistance.
• Step 5: Install Shingles on the Upper Slope
  Once you’ve finished the lower slope, move to the upper slope of the gambrel roof. Install shingles in the same manner, ensuring they are aligned carefully.
• Step 6: Finish the Roof Edges and Valleys
  Pay special attention to the edges and valleys of the roof. Install flashing and ensure shingles are cut to fit snugly along the roof’s edges.
• Step 7: Inspect the Roof
  After installation, inspect the roof to ensure everything is secure. Inspect for any gaps or loose shingles and make necessary repairs.

What Are the Benefits and Limitations of a Gambrel Roof?

A gambrel roof has both advantages and challenges. Let’s break down the benefits and limitations side by side to help you decide if it’s the right choice for your building.

How to Install a Gambrel Roof

A gambrel roof installation is a rewarding project that enhances both the functionality and aesthetics of your building. Here’s a step-by-step guide to help you through the process:

1. Prepare the Site

• Clear the area: Remove any trash or obstacles from the construction site.
• Set up scaffolding: Ensure safe access to the roof for workers.
• Gather materials: Ensure you have all necessary materials and tools on hand before beginning.

2. Install the Ridge Beam

• Position the ridge beam: Place it at the peak of the roof to serve as the main support.
• Secure the beam: Use appropriate fasteners to ensure it’s firmly in place.
• Check alignment: Ensure the beam is level and properly aligned with the building.

3. Place the End Wall Plates

• Measure and cut: Cut the wall plates to the required length.
• Install the plates: Secure them at each end of the ridge beam.
• Ensure level: Use a level to make sure the plates are perfectly horizontal.

4. Install the Gambrel Trusses

• Position trusses: Place the trusses at the specified intervals along the ridge beam.
• Secure trusses: Fasten each truss to the ridge beam and wall plates.
• Check alignment: Ensure all trusses are aligned and spaced correctly.

5. Add Purlins and Collar Ties

• Install purlins: Place horizontal purlins between the trusses for added support.
• Add collar ties: Install collar ties to prevent the roof from spreading.
• Secure all components: Ensure all connections are tight and secure.

6. Install Sheathing

• Apply sheathing: Lay plywood or OSB sheets over the trusses.
• Secure sheathing: Fasten the sheets to the trusses with appropriate nails or screws.
• Check for gaps: Ensure there are no gaps between the sheets.

7. Apply Roofing Material

• Install underlayment: Lay roofing felt or synthetic underlayment over the sheathing.
• Apply shingles or metal panels: Install your chosen roofing material, starting from the bottom and working your way up.
• Seal edges: Ensure all edges are sealed to prevent water infiltration.

Pro Tip

Consult with a structural engineer before beginning your project. They can provide valuable insights into load requirements and ensure your design complies with local building codes.

Challenges to Keep in Mind When Installing a Gambrel Roof

• Complex geometry: The unique angles can make framing and sheathing more challenging.
• Structural load: Properly distributing weight is crucial to prevent sagging.
• Weather conditions: Adverse weather can delay construction and affect material integrity.
• Permitting: Navigating local building codes and obtaining necessary permits can be time-consuming.

How Much Does a Gambrel Roof Installation Cost (per sq. ft.) for Brooklyn, NYC?

The following table provides an estimate of the installation costs for a gambrel roof, including material and labor expenses. Please note that these prices may vary depending on factors such as the complexity of the design, the roofing materials used, and the contractor’s rates.

Spotlight Examples of Gambrel Roofs

Gambrel roofs are a classic choice for both traditional and modern designs. They offer charm, extra space, and a distinctive look. Here are a few standout examples of gambrel roofs that showcase their versatility and beauty:

• Dutch Colonial Homes: These homes often feature gambrel roofs with dormers, which give them a stately and traditional appearance.
• Barns and Farmhouses: The iconic gambrel roof is a hallmark of barns, providing ample storage space and rustic charm.
• Modern Gambrel Residences: Some contemporary homes incorporate gambrel roofs, which blend traditional style with modern materials for a unique aesthetic.
• Storage Buildings and Sheds: Gambrel roofs work well on outbuildings like garages, which offer extra headroom when needed.
• Cottages and Cabins: Gambrel roofs are ideal for small vacation homes, which maximize attic space and provide a cozy, rustic feel.

Gambrel Roof vs. Other Roofing Types

When selecting a roof for your home or building, it’s essential to consider the advantages and disadvantages of various types. Here’s how a gambrel roof compares to five other popular roofing styles based on key factors:

How Long Does a Gambrel Roof Last?

A gambrel roof can last anywhere from 20 to 50 years. It depends on the materials used and the care it receives. High-quality materials, such as metal or slate, can extend its lifespan. Regular maintenance, such as cleaning and inspecting for damage, also plays a key role in longevity. If well-maintained, a gambrel roof can last well beyond the average expectancy.

Expert Tips for the Care and Maintenance of Gambrel Roofs

• Inspect your roof regularly for damage, especially after heavy storms.
• Clean the roof to remove debris like leaves, twigs, and dirt that can cause water buildup.
• Check for leaks in valleys, joints, and around chimneys or vents.
• Trim overhanging branches to prevent them from damaging the roof or clogging gutters.
• Ensure proper ventilation in the attic to avoid moisture buildup and ice dams.
• Re-seal shingles or roofing material when they begin to show signs of wear or aging.

Why should you choose a professional roofing contractor?

Are you looking for an expert roofing contractor in Brooklyn, NYC? SR General Construction has you covered! Our business is located at 8807 Avenue B, Brooklyn, NY 11236, United States, in the Canarsie area.

We proudly serve all areas of Brooklyn with high-quality, durable roofing solutions. From new installations to repairs and maintenance, we provide the best service at affordable prices. Contact us and experience why we’re Brooklyn’s roofing experts!

FAQ

1. What is a gambrel roof?

A gambrel roof is a two-sided roof with two slopes on each side. The upper slope is shallow, while the lower slope is steep, creating a barn-like appearance.

2. Why is it called a gambrel roof?

The term “gambrel” originates from the Medieval Latin word “gamba,” meaning horse’s hock or leg, due to the roof’s resemblance to the shape of a horse’s hind leg.

3. Are gambrel roofs suitable for Brooklyn’s weather?

Gambrel roofs perform well in areas with heavy rainfall or snow. However, they may require reinforcements in regions prone to high winds.

4. How long does a gambrel roof last?

With proper construction and maintenance, a gambrel roof can last between 20 and 50 years. It depends on the materials used.

5. What materials are used for gambrel roofs?

Common materials include wood, asphalt shingles, metal, and slate. The choice depends on aesthetic preferences and budget.

6. What is the typical pitch for a gambrel roof?

A standard gambrel roof has a lower slope pitch of 29/12 and an upper slope pitch of 5/12. It provides a balanced and symmetrical design.