Gambrel Roof Cabin Plans with Step-by-Step Instructions

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A tranquil snowy landscape featuring a wooden cabin and a frosty forest in winter.
Credit: pexels.com, A tranquil snowy landscape featuring a wooden cabin and a frosty forest in winter.

Gambrel roof cabin plans are a great choice for building a cozy and functional cabin. This style of roof is characterized by two slopes on each side, with the lower slope being steeper than the upper slope.

The gambrel roof style is well-suited for cabin construction because it allows for more interior space and better ventilation. In fact, a gambrel roof can provide up to 30% more interior space than a traditional gable roof.

To get started with building a gambrel roof cabin, you'll need to choose a plan that suits your needs and skill level. A simple gambrel roof cabin plan can be a great option for beginners, while a more complex plan may be better suited for experienced builders.

A typical gambrel roof cabin plan will include a combination of materials, such as wood and metal, and will require a certain amount of labor and expertise to complete.

Preparation

Before starting your gambrel roof cabin project, it's essential to prepare the site and gather necessary materials. A typical gambrel roof cabin requires a relatively flat area of land with good drainage.

Credit: youtube.com, How to build Gambrel Trusses | Barn Style Rafters | Shed Build Part 3

The ideal location for a gambrel roof cabin is on a slope of 2-5% to prevent water from accumulating around the foundation. This will also help to reduce the risk of foundation damage.

You'll need to clear the land of any debris, trees, or other obstacles to create a smooth building surface. A 10x20 feet area is a good size to start with, depending on the size of your cabin.

Gather all the necessary materials, including lumber, roofing materials, and tools, to avoid last-minute trips to the hardware store. A detailed materials list is crucial to avoid costly mistakes.

Make sure to check local building codes and regulations before commencing your project. A 12-foot wide doorway is a good starting point for a gambrel roof cabin, providing ample space for entry and exit.

Ensure you have a solid plan in place, including a detailed budget and timeline, to avoid project delays and cost overruns. A well-prepared plan will help you stay on track and enjoy the process of building your cabin.

Framing

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Framing is a crucial step in building your gambrel roof cabin. You'll need to pre-cut all the pieces before assembling the side walls to save time, and make sure to be accurate with your cuts to ensure they fit together properly.

To assemble the side walls, start by pre-assembling the "H" shaped areas before fitting them into the wall. These areas have a double board with the top board 3 1/2" shorter on either side than the other board. Check squareness by measuring the diagonals and assemble the double top board last.

You'll need the following materials for the side walls: 26 - 7'6" 2x4, 8 - 6'8" 2x4, 4 - 4'3" 2x4, 12 - 6 1/2" 2x4, 4 - 2'3 1/2" 2x4, 2 - 15'5" 2x4, 4 - 16' 2x4, 4 - 2'6 1/2" 4x4, and 1/2" plywood scraps.

To attach the walls, line them up with the sides of the floor and attach the base plates to the floor using 3 1/2” screws every 6” in a staggered pattern. Screw the walls to each other at the corners using 3 1/2” screws every 8” in a staggered pattern.

Wall Framing Assembly

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Wall Framing Assembly is a crucial step in the framing process, and it's essential to get it right. You'll need to attach the walls to each other and to the floor, using screws to secure them in place.

To start, line up the side walls with the sides of the floor and attach the base plates to the floor using 3 1/2” screws every 6” in a staggered pattern. This will provide a solid foundation for the walls.

The side walls are the same, so you can pre-cut all the pieces before assembling them. This will save you time and effort in the long run. Be sure to be accurate with your cuts, or the walls won't fit together properly.

As you assemble the side walls, you'll notice that they have two "H" shaped areas that need to be pre-assembled before fitting them into the wall. These areas are crucial for providing enough room for the screws.

Credit: youtube.com, Wall Framing Connections and Corners - A Lesson from our Framing course - TEACH Construction

To attach the walls to each other, screw them together at the corners using 3 1/2” screws every 8” in a staggered pattern. At the top corners of the walls, where the top boards overlap, screw each corner together with a pair of 3” screws.

Here's a list of materials you'll need for the wall framing assembly:

  • 26 - 7'6" 2x4
  • 8 - 6'8" 2x4
  • 4 - 4'3" 2x4
  • 12 - 6 1/2" 2x4
  • 4 - 2'3 1/2" 2x4
  • 2 - 15'5" 2x4
  • 4 - 16' 2x4
  • 4 - 2'6 1/2" 4x4
  • 1/2" plywood scraps

Remember to hold the walls vertical as you screw them in, to ensure they're securely attached and evenly spaced.

Cut the Beams

Cutting the beams is a crucial step in framing a gambrel roof. To cut the rafter beams for the roof arches, use a miter saw to cut one end of a 2x4 at a 67.5 degree angle.

For a 2x4, set the saw to 22.5 degrees to achieve the correct angle. This will help create the roof arches.

Cut 60 beams this way, using 10' 2x4s to get 2 pieces out of each board. This will save you lumber and make the process more efficient.

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When adding loft beams to the roof arches, cut the ends of 9 12' 2x6s at 67.5 degree angles. This will create the support beams for the loft floor.

Cut off as little of each end as possible to make the angles, and use 2 3" screws through the end of each 2x6 to secure the beams to the roof arches.

Enhanced Protection

A gambrel roof offers better protection from weather events compared to other roof types, thanks to its steeper slopes on each side of the roof design. This design provides a more efficient way to shed water and snow.

The steeper slopes also help to reduce the weight on the roof's structure, allowing it to withstand heavy snowfall and strong winds. This makes gambrel roofs a great choice for areas prone to harsh weather conditions.

Roofing

A gambrel roof is a popular choice for a shed, and it's also a great option for a cabin. It gives the structure an interesting look while still providing ample protection from the elements.

Credit: youtube.com, Easy Method For Calculating Rafter Lengths In Gambrel Roof

To start building your gambrel roof, you'll need to ensure that your foundation is strong enough to support any additional weight. You should also consider insulation requirements and ventilation needs depending on your climate and the use of the cabin.

First, you'll need to install the roof sheathing, which should be 15/32" sheathing plywood. Screw or nail the panels in with 1 5/8" screws or sheathing nails, making sure to center the vertical seams on roof arches.

Make Gussets

To make gussets for the roof arches, you'll need to start with a 4'x8' sheet of 3/4" plywood. Mark every 11 1/4" on the short sides of the sheet.

You'll also need to mark every few feet in the middle of the sheet. Use a straightedge to draw parallel lines between the marks. A 48" drywall square works very well for this.

Next, mark every 9 1/4" along all of the lines you just made, and along the long edges of the sheet. You'll need to draw lines perpendicular to the first set of lines, which extend 3 3/4" out from each side of the line.

Credit: youtube.com, How to cut gussets for gambrel roof for 10x12 shed FAST using a miter saw

To cut out the gussets, start by cutting along the longest lines first with a circular saw. Then cut the short perpendiculars, and finally the zigzags. Be careful not to over-cut with the circular saw, as it will weaken the gussets.

You'll need to use a jigsaw or handsaw to finish each cut. And, you'll need 84 gussets in total.

Make the Ends

To make the ends of your roof, you'll need to cut 8 more rafter beams, each 61" long. This will give you the extra support needed for the roof's edges.

Cut 28 pieces of 2x4 blocking, each 9" long, as these will help secure the roof's structure. You'll need these for the roof arches.

Assemble 4 more roof arches using the 8 longer pieces for the ends and 8 normal pieces for the peaks in the centers. This will create the foundation for the roof's edges.

Screw the 2x4 blocking into 2 of the arches, using 2 3" screws per piece, to secure them in place. Make sure to drill pilot holes to prevent the blocking from splitting.

There should be 4 pieces of blocking on each of the long sections and 3 pieces on each of the short sections. This will provide the necessary support for the roof's structure.

Add the Sheathing

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You'll need 15/32" sheathing plywood for this step, which is a standard thickness for roof sheathing.

Cut the panels to fit your roof, making sure to center the vertical seams on roof arches.

To do this, set the depth of your circular saw blade to just barely deeper than the plywood, then cut the panels to fit in place after marking your center line with a drywall square.

Use 1 5/8" screws or sheathing nails to secure the panels to the roof.

Install Roofing Components

Start by nailing drip edge on the bottom edges of the roof, every foot or so. This helps to protect the roof from water damage and ensures a watertight seal.

Drip edge is typically installed on the sides of the roof as well, starting from the bottom up and overlapping pieces by about 6 inches. This helps to prevent water from seeping under the shingles.

Flex flashing is used to cover the nail heads and seal the drip edge to the roof. You may need to use some 3M spray adhesive to help the flex flashing stick to the wood.

Credit: youtube.com, Roofing Underlayments EXPLAINED by a roofer: Tar Paper, Synthetic, Ice and Water Shield

Synthetic underlayment, such as feltbuster, is rolled out to cover both sections of both sides of the roof, working from the bottom up. This provides an additional layer of protection against water damage.

Cap nails or cap staples are used to secure the underlayment to the roof, making sure it's tightly fastened and watertight.

Starter course is rolled out and nailed every 6 inches, about 2 inches back from the outer edge. This helps to create a solid foundation for the shingles.

Shingles are installed in the same way as the starter course, with 4 nails per shingle unless you live in a high wind area.

Triangles and Doglegs

We made our plywood brackets, which we called "triangles" and "doglegs", to attach to the roof trusses. These brackets were cut from 1/2-inch plywood using cardboard templates.

To make the templates, we traced the outlines of the truss joints onto pieces of cardboard and cut them out with scissors. We then used the templates to saw the brackets out of the plywood.

The triangles and doglegs were attached to the trusses with 8-penny nails, and all joints were tied together with strap metal, which is often used to bind bundles of lumber.

Loft and Interior

Credit: youtube.com, 16 x 16 Shed Plans Build - Gambrel Shed Design

The loft area above the front porch is a great space to store large objects, keeping the main floor tidy and organized. You can use it to store anything from seasonal decorations to outdoor equipment.

To make the most of this space, you can span the loft floor across the first 8 roof arches, and add an extra beam for the other end of the roof, totaling 9 beams. Cut the ends of these beams at 67.5 degree angles to make them look like big rafter beams.

The loft floor itself can be made from scraps and extra material from the roof sheathing, secured with 1 5/8" screws. This will give you a sturdy and functional space for storage or even as an extra sleeping area.

Build Subfloor

To build a sturdy subfloor, start by laying out 4 16' 4x4s on the ground, leaving 3' 6" of space between them.

The subfloor is composed of 13 11'9" 2x6s for the joists and 2 16' 2x6s for the sides, which need to be assembled on top of the skids and then screwed together with 3 1/2" screws.

Credit: youtube.com, How to Lay Subflooring | This Old House

Each 2x6 has 14 1/2" of space between them, except for the first and last spaces, which are 13 3/4" to minimize cutting or waste.

To ensure the subfloor is square, regularly measure the diagonals and adjust as needed.

Before building the rest of the shed, it's essential to level the subfloor by placing blocks of pressure-treated wood scrap under the 4x4 skids in at least 4 places along each skid.

Use a long, straight board to extend your level for accurate measurements.

Interior Loft Area

The interior loft area is a fantastic feature of a gambrel roof design. It's essentially a large, open space above the front porch that's perfect for storing large objects.

You can keep the main floor tidy and organized while still having a place to stash your stuff. In fact, it could even be an extra sleeping area if you choose to finish out the interior and make it a living space.

Credit: youtube.com, 30+ Loft Apartment (Small Spaces) Interior Design Ideas

The loft floor can be made out of scraps and extra materials from the roof sheathing, which is a great way to repurpose materials and save some money. To secure the loft floor, use 1 5/8" screws.

One of the biggest advantages of a gambrel roof is its extra space on the upper floor or attic level, which can be used for storage or as an additional living space. This design feature is a game-changer for anyone who needs more room in their home.

To add a finishing touch to your loft area, consider adding support beams, which are required for a gambrel roof. However, keep in mind that these beams may limit your design options and impact the overall appearance of your home.

The beams for the loft area can be cut from 12' 2x6s, with the ends cut at 67.5 degree angles. This will make them look like big rafter beams, adding to the charm of your loft area.

Build Doors and Windows

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To build the doors, cut two pieces of T1-11 siding to the desired size. Cut the doors out of these pieces, making sure to frame the backs with 2x4s.

The doors should be cut to fit the door frame, and the frame should be built to match the image shown.

For the windows, cut four squares out of scrap T1-11 siding. The windows should be 27" squares, but can be trimmed to fit the window frames if necessary.

Frame the windows with 2x3s, following the image provided.

Layout and Cutting

First, mark the locations of the four rafters in each truss on the ground using stakes.

To ensure accurate measurements, make a full-size layout of your gambrel on smooth, level ground.

Using a string line, mark the correct lengths and angles to cut the 2-by-6 beams.

Cut the pieces of the first truss to length, and then use these original 2-by-6's as patterns to mark and cut the rafters for the remaining trusses.

Credit: youtube.com, How to Build Stairs | A simple way to mark and cut stringers

Cut 60 beams at a 67.5 degree angle, with one end cut at 22.5 degrees using a miter saw.

Measure 55 inches from the tip of the cut end, and cut the other end at 67.5 degrees in the opposite direction to create the rafter beams.

Use 10' 2x4s to get 2 pieces out of each board, making the most of your materials.

Design and Planning

A gambrel roof cabin plan sounds like a great idea, but before you start building, you need to design and plan it carefully. A gambrel roof is an excellent choice for a cabin, particularly in areas with a coastal climate.

The most common type of gambrel roof features two sides that slope down at different angles, with a flat top and gable roof ends. This creates an angled shape that looks similar to a barn’s roof.

To create a gambrel roof design, you can start by making scale drawings of several different combinations of side slopes. In the end, you'll want to settle on a roof plan that looks good, makes efficient use of materials, and allows for porch and eave overhangs.

You can use plywood straps to connect the pieces of each truss together, giving your roofing trusses adequate rigidity. This is a great way to add stability to your roof without using too many materials.

Types of Roof Styles

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A gambrel roof is a great choice for any home, particularly in Florida where the coastal climate demands a durable and attractive roof design.

Gambrel roofs feature two sides that slope down at different angles, with a flat top and gable roof ends, creating an angled shape that looks similar to a barn's roof.

This type of roof is often used in barns and sheds, but it can also be used to create an attractive design element for any home.

A gambrel roof dormer can be added for extra headroom or to create an eye-catching contrast in the overall design.

Gambrel roof trusses provide structural support and help ensure that the roof deck remains stable.

The trusses of the gambrel roof also help to give the roof its unique shape and style, allowing you to create a unique look for your home.

A gambrel roof requires more maintenance than other roofs, so you'll need to pay close attention to the condition of your gambrel roof trusses and make sure they are properly maintained over time.

You can choose from different colors and materials, such as shingles or metal, for a unique aesthetic that fits your style.

Pros and Cons

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A gambrel roof can provide increased space, but it also requires additional support beams.

Gambrel roofs come with a high cost, often making them a significant investment for homeowners.

The extra space offered by a gambrel roof is a major advantage, allowing for more storage or living areas.

However, the increased maintenance of a gambrel roof can be a drawback, requiring more frequent repairs and upkeep.

The protection against the weather that a gambrel roof offers is a significant benefit, keeping your home safe and dry.

But, the high cost and increased maintenance of a gambrel roof may not be worth it for some homeowners.

Research and Planning

Research and planning are key to a successful project. A good starting point is to make scale drawings of different design options, like the gambrel roof designs the author created.

The author's initial plan was to make a dozen or so gambrel-shaped frames or trusses out of 2-by-6 lumber. This shows the importance of having a clear plan before starting a project.

Credit: youtube.com, DESIGN AND PLANNING PHASE | PHASES OF RESEARCH | PHASE 2 | VOLUME 1 | SPIDER | SCPT

Plywood straps can be a useful solution for connecting pieces of a truss together, as the author discovered. These straps are essentially wooden brackets nailed to the sides of two connecting beams to hold them together.

The author and Jim sat down to make scale drawings of several gambrel roof designs, each with a different combination of side slopes. This collaborative effort helped them settle on a roof plan that was both aesthetically pleasing and efficient in material use.

Frequently Asked Questions

What are three disadvantages of a gambrel roof?

A gambrel roof's open design makes it more prone to collapse, and it's not ideal for areas with heavy snow and rainfall due to buckling pressure. Additionally, its design can make it more susceptible to structural damage from extreme weather conditions.

How much does it cost to build a gambrel roof?

The cost to build a gambrel roof typically ranges from $7,271 to $79,931, with an average cost of $21,369. Installation costs can vary depending on factors such as size, materials, and location.

How far can you span a gambrel roof?

A Gambrel roof can span up to 48 feet, accommodating a wide range of building sizes and styles. Typical spans range from 24 to 48 feet, making it a versatile option for various architectural needs.

What is the best angle for a gambrel roof?

For a standard gambrel roof, the ideal peak angle is 30 degrees, paired with a second slope at 60 degrees. This unique combination creates a balanced and aesthetically pleasing design.

Amy Martin

Senior Writer

Amy Martin is a seasoned writer with over a decade of experience in various industries. She has a passion for creativity and enjoys exploring different perspectives on life. Amy's work often inspires readers to think outside the box and embrace new ideas.

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