Gable roof from corrugated board: Specificity of construction + step -by -step overview of technology

A cost-effective and useful option for homeowners wishing to upgrade their property with a long-lasting and weather-resistant roofing choice is to build a gable roof out of corrugated board. This kind of roof is distinguished by its traditional triangular shape, which enhances aesthetic appeal and efficiently sheds snow, rain, and debris.

A number of crucial procedures are involved in the building process to guarantee the stability and longevity of the roof. The installation of strong wooden or metal trusses forms the roof’s framework, starting with the framing. The structural support required to bear the weight of the corrugated board and the weather is provided by these trusses.

The corrugated board sheets are carefully placed over the trusses once the framing is in place. Because of its strong and lightweight characteristics, corrugated board is a popular choice for installation because it provides exceptional resistance to weathering and impact. Because each sheet overlaps the other, a tight seal is ensured and a continuous barrier against moisture is formed.

Underneath the corrugated board, roofing underlayment—such as felt or synthetic materials—is frequently applied to improve insulation and waterproofing. This layer keeps interior spaces warmer in the winter and colder in the summer by enhancing the roof’s thermal efficiency and preventing water infiltration.

In order to improve weather resistance and create a seamless finish, flashing and trim are installed along the roof’s edges and joints. Flashing that has been installed correctly keeps water from leaking into weak spots like valleys and edges, and trim gives the entire design a more finished appearance.

The principle of the installation of a gable roof for a professional

How does a gable roof appear? Maybe to the card house element, which is constructed from two planes stacked one on top of the other and the other on the main support. Slopes can be seen in the context of the plane of the "house" roof. Their measurements and the angle at which they lean toward the building’s exterior walls are typically the same. In this instance, the horse appears to split the house’s overlap in half.

An alternative design option is an asymmetric gable roof. Such a roof is no longer an isosceles triangle when viewed from the sideboard because the slope angles of the slopes are different. Additionally, one outer wall is now the skate line.

Either way, the gable roof’s design is unaltered. Rafts, which can be stacked or hung, serve as her bearing frame. The only walls on which the rafter system hangs are the exterior walls and the internal partition. The option with layered rafters is preferred in terms of reliability.

The "roofing pie," whose filling is determined by whether the attic will be residential (heated) or not, is placed in between the rafters. Roof insulation is necessary for warm attics in residential buildings. If the attic is not meant to be used for residential purposes and is meant to remain cold, insulation is placed beneath the attic (the dwelling’s ceiling), not on top of a roof.

Conventional roof pie layers to cover a profiled sheet:

  • Vapor barrier – a film that completely blocks moisture in any of its manifestations. The main task: prevent a warm steam that rises up from a warm room, into the insulation. The steam -barrier is laid under a layer of thermal insulation, that is, it is sewn on the rafters from the side of the room and is the first layer of the roof pie. Used only in the presence of insulation, when arranging a residential attic (attic).
  • Insulation – thermal insulation material that prevents heat leaks from the dwelling in the cold season. In summer, the insulation, on the contrary, does not allow the room to overheat. In other words, the role of insulation is reduced to blocking heat migration in any direction. For a gable roof, mineral wool is most often used as a heater, which is installed between the rafters of the display.
  • Waterproofing – film or membrane passing steam, but not letting out water. It is used to exclude leaks of atmospheric moisture and accumulation of condensate in the insulation (if any) or on the ceiling of the attic. The hydraulic tank is laid on top of the rafters and is the final layer of the roof pie. Is a mandatory element of the roof, regardless of the presence of a heat insulator.

For a corrugated board gable roof to be insulated, all three layers must be present in the roof pie. Only waterproofing in the cold.

A counterpart and crate are filled and placed on top of the rafters (by waterproofing). In order to allow for ventilation, the counterparty creates a space between the waterproofing film and the professional.

A similar one is constructed from bars that are stacked along their rafters. Regarding the crate, it has already been positioned over the rafters. A rarefied crate of boards or bars is typically used for a profiled sheet. A continuous crate is constructed from assembled black boards (less frequently from plywood or OSP) if the profile used is too thin.

The last step is to mount corrugated board sheets on the crate. Their length ought to be equal to or greater than the slope’s length. This will improve the tightness and dependability of the roof by preventing the coating from forming transverse seams. Styles for sheets with smaller parameters are applied in rows, beginning from below.

Which profile to use for the roof?

The material corrugated board is universal. It is employed in construction for quite different uses, such as face cladding, fence arrangement, and roof covering. Currently, corrugated board types intended for roofing are of interest to us.

Corrugated board comes in three varieties: wall (c), universal (ns), and bearing (n). At first, NS is used as a roofing-wall and the carrier corrugated board is used as roofing. However, not everything is that easy. Actually, depending on the specifications of the roof structure, any one of the three types can be used as roofing material.

You must first find your way around the marking. It has the type’s letter designation on it. The S-18 brand, for instance, indicates a wall profile. The height of the profile (waves) in millimeters is represented by the figure adjacent to the letter. That is to say, the wave height in this instance is 18 mm.

It is permissible to cover small building roofs with wall profiled sheets of the S-18, S-21, and S-22 grades if the rafters are arranged in a step. Although their strength is not great, it is more than enough for the roof that is subjected to light loads.

In all other situations, the NS and N brands of corrugated board should be preferred. The best option for large buildings will be the NS-35 and N-60 sheets, which have rolled grooves along the shelves that act as stiffener ribs. This characteristic improves the material’s strength and capacity to support large loads.

With our in-depth guide, learn how to construct a gable roof out of corrugated board. This article explains the building process in detail while highlighting the special qualities of corrugated metal gable roofs. Everybody can easily follow our clear instructions, which cover everything from planning and material selection to installation techniques. Whether you’re a do-it-yourselfer or a homeowner curious about the ins and outs of this widely used roofing option, our article will provide you with the knowledge you need to finish your project successfully.

The device of the supporting frame (rafter system)

It is safe to refer to the rafter system as the roof frame that supports all other components. One of the most significant features of this frame is the angle that the rafters create with the building’s exterior walls. The SNiP recommends a tilt of 15-20 ° for slopes beneath a profiled sheet’s trim. Still, nobody called off experiments involving increasing steepness! However, the slope can only be lowered by up to 10 ° for residential buildings and only by 8 ° for outbuildings and industrial buildings. We’ll move on to a softer profiled sheet roof. And possibly succumb to snowdrifts during the winter.

The slight weight of profiled sheet as a roofing material is another characteristic. This is a significant benefit that lets you do away with the enormous rafter system. First and foremost, from erecting rafters with regular steps. When using a profiled shelling, the spacing between the rafter legs is between 0.6 and 0.9 meters.

Usually, a beam with a 50×100 mm or 50×150 mm cross section has the rafters cut out of it. When constructing a warm roof, it is best to use larger wood (like 100 by 200 mm) to add a layer of thermal insulation in the intervening space.

The rafters are visible on the support, known as the Mauerlat, a wooden strainer from the beam that is fastened along the top of the building’s exterior walls. Mauerlat serves as the upper binding beam or the upper crown of a log home made of wood.

Laying a roof pie

The internal "filling" of the roof can begin after the rafters have been installed and secured.

The installation of a vapor barrier film is the first step in this process if the design calls for the inclusion of insulation in the structure. Using a construction stapler to secure the bracket, it is sewn on the inside side of the rafters. There is at least a 10 to 15 centimeter overlap between adjacent stripes. The top seams created by the overlap are sealed with a unique mounting tape to guarantee the total tightness of the insulating surface.

On the exterior of the building, the insulation has already been styled. You can use mineral wool, glass wool, epx, or polystyrene as a heater for gable roofs. At least 150–200 mm of thermal insulation covers the entire attic. The rafters are sliced into slightly larger steps by cutting the insulation into strips. This enables you to correct and prevent the formation of cracks by pressing the insulation in between the rafters. Typically, the insulation mats are arranged in rows of multiple layers, with each layer covering the seams of the one before it.

Roll waterproofing rolls with a 10-15 cm overlap in line with cornice overhangs and according to the insulation from above. Construction staplers are used for fixation. Tape is used to adhere the overlaps.

The described sequence of work involves laying the insulation outside the room. But this is not always convenient. Sometimes (for example, if the insulation was decided to carry out after the completion of construction) the laying of the roof pie is performed from the inside of the attic (attic). In this case, before the start of insulation, the roof must be blocked by a combination of a hydraulic tank + professional. After that, being in the attic, the employee can fix the insulation cut into parts in the interspers. And then sheathe it on top with a steam -barrier. Everything is the same as in the first case of insulation, with the exception of the sequence of work.

The roofing pie is even simpler if insulation is not installed and the attic is cold. A profileist is positioned on top of a hydraulic tank that is drawn on the outside rafters, along with a counterpart and crate.

Installation of the counterparty and crate

The ventilation chamber required to remove the water vapor that has penetrated the profiled sheet, lower the temperature underneath it, and remove condensate is formed between the waterproofing film and the sheet. The ventilation chamber’s height ought to be roughly 50 mm. Therefore, to create such a gap, just fill the bars with a 50×50 mm cross section that are the counterparty steamshot along the rafters.

The crate’s components are fastened to a frame, which serves as the counterpart. The crate for it is made sparse or continuous, depending on the brand of profiled sheet and the slope of the slopes.

A more popular choice is a rarefied crate. Boards with a cross section of 50×120 mm or 50×140 mm, or bars with a section of 30×50 mm or 50×50 mm, are used to form it. Pilomaterial is installed overhanging, along the skate, and across the rafters. The brand of profiled sheet determines the crate’s bar. The suggested spacing between the Reshetins decreases with decreasing brand. For instance, the crate’s maximum step under National Professor 10 is 300 mm, and under National Professor 35, it ranges from 500 mm to 1000 mm.

It is advised to construct a continuous crate for thin corrugated stamps and for roofs with minor slopes. The majority of the time, it is packed using boards that have a cross section of 40 or 30 by 100 mm.

For many homeowners, a corrugated board gable roof provides a useful and affordable option. It’s a popular choice because of its straightforward construction process and simple design. Excellent weather resistance and longevity are provided by this type of roof because it is made of lightweight, durable corrugated board.

Building a gable roof out of corrugated board usually requires a few important steps. The frame must first be made sure to be sturdy and properly aligned. The corrugated sheets that will be placed over it are supported by this frame, which acts as the roof’s foundation. To ensure a tight and secure fit, the sheets are then meticulously measured and cut to fit over the frame precisely.

The versatility of corrugated board in terms of design and installation is one of its main benefits when it comes to gable roofs. Corrugated board can be used in both new construction and renovation projects, and it can accommodate a variety of roof pitches and architectural styles. In addition to making installation simpler and faster than with heavier roofing materials, its lightweight design also lowers structural load and facilitates handling.

In conclusion, a corrugated board gable roof combines affordability and practicality. Weather resistance and long-term dependability are guaranteed by its simple construction method and sturdy materials. Corrugated board provides a feasible alternative that satisfies both functional and aesthetic needs, whether you’re looking to improve the aesthetics of your home or are searching for a dependable roofing solution.

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Alexandra Fedorova

Journalist, author of articles on construction and repair. I will help you understand the complex issues related to the choice and installation of the roof.

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