Cornice overhang of soft roof

The cornice overhang is an important component of roofing that affects both functionality and aesthetics. It is particularly important to comprehend this overhang for soft roofs. The roof’s extension past a building’s outer walls is known as the cornice overhang. It has several uses, the main one being shielding the walls from water runoff during snowmelt or rainy seasons. Additionally, this addition protects the building’s siding and foundation from moisture damage, which over time helps to maintain the structural integrity of the building.

The performance of soft roofs, which are usually composed of composite or asphalt shingles, is improved by the cornice overhang. The overhang prevents potential leaks and internal water damage by diverting water away from the building’s foundation by extending beyond the walls. This feature is particularly crucial in areas that receive a lot of precipitation because it can greatly extend the life of the roof and the building as a whole.

A soft roof’s cornice overhang gives a structure more architectural depth and personality. It helps to control indoor temperature by shading the outer walls and minimizing heat gain on sunny days. In addition to its functional advantages, the overhang can be tailored to match the building’s architectural style—whether it be traditional, modern, or somewhere in between. This design feature enhances the property’s overall curb appeal and visual appeal in addition to fulfilling a functional need.

A soft roof needs to have its cornice overhang maintained to be effective and long-lasting. The overhang maintains its structural integrity and keeps up its decorative and protective qualities with regular maintenance and inspections. The soft roof’s cornice overhang is a prime example of the union of intelligent design and sensible construction, serving multiple purposes such as preventing water damage and augmenting architectural beauty.

Cornice overhang of soft roof

Cornice overhangs

Cornice overhangs: what are they? Overhangs are architectural features that extend a predetermined distance behind the building’s bearing walls. Overhangs serve the primary purpose of shielding the supporting structures from the elements, including snow, rain, and melting water that drips off the roof.

Cornices: classification and main types

The overhangs are categorized as follows:

  1. Furied. In most cases, they are used on a hull on a gable roof.
  2. Unsuitable. This type of overhang is considered the most common, it is used in almost every roofing structure, both for single -sloping and gable.
  3. Shortened. They are used on each of the main roofing structures.
  4. Boxed. They are used for holmoral and gable roofs.

The climate characteristics of the area where construction is taking place influence the choice of the cornice overhang house node. The roof cornice device comes in a wide variety of forms and falls into the following primary categories:

  1. Cornice overflowering. In this case, the rafters do not remove the boundaries of the walls, but along their edge, the fasteners of the horizontal drain board are carried out, to which the gutter is subsequently mounted. The disadvantages of these overhangs can be attributed in the absence of protection of the upper elements of the wall from moisture.
  2. Open overhang has been widely used in private construction. The fasteners of the drainage system are carried out to the upper edges of the rafters or along their lower edge.
  3. Closed overhang. For such an overhang, the protruding ends of the rafters are closed with a cornice, which has a special groove for the fasteners of Sofit from the inside. If there is an insulated attic, such a cornice should have a ventilation hole.
  4. Pediment overhang. In this case, the roofing device is completely determined by the fantasy of the designer and can protrude beyond the boundaries of the walls and arrange a flush. The protruding area of ​​the roof needs mandatory binder, the width of which is at least 50 cm.

You can examine the photo’s pediment and cornice overhangs in greater detail.

Materials used for overhanging overhang

Wood and metal are the most common materials used to skin roof overhangs.

  1. Boards. In most cases, this material is obtained from conifers, it has moderate wood humidity. The thickness of such a sheathing according to GOST is 17-22 mm, and the width and length is selected individually for each specific case. The fasteners are carried out on both sides with a step up to 1 m, before this, by first processed by impregnation from a moisture -resistant composition. In the role of impregnation, you can use a special protective varnish or moisture -resistant paint. Having lied roof overhangs from wood need constant care. Processing should be carried out every 3-5 years. In this case, the overhangs will last longer and retain their original appearance. In addition to the protective coating, the structure should be ventilated. To do this, arrange inlet holes at the rate of 1: 400 from the ventilated area of ​​weight. With proper organization of ventilation, air exchange will be carried out through drilled holes and holes of the roof skate. Protective nets are used to protect against birds and insects.
  2. Cink Steel. Such a roof overhang bearing the form of a steel sheet, the thickness of which is up to 0.8 mm – flat or perforated. Anti -corrosion paint is applied to the edges of the sheets.
  3. Aluminum sheets. They are covered with a protective layer, thanks to which the formation of metal corrosion is prevented. The dimensions of the sheets can be within: thickness-6mm, width-100-300 mm, length-6000 mm. The fasteners of aluminum sheets should be carried out on specially intended latches.

The size of the cornice overhang

The location of the roof overhang is taken into consideration when determining its width. Along SNiP, the overhang width can have a minimum value of 40 cm and a minimum of 60 cm in the event of an unorganized drainage system. In actuality, the release of structures beyond the building’s boundaries for lateral overhangs is measured in the range of 50–60 cm, and for front overhangs, it can be as high as 1 m.

The overhangs in wood houses are used to a maximum length of 550 mm, while in brick and panel houses they are up to 550 mm. However, there is a minimum length for the roof, which is 400 mm.In certain instances, the size Cadet overhang can even be 1200 mm.

Bearing options for the cornice

One of the following methods can be used to bend a cornice overhang:

  1. Bearing cornice overhangs with siding.
  2. Bearing of cornice overhangs with wood is considered one of the best options for decoration of the cornice. Pros: naturalness and beauty that cannot be achieved when using unnatural materials. It is for these reasons that this type of cornice is increasingly popular. In addition, the tree is lively, organic and environmentally positive material for exquisite finishes.
  3. Bearing cornice overhangs with copper is considered the most refined type of cornice decoration. Pros: beauty, durability and naturalness, due to which this type of baking cornice is inaccessible to other analogues.

Features of design and installation of cornice overhang

The following considerations should be made when creating and installing a cornice overhang:

  1. The magnitude of the departure of the cornice overhang from the carrier wall. It is a design value that depends on the bearing capacity of structures and other factors taken into account when developing a project.
  2. Cornice overhang of soft roof is obliged to provide ventilation in the undercarbon space.
  3. Methods and elements of fasteners of decorative panels (copper, wood and other metal cassettes, etc.D.) must provide reliable fasteners of the panel under any weather conditions.

The view of the house’s walls and the roof itself will maintain their original appearance and functional characteristics for a very long time with proper installation of overhangs.

Overhang of soft roof cornice overhanging cornices Cornice overhangs: what are they? Overhangs are architectural features that extend a predetermined distance behind the building’s bearing walls. The primary one

"Soft roofs are greatly enhanced in appearance and shielded from weather damage by the cornice overhang. To guarantee the longevity and effectiveness of soft roof systems, it is crucial for both homeowners and roofers to understand its function, appropriate installation methods, and maintenance advice. The significance of the cornice overhang is examined in this article, along with its useful advantages and suggestions for preserving and enhancing it.

The device of the node of the cornice of the pitched roof

Every roof in the house has a cornice device attached to it. A cornice is even present on a flat roof, which is installed with roller materials. Its apparatus is required to prevent rainwater from getting into the sub-worship area. perhaps the roofs with parapets attached are an exception.

The purpose of installing the cornice is to prevent moisture from penetrating the subcutaneous area.

Apart from its functional duties, the cornice serves as the last piece of decoration on the roof structure because the internal rafter system components close after the end of the binder. In order to optimize the protection of the house’s roof rafters, they are taken out of the wall to a 50-centimeter segment outside the wall. This indicator might not rise significantly in some circumstances.

Properties of roofing overhangs

The inside mechanism of the roof’s cornice. When making the box, you should use large quantities of knot-free, non-twisted boards free of bark.

There are instances where the rafter system’s design lacks protrusions that extend past the house’s walls. Simultaneously, a technique is employed which suggests that the rafters are forced to extend because of unique components known as mares.

It is important to remember that the building’s pediment is protected, and this is made possible by the cornice device. There should be at least 500 mm between the overhangs that shield the house’s pediment. In this instance, a cornice-style board is fixed to the roof’s edge. Skin is required for the lower portion of the cornice construction. The most common sheathing for cornice nodes is a board.

It’s crucial to keep in mind that the frontal and pitched cornices have remarkably different designs.

Types of cornice overhangs

The cornice overhang diagram is as follows: 1 rafters, 2 boards of cornice overhang, 3 (4) reference boards for sofits, 5 Sofit, 6 (7.8) crate, 9 drainage groove, 10 drip, and 11 cornice Planck (apron).

Throughout the history of building houses, a vast array of overhanging designs have been created and effectively implemented. Among the primary kinds are:

  1. Unsuitable overhangs – are used in the arrangement of a hip roof of the house both for a napal and gable structure.
  2. Heaty overhangs – are also most often used on hip roofs and are widely in demand when the roof of a gable structure is arranged.
  3. Boxing cornice overhangs – used in the arrangement of a single -sloping and broken roof.
  4. Shortened cornice nodes of the roof are used on absolutely every type of structure.

Such cornices will also look good on the Danish roof.

Varieties of cornice overhangs

The selection of the roof’s cornice node is contingent upon the climate of the area in which the building project is being carried out.

There are various kinds of cornice overhang nodes. It is crucial to delve deeper into the specifics of their design as a result.

Cadet overhang installation plan when a frontal board is present.

In situations where the rafter system is not excreted past the front wall boundary, a flush cornice overhang is used. This calls for using a drain board, which is positioned horizontally, to reinforce the rafters’ edge. This is done to prevent moisture from penetrating the house’s pediment. In this instance, the drainage system is likewise guaranteed. Such design elements also lend uniqueness to a broken roof.

This node has one disadvantage in spite of its benefits, and that is the upper portion of the wall is not secure against water. The overwrestling overhang knot is at least 50 centimeters long. A shorter ledge can be created if it is set up in brick or panels.

Cadet overhang installation plan devoid of winding board.

It is advised to install cornices in the attic to help prevent drafts from forming there and to stop snow from bluffing into the space left by the wall of snow during the pediment construction process, should the house wall be allowed to release puffs beyond its line.

An extension takes the place of the broken roof’s rafter legs’ missing protrusions behind the wall line. They fasten to rafter ends with screws or nails. Following that, the trimming is attached to a cornice board.

When the primary rafters of the gable roof form outside the building, open-type cornial overhang nodes are created. In this instance, the drainage system is conjugated to either the upper edges or the lateral portion of the rafters. This node’s design features enable you to use it to construct a broken roof in a private residence.

During the closure of the rafters projecting for the pediment, overhang, closed cornice nodes are formed. The skin’s components are inserted into a unique groove that is used from the inside for this purpose.

The pediment’s node can be positioned to speak through the walls in addition to being flush. The owner of the home and the designer’s ideas are the only factors that determine the method to be used; either way, it will be accurate. Whichever method is selected, there will always be that portion of the pitched roof that is exposed.

List of materials and tools for overhanging overhang

Since coniferous wood is thought to be the best material, coniferous wood boards are typically used to sheathe the nodes of the cornices on gable roofs. You must consider the material’s humidity content when selecting it. Overly damp material has the potential to distort over time, ruining the overhang’s appearance.

The cornice overhang installation plan with a width exceeding 45 cm.

It is important to note that the wooden casing should have a minimum thickness of 17 mm and a maximum thickness of 22 mm. Additionally, the board’s length and width are chosen separately. Every side of the sheathing undergoes conjugation. Boards longer than six meters are exempt from this. In this instance, the conjugation is carried out in steps that are one meter long, representing the length of the skin-making material.

A waterproof composition should be applied to the boards that sheathe the gable roof’s nodes at the cornices. This is completed prior to beginning work. This is accomplished by using a specific paint or varnish made for wood processing. Every two to three years, wooden casing needs to be treated. She will only be able to live a long time in this situation. Apart from boards, alternative construction materials can be employed for the skin:

Overhanging cornice.

  1. Galvanized steel sheets. When sheathing roofing cornices, steel is used, the thickness of which should not exceed 0.8 mm. In addition to ordinary steel, metal sheets that have perforation can be used. To cut such material, use special equipment. After the sheets are ready, they are covered with paint to avoid corrosion.
  2. Aluminum sheets. Their thickness should not exceed 6 mm, and width – 30 cm. Special latches are used to conjure sheets.

You will need a standard set of tools used in the roof device to line the overhangs:

  • construction level or plumb line;
  • hammer;
  • roulette;
  • screwdriver;
  • fasteners;
  • pencil;
  • Construction corner ruler.

The device of the ventilation system

A tree and an example of a cornation overhang of siding are two of the most common materials.

Enough good ventilation must be available at every cornice node. It is set up regardless of which design elements correspond to a particular cornice node. The diameter of the exhaust openings should be 1/400 of the required ventilation area. Air will enter these holes and pass through the roof skate’s cracks if all the calculations—including the conjugation of the cornice’s parts—are done correctly.

By providing ventilation for the area beneath the roof, the supporting rafter structure is kept safe. Additionally, a superior internal microclimate will be created in the attic by superior ventilation.

Methods for fortifying the cornice

Under wind and snow load, the cornice will start to sag and distort if the node is installed improperly and the conjugation of its sheathing is not done in accordance with the guidelines. Ensuring that the overhang of the overhang is properly conjugated with the roof’s rafter system is imperative to prevent such issues.

It is essential to fix the connecting components of the rafter system as thoroughly as possible in order to guarantee more effective protection of the cornice.

The heating system must be installed in order to avoid obstruction of the drain system on the portion of the roof that is in front of the overhang. This will guarantee that the snow melts instantly and descends into the drain sewer. As a result, there will be much less weight on the roof’s cornice.

You can install the pitched roof’s cornice node with your own hands. In order to shield the roof from atmospheric precipitation, this component is required.

Roof overhangs: types and features of binder

The purpose of overhangs on a roof is to shield the building’s exterior walls from the damaging effects of atmospheric precipitation.

They are an architectural feature that extends beyond the building’s walls.

The characteristics of the device, how overhangs are installed, their varieties, lining techniques, and ventilation strategies will all be covered in this article.


We distinguish between two primary types of cornice overhangs:

For example, a gable roof has frontal (pedimon) overhangs that shield the facade, and side overhangs that run the length of the building’s side walls.

Frontal can be a spray or a protrusion.

Depending on the design concept, this time.

The roof skate is extended to a predefined distance (up to 1 m) outside the building’s facade when equipping the projecting overhang.

Longer carrying roofing crossbars are also fixed on the rafters.

Next, the cornice board is put in place; it is fastened to the ridge’s end sides as well as the crate’s supporting bars.

To give the roof a more finished and aesthetically pleasing appearance, the frontal overhang is frequently hemmed in the lower part.

Side overhang The dimensions of the rafter system’s component parts during construction can also supply it.

If not, the installation of mares—bars that continue the rafters—is completed.

A cornice board is mounted on mares that are fastened to the ends of the rafter beams.

The precise value is ascertained by considering the building’s height, the blind area’s width, and the construction material (wood, brick, or panel buildings).


In the picture below, different executions using different materials are displayed.

Roofing cornices made of corrugated board

Materials for finishing

The most popular type of casing are coniferous wood boards.

The material needs to be dry because wet wood will eventually dry out and deform, making the roof look worse.

The suggested thickness for the wooden casing is 17–22 mm, and the width and length are chosen in accordance with the measurements of the current roof.

Boards that are going to be lined are painted, varnished, or treated with an antiseptic mixture.

The lining’s mounting components are installed one meter at a time.

Less than 6 m long boards are sufficient to fasten in two locations, along the edges.

It needs to be restored every few years.

The roof overhangs can also be lined with galvanized steel sheets.

The ideal range for steel thickness is 0.6–0.8 mm.

Steel sheet installation requires specialized tools, which are first used to mark and cut the material.

Every edge has a corrosion-resistant coating applied to it.

Aluminum sheets that have been sprayed with a protective layer work well for decorating roofing overhangs.

A thickness of 0.6 mm and a maximum length of 6 m are the better choices.

Excessively long lining elements will sag because special latches are used to fix the aluminum plates.

Methods of installation

Through the rafter framework

The overhead boards are installed in accordance with the marking to align the lower plane of the rafter structures.

The final installation is made after the extreme details of the structure are first mounted and secured with a rope or fishing line stretched between them.

In line with the prepared framework

The rafters are initially cut in a horizontal and vertical plane in this version.

In order to ensure natural moisture removal, the beam is fixed on the horizontal cut and attached to the wall 10 cm above the frontal board.

Placing the frontal overhang in place

Parallel to the building’s pediment, the frontal board of the frontal overhang is fastened to the crate.

Keep an eye on the roof’s veils binder. and how to handle a handicap.

Regarding the yendovs’ installation with a roof using a profiled line by link. Concerning the soft roof’s valley device as well.

Here is where you can find out what covering the house’s roof costs less. How to cover a private home’s roof.

Ventilation and protection

In addition to maintaining the attic’s ideal microclimate, the overhang ventilation guards against harm to the rafter system’s components and the crate.

Ventilation can be achieved in two ways:

  • leave the gap between the wall and the material of the skin;
  • Introduce special plastic lattices into the elements of the skin.

Airflow that enters through ventilation holes exits through previously designed holes in the roof skate.

To prevent birds, insects, and rodents from entering the attic through any roof openings, a net should be placed over them.

A more substantial ventilation system needs to be maintained if the attic is large in area or if its layout is planned.

There must be ventilation holes in the thermal insulation material if the roof is insulated.

Controlling the quality of its installation is essential to prevent deformation caused by strong winds or heavy precipitation.

The roof’s rafter system should be integrated with the overhang and sheathing material.

Pay attention to the drainage system’s condition and the elements’ dependable fixation. A clogged drainage system can cause significant pressure on the overhang’s design and delay the precipitation on the cornice.

Installing and decorating the roof should only begin after a careful examination of the theoretical aspects of this matter.

A well-made overhang will dependable shield the facade and increase the lifespan of the roof and the building as a whole.

The purpose of installing the roof overhang is to shield the exterior walls. Think about the different kinds of overhangs, the methods used for installation and hem, and which

Understanding a soft roof’s cornice overhang reveals that this feature is much more important than just looking good. The overhang acts as a barrier against weather conditions like rain, snow, and direct sunlight. It usually extends beyond the building’s edge. This useful addition not only protects the walls from moisture but also provides shade, which lowers the interior temperature of the building.

Moreover, the roof’s overall drainage system depends heavily on the design of the cornice overhang. It averts possible water damage and erosion over time by diverting rainfall away from the building’s foundation. This factor is especially crucial for preserving the building’s structural integrity and increasing the roof’s lifespan.

In terms of architecture, a building’s cornice overhang enhances its aesthetic appeal. It enhances the roofline’s profile and produces a recognizable silhouette by giving it more depth and dimension. Beyond aesthetics, regional climate factors and architectural styles can affect the overhang’s shape and size, reflecting both pragmatic and cultural influences.

In conclusion, the cornice overhang of a soft roof performs a number of vital functions that are frequently disregarded. Its dual role of enhancing architectural aesthetics and providing protection from weather elements highlights the importance of this element in building design and maintenance.

Video on the topic

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Soft roof on a frame house. Cornice overhang and nuances of laying.

What do you think, which element is the most important for a reliable and durable roof?
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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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