Insulated roof from corrugated board

In terms of roofing options, corrugated board insulated roofs are a flexible and effective choice for both residential and commercial structures. This kind of roof combines the insulating qualities that help control temperature and energy consumption with the strength and longevity of corrugated board.

Corrugated board, which gets its name from its unique wavy pattern, is usually composed of asphalt, fiberglass, or metal. These materials are the best for shielding structures from the weather because of their strength and ability to withstand weather. Insulating materials like foam or fiberglass are layered between the corrugated boards when they are used in insulated roofs.

Insulation in corrugated board roofs fulfills a number of crucial functions. First of all, by preventing heat transfer in hot weather and holding onto warmth in colder months, it aids in maintaining comfortable temperatures inside the building. In addition to improving occupant comfort, this lessens the need for heating and cooling systems, which increases energy efficiency.

The fact that corrugated board is lightweight in comparison to more conventional roofing materials like concrete or tiles is another advantage of insulated roofs. Because of this feature, they are less complicated and expensive to install while still offering strong protection from the elements, including wind, rain, and snow.

How to warm a roof from corrugated board?

  • Non -residential roof device
  • Polyurethane foam

The corrugated board’s reasonably priced price and attractive appearance have made it one of the most widely used roofing materials. Corrugated board roof insulation is a necessary step in the building process because it cannot guarantee adequate thermal insulation of the roof.

Insulation plan for the roof.

To guarantee thermal insulation, a structure known as a "Roof pie" is typically utilized. It is made up of wood, waterproofing material, insulation, and corrugated board. "Puff pie" helps keep the house cool in hot weather in addition to preventing condensate formation, roofing leaks, and heat loss. Furthermore, the insulated roof effectively blocks out sound, which is particularly apparent in the event of rain or hail.

  • corrugated board;
  • Mineral wool or glass wool as a heater;
  • waterproofing membrane;
  • special vapor barrier film;
  • construction knife for cutting insulation;
  • connecting tape for the design of film joints;
  • Skorita;
  • screwdriver;
  • self -tapping screws;
  • board 140×40 mm for the device of the crate;
  • Board or beam 40×40 cm for the counterparty;
  • lining or moisture -resistant plywood for finishing the ceiling of the attic (if necessary).

It is necessary to determine whether the attic will be residential before beginning to warm the roof. If the answer is negative, the insulation can be moved straight from under the roof to the attic floor. Its primary function in this instance is to heat the house; attic insulation is not necessary.

The attic’s "roofing pie" is installed.

Waterproofing is carefully considered after the roof insulation is arranged.

Insulation between rafters on a roof.

When moisture penetrates the insulation, it causes icing of corrugated board, rotting of rafter system components, damage to finishing materials in residential buildings, and the growth of mold and fungus. On top of the rafters, the waterproofing material is positioned horizontally and secured with a bracket. Every row after that is mounted overlapping, and connecting tape is used to glue the seams together. Additionally, the joints between the materials in a row are overlapped and taped shut. These joints ought to be in rafters, ideally.

The roof frame device is the next step. Above the waterproofing membrane, 140×40 cm boards with a step of 1-1.5 m “on the rib”—that is, 140 cm of lag—are positioned perpendicular to the rafters. The counterparty’s boards, spaced 50 centimeters apart, are already fastened in parallel with rafters further along the lags. A profiled sheet is used to sheath the formed frame.

The inside of the roof is used to install the insulation. Slabs of mineral wool are placed "in the spacer"—between each rafter at intervals. With a construction knife, the insulation in rolls is broken into pieces the necessary size. The insulation should have a maximum thickness of 100 mm. If you don’t have any of these materials, you can use a thinner one and arrange it in multiple layers with joints spaced apart.

The insulation is covered with a vapor barrier film that is fastened to the rafters using a bracket. A connecting ribbon is used to glue the overlapped joints together. Wood casing is mounted at the end. Plywood or a lining may be used. The material’s resistance to moisture is what matters most.

Non -residential roof device

Similar to the previous example, waterproofing is carried out in this instance before the frame and corrugated board are installed. Additionally, insulation is arranged somewhat differently. The vapor barrier is installed in the attic, with a 15-cm overlap, and the joints are sealed with a unique tape. The vapor barrier is slowly covered by the insulation. As a result, the living areas below are warm and the attic area is cold.

Polyurethane foam

Both the foam insulation of the roof and the mineral wool slab insulation are completed.

There is an option where roof insulation takes place without the "pie" structure. This can be accomplished by directly applying polyurethane foam to corrugated board, creating a monolithic coating devoid of joints and seams. Because of the special qualities of polyurethane foam, you can forego adding more vapor and hydro-barriers. The application of liquid foam, or polyurethane foam, allows for the warming of roofs up to 1,000 kV in a single day. A heater like that repeated its geometry and fit snugly against the roofing. Foamed polyurethane has a 50-year shelf life.

High adhesion of polyurethane foam allows it to be used as a heater not only for the roof of a private house, but also for roofs of industrial buildings, where metal rafters are usually used. In order to avoid condensate formation, thermal insulation is required not only of corrugated board, but also a rafter of metal. Roofs of industrial facilities often have large spans. Polyurethane foam, due to low weight, has a minimal effect on the design of the roof. Polyurethane foam can also be applied to the outer surface of corrugated board. This will protect the roof from the effects of precipitation and make it completely sealed. However, in this case, you need to take care of protecting the insulation from ultraviolet radiation. To do this, use a special coating, resistant to radiation.

Roof insulation is possible with little effort thanks to modern technologies. We are discussing the use of insulation with corrugated board. This roofing material has an additional layer of insulation and waterproofing on top of the outer metal layer. Because of this material’s thermal conductivity, extra thermal insulation is not necessary. Determine the best way to precisely warm the corrugated board roof based on your financial situation and the characteristics of the roof’s operation.

Without waterproofing, insulation for corrugated board becomes useless because moisture seeps through and causes mold and wood rot to appear.

"Adding insulated corrugated board to roofing systems is a useful and affordable way to improve a building’s comfort and energy efficiency. These roofs offer good thermal performance and support sustainable building methods by fusing the robustness of corrugated materials with effective insulation. This article highlights the adaptability and efficiency of insulated corrugated board in contemporary roofing solutions by examining its advantages, installation procedure, and related factors."

Insulated roof from corrugated board

Why is corrugated board used as insulation on roofs? There is a clear answer to this query. About 25% of the heat loss in the space occurs through the roof. As a result, installing proper and efficient roof insulation is a crucial task.

You can lower the amount of energy used for the room’s air conditioning by using profiled sheet insulation on the roof and reducing heat loss through the roof. It is common knowledge that warm air rises beneath building overlaps more easily than cold air. This is why you can greatly lower your heating expenses and improve the comfort level of the room thanks to the insulated corrugated board roof.

Basic requirements for thermal insulation materials when installing a warm roof from corrugated board

A vacuum is thought of as the perfect insulation because it closely resembles the dry, everyday air that surrounds us. Thermal conductivity (W/(m ° C)) is 0.025. This quality is the most crucial for any type of insulation. The effectiveness and cost of warming the roof decrease with decreasing thermal conductivity and thickness of the thermal insulation layer. Thermal conductivity in a variety of contemporary heaters can range from 0.029 to 0.23 W/(m ° C).

Hygroscopicity—the heater layer’s capacity to absorb moisture—as well as vapor permeability are two other crucial properties of thermal insulation materials. The final property establishes the material’s capacity to transfer airborne moisture without holding it in place.

You can construct a "breathing" roof with an efficient heater; a professional roof with a heater that maintains the ideal humidity level in the space is just that.

Thermal insulation materials vary from one another in addition to these fundamental qualities due to their compression, elasticity, and elasticity. These specifications are chosen based on the operating environment of the corrugated-board insulated roof. For roof insulation, the most popular heat-insulating materials are those made of basalt fibers or foamed polystyrene.

Prior to installing corrugated board roof insulation, the thickness of the insulation layer must be ascertained. This computation is fairly intricate because a lot of variables need to be considered, ranging from the humidity level to the terrain’s temperature coefficient. The heat transfer coefficient for the roof is denoted by the Latin letter R and is the coefficient that accounts for the relevant factors.

This coefficient, which is shown in the table below, is already intended for use in Russian Federation administrative centers. You will need to use specific regulatory documentation if you need to finish the calculation for another area. SNiP 23-02-2003, "Thermal Protection of buildings," in particular.

An approximate calculation for the cities of Yakutsk, Salekhard, and Anadyr is shown in the table. These cities require clarifying calculations due to challenging climate conditions.

Once you know the coefficient R, figuring out how thick of insulation you need is very easy: just multiply the insulation’s coefficient of specific thermal conductivity (λb) by R. The thickness of this kind of insulation will be determined by the final value.

You can find the insulation’s coefficient of specific thermal conductivity on the packaging or in the certificate that comes with it. I want to draw your attention to the fact that you must take the precise coefficient with index B, which represents how the material is used in a humid environment.

Technology indicates that the corrugated board device for a warm roof is dependent on the roof’s design. Pitch or flat corrugated board roofs are both possible. The insulation installation technology used in the first and second cases differs slightly.

Corporal with insulation on the pitched roofs

We will only partially solve the problem after performing the required computations and figuring out the thickness of the thermal insulation layer. The primary goal is to establish the necessary conditions so that the chosen insulation will continue to function as intended and the corrugated board combined with the insulation will provide a warm and comfortable living space.

Moisture poses the biggest threat to the majority of thermal insulation materials. Ordinary air trapped inside granules or insulation fibers serves as the foundation for all insulation. All thermal insulation materials are therefore very simple. Ultimately, materials with lower specific gravities have more air within their pores, which contributes to their superior thermal insulation qualities.

However, thermal insulation materials benefit greatly from being in a humid environment because of the significant changes in their properties. The primary measure of an insulation layer’s characteristics, its thermal resistance, falls by 50%, or half, if its moisture content rises by 5%.

The device used to insulate corrugated board roofs is typically made of rolls or plates of roof heater based on basalt fibers. The fact that they can take in moisture from the air around them is a drawback.

Polystyrene stoves do not absorb moisture, in contrast to these materials. However, they can break down at temperatures above 60 degrees and are extremely brittle and combustible. As a result, warming roofs with polystyrene foam plates is a relatively uncommon use.

What is the source of this hazardous moisture and how can we shield our roof from it? Moisture within the insulation could be caused by two main factors. First, atmospheric precipitation, or just rain or snow, is the first. The second is condensation, which can happen when warm, humid interior air on one side and cold, outside air on the other come into contact with the roofing.

First and foremost, the corrugated board roofing itself shields the insulation from atmospheric moisture. Additionally, corrugated board requires a specific substrate when using the device known as the "roofing cake." These are typically unique vapor-permitting membranes that allow water vapor to pass through in a single direction. The insulating layer is covered with these membranes. Corrugated board is made of a substrate that prevents moisture from the outside from penetrating a layer of thermal insulation and makes it easy for moisture inside the insulation to escape.

The substrate beneath the profile is placed atop the rafters and pressed up against them by 40–50 mm thick wooden bars. They are known as counterparties and are mounted along the rafters. The corrugated board is fastened to a crate that is positioned perpendicular to the rafters. As a result, a ventilation space forms between the corrugated board and the membrane. The air moving through that area dries out the undercarriage, ensuring that the substrate beneath the roof’s corrugated board is never wet.

A hydraulic tank protects the professional with insulation underneath. This is the term for a polyethylene film that has been strengthened with more fiberglass. She is the one who shields the insulation layer from the moisture found in the heated room’s warm air. It is advised to leave a space of two to three centimeters between the insulation and the hydraulic barrier for improved ventilation.

The device of warm roof from corrugated roofs on flat roofs

Flates typically construct the roofs of industrial and non-residential structures. In most cases, the corrugated board in this situation turns out to be below thermal insulation rather than higher. In other words, it fulfills the function of overlap.

A waterproofing film with a 100 mm overlap should be used freely when warming such roofs over profiled sheeting. Slabs for insulation are then arranged. There are two ways to lay them: one layer and one layer.

One approach is referred to as a single-layer. Heat-insulating plates are always stacked in multiple layers since their thickness is limited to 100 mm. However, every heater plate in the "single-layer" design has the same density.

When using a two-layer technique, the load capacity is higher due to the higher density of the upper layer of heat-insulating plates. In this instance, the load on the roof is distributed throughout the whole thermal insulation layer by the slabs of the upper layer. You can create operable roofs with this styling technique that are easily able to support human weight.

Following the installation of the plates, a bitumen or PVC roofing coating is applied on top of the thermal insulation layer.

Do you need to warm the corrugated board roof but are unsure how to go about it? Visit the website! You will discover here the different kinds of insulation and how to figure out how thick the insulation layer is in your area. The article also looks at how the roof pie is constructed for pitched flat roofs.

Selecting a corrugated board insulated roof can greatly improve your building’s comfort and energy efficiency. This kind of roof combines the benefits of insulation that helps control interior temperature with the long-lasting corrugated materials.

The ability of an insulated corrugated board roof to provide thermal insulation is one of its main benefits. This aids in keeping the building’s interior temperature comfortable all year round. It lessens heat penetration in the sweltering summer months, keeping the interior cooler. It keeps too much heat from escaping during the winter, which minimizes the need for heating and lowers energy costs.

An insulated corrugated roof has structural benefits in addition to thermal ones. Strong defense against wind, rain, and snow is offered by the corrugated board. Because of its durability, it can be used in a variety of climates and guarantees long-term performance with little upkeep.

Selecting an insulated corrugated board roof can also be a sustainable option. Recyclable materials that lessen environmental impact are offered by many manufacturers. This choice is consistent with contemporary building methods that place a high value on sustainability and energy efficiency.

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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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