The roof of a building is exposed to a particularly intense effect of various natural factors, therefore, not only the comfort inside the house, but also the duration of operation of the entire structure depends on the reliability and quality of its structure. Particular attention should be paid to the choice of material and the sequence of installing the layers of the roofing cake under the metal tile. The article provides information on the materials necessary for arranging a reliable roof - the main performance characteristics, the need for use, installation features, etc. After reading the article, you will be able to control the quality of the builders' work, and, if necessary, do not allow them to “save” on the purchase of cheap building and insulation materials or to “simplify” the installation technology.
Source spb-artstroy.ruA metal roof cake with insulation consists of several layers, each of which has its own purpose:
Outer cover... Metal tile or her a budget option- metal profile (profiled sheet, corrugated board). It is recommended to use metal profiles to cover utility buildings and technical structures in roof structures without insulation;
Lathing. Wooden frame to which the outer cover is attached;
Waterproofing... Protects the rafter system and thermal insulation from moisture;
Counter grill... Wooden slats that create a ventilation gap between the outer cover and insulating materials... Thanks to the counter grill, humid air and condensate do not come into contact with the thermal insulation;
Sound and vibration isolation... Damping elements are part of the large-area roof frame. It is allowed to use such brands as Isoplast bi-not, Sylomer, etc. Roofing structures of small and medium sizes can do without them, subject to careful installation of the supporting base (flooring), use of fibrous thermal insulation and strict adherence to the technology of fastening metal tiles;
Rafter system... The set of load-bearing elements of the roof, which is the basis for fastening all layers of the roofing cake;
Thermal insulation... Reduces the heat loss of the building. It is recommended to use fibrous thermal insulation materials with a high degree of noise insulation: mineral wool, basalt wool, glass wool;
Vapor barrier... Protects roofing cake from humid air coming from the interior of the structure;
Internal counter grill... Small-section wooden slats that create a ventilation gap between the vapor barrier membrane and internal finishing materials;
Sheathing... Rough: plywood, OSB, drywall, intended for fixing decorative and finishing materials. Decorative: plastic or wooden lining, false timber, decorative panels.
The technology for arranging a cold roof is much simpler than an insulated one:
To the rafters with a construction stapler fastened waterproofing membrane;
Along the rafter legs planks are installed counter bars;
Sheathing elements are consolidated perpendicular to the rafters;
Anchored roofing material - metal tiles.
Cold roofs are used for technical structures, garages, storage facilities and other outbuildings.
A standard roof truss system for lungs is used for a roof made of metal roofing materials... The section of the timber is 50x150 mm, the pitch of the rafter legs is 600-950 mm. As a rule, a step of 600 mm is accepted for ease of installation. thermal insulation materials... This distance allows you to place entire sheets of insulation between the rafters without gaps and without the need to cut them, which will significantly speed up the installation process.
In the northern regions of Russia, it is recommended to use a timber with a section of 50x200 mm for rafters. This is due to the need to withstand increased snow and wind loads, and also allows a thicker insulation to be placed between the frame elements.
The choice of waterproofing material that is part of the roof under the metal tile depends on the purpose of the structure. The use of ordinary polyethylene film, glassine or roofing felt is allowed to insulate non-insulated roofing structures used in unheated technical buildings.
Two-layer polymer- consists of two layers of polyethylene film with a reinforcing mesh between them;
Super diffusion membrane- characterized by one-sided vapor permeability. Its location during installation - with the permeable side towards the insulation, so that moist air is removed from the thermal insulation into the ventilation gap.
Flocked waterproofing- is also a diffuse moisture-wicking material. In addition, it prevents the formation of condensation. Installed with a fleecy, vapor-permeable side to the insulation.
Any of the waterproofing membranes is laid on the roof plane parallel to the ridge, starting from the bottom. The overlap between the panels is 10-15 cm and is additionally glued with construction tape. Fastening to the rafters is carried out with a construction stapler.
It is located between the lathing elements and the rafters, forming a gap between the waterproofing layer and the roofing material. It is made of wood in the form of bars 30x50 mm. If the roof has a complex structure, large area or a significant length of the slope, then for the counter-lattice, bars with an increased section are used - 50x50 mm. It is located along the rafters and is attached to them with nails or screws with self-tapping screws 50-75 mm long.
It is a supporting base for metal sheets. It is made of boards with a section of 50x200 mm or a bar of 40x60 mm, located perpendicular to the rafters In practice, these elements are often used together, if it is necessary to especially firmly fix the outer sheets of metal, in case of increased wind loads in the region and / or high windage of the roof structure. In this case, the main area of the roof is covered with a timber, and the lower part of the slope is covered with a continuous flooring from a board. The pitch of the lathing elements depends on the wave of the metal tile and is 800-1000 mm. Fastening is carried out using nails or wood screws (self-tapping screws) 60-75 mm long.
Important! All wooden elements roof structure must be treated with antiseptic (against fungus, mold, rot) and flame retardant (increase flame resistance) impregnations. Manufacturers of construction chemicals also offer universal wood processing products that significantly increase the service life.
On our website you can find the most ... In the filters, you can set the desired direction, the presence of gas, water, electricity and other communications.
Mineral (basalt) wool is a traditional heat-insulating material for a roof pie under a metal tile with insulation. It is sold in rolls and slabs. The size of slabs from most manufacturers is 1000x600x50 (100) mm. They are installed in the rafter space.
The use of slabs is preferable, since when laying them, additional fasteners are not required to hold the material between the rafters. The installation of thermal insulation is carried out as tightly as possible, but at the same time it is necessary to ensure that the material does not deform or shrink.
For the insulation of technical buildings, it is more advisable to use expanded polystyrene, since it better withstands moderate mechanical stress and does not need additional protection from inside the structure.
It is advisable to fill the gaps between the expanded polystyrene plates and between the insulation and the rafters polyurethane foam... This will not only exclude warm air leaks from the room, but will also give the entire structure additional strength.
It is one of the most important layers of the roof pie for metal tiles. Its main purpose is to protect thermal insulation materials from the influence of warm humid air coming from inside the premises. The use of vapor barrier is mandatory when using fibrous thermal insulation materials, since absorbing moisture, mineral wool significantly reduces its effectiveness.
The most common vapor barrier material with an affordable cost is glassine. However, it has low strength and durability. The polypropylene "woven" membrane is stronger and more efficient. It is produced under many brands and is positioned by the manufacturer as a universal insulating agent - hydro-wind-vapor barrier. In addition, this material prevents the formation of condensation.
One of the specific properties of metal tiles is high level noise from external influences. Therefore, special attention is paid to noise insulation:
All structural elements are consolidated screws. Connect parts reliably pull them together to prevent the formation of gaps and backlash;
Calculated position of crate elements in such a way that the edges of the sheet of roofing material are located on the carrier rail;
Installation of all elements of the battens and counter battens is carried out no deviations from the working plane, as evenly as possible, without bumps and depressions. This will avoid distortions when installing metal tiles.
The noise level is significantly reduced by the use of fibrous insulation materials. Some manufacturers produce specialized grades of thermal insulation with a high sound absorption coefficient, from 0.5 to 0.8.
It is advisable to carry out special measures for vibration isolation if the house is located near railroad, highways with heavy traffic or if the roof slopes have a large area. To do this, special damping pads are used to separate the layers of the roof under the metal tile between the bars of the counter-lattice and the rafter beams.
In the video, you can see the rules for installing a roofing pie:
High-quality metal tile has a thickness of 0.4-0.6 mm and several layers of protection. It is almost impossible to visually check the presence of internal protective layers, therefore, when purchasing a roofing material, ask the seller for a certificate. To protect against corrosion, the metal tile is painted on the inside, and on the outside it has a polymer coating, which resists external influences much better than paints and varnishes... The durability of operation and the cost of the roof depend on the type of outer protective layer. The most common are the following types of polymer coatings:
Polyester... The thickness of the protective layer is 25-30 microns. It has an affordable cost and relatively high performance characteristics. The warranty period for metal tiles with a polyester coating is 8-10 years;
Polyurethane... It is characterized by resistance to mechanical damage, temperature extremes and various chemicals. When the sheet is bent, such a coating does not lose its integrity;
Polyvinyl chloride... Demonstrates high resistance to mechanical, chemical and thermal influences. Has high plasticity. It is recommended to use metal tiles with such a coating for laying on embossed surfaces. It is advisable to use in regions with an extremely hot climate;
Plastisol... Consists of polyvinyl chloride with the addition of a plasticizer. It is applied with a layer of up to 200 microns, which allows you to apply a relief pattern to the surface of the metal tile. They have low resistance to high temperatures, which makes it impossible to use it in regions with hot climates.
A ventilation gap is also formed between the vapor barrier membrane and drywall or OSB sheets. For this, wooden slats with a section of 20x30 mm are used, attached to the rafters perpendicularly.
From the video you can learn how to make a roofing cake for metal tiles correctly:
Despite the high cost of materials and significant labor costs when arranging a roofing pie under a metal roof, it is highly discouraged to "simplify" the technology by skipping layers or using cheap insulation membranes from unknown manufacturers. The consequences can be the saddest, right up to the complete replacement of the roof.
If you do not plan to make a living room in the attic, you can leave the attic cold - store some things here, arrange a workshop, hayloft, etc. The roof does not need to be insulated. How is a cold roof made of soft tiles, are there any features?
The basic rule for cold attics does not depend on the coating: a full-fledged pie is made in the attic floor, otherwise the house will be cold.
The rest of the pie is made according to all the rules: vapor barrier, waterproofing, the floor is sewn up with boards on top.
The second feature concerns ventilation. Differences in materials are already evident here. Soft roofs (unlike profile metal) do not have waves that would serve as ventilation. The bituminous coating is completely sealed, does not breathe.
Otherwise, the technology of a cold roof made of soft tiles differs from an insulated one: on cold roofs, a continuous sheathing can be placed directly on the rafters (without a counterbeam). The entire attic serves as a ventilation gap. The crate and rafters are not covered from the inside.
When installing a cold roof, additional measures are taken to ventilate the attic:
I already wrote in more detail about ventilation of a soft roof in one of the articles. You can get to know her.
Due to the absence of a pie, it is easier to make a cold roof than a warm one:
1. Lay a solid plywood or OSB crate on the rafters. Plates should be laid with an interval of joints. The joints should be on the rafter legs. Between adjacent slabs / sheets - a technological gap of 3 mm. Fastening with screws or nails.
2. Backing carpet: on sloping roofs the entire roof area should be covered.
3. Install cornice planks over the edge of the carpet. Fix with nails with a zigzag every 10 cm.
4. Install the end strips in the same way.
5. In the valleys, lay on top of the lining. The edges are fixed with nails every 20 cm.
6. Lay the shingles in rows from the eaves to the ridge. Installation of tiles on gable roofs begins from the end, on hip roofs - from the middle of the overhang.
7. Placed on top of the plank with an indent from the edge of 3-5 cm. Set on glue (or on a self-adhesive layer), fix with nails. The joints of the eaves should be closed with petals.
8. The next rows are laid so that the petals overlap the attachment points of the previous ones.
9. In the valleys and at the ends, the tiles are cut and planted on glue. Fixation with nails.
Majority modern houses have a cold-type attic. Compared to a warm attic or attic, such a roof is less expensive in terms of materials and installation time, but don't let the simplicity of the device fool you. To avoid mistakes when constructing a cold roof, follow the instructions from RMNT.
Warm air always moves upward, penetrating even the smallest cracks and gaps in the ceiling. To keep the maximum heat inside the house, a sufficiently powerful heat protection belt with a thickness of up to 300-350 mm is arranged above the ceiling. The thermal insulation is laid as tightly as possible in order to slow down the ascending hot stream as much as possible.
The insulation needs to be protected from getting wet, so the steam, which is carried by the warm air, needs to be blocked. For these purposes, the ceiling is covered from the inside with a vapor barrier - a special membrane that allows gases to pass through, but retains evaporated moisture, and rmnt.ru has already talked about these materials in more detail in a separate article. On the inside, the heat insulator has enough high fever therefore, condensation does not form on the vapor barrier.
The outer side of the insulation is cold. It is ventilated with outside air, so that moisture does not accumulate in the insulation. The attic floor is the only thermal protection step; no other cold attic structures perform this function.
The main problem with a cold roof is that condensation forms on the back of the roof during temperature changes. Since the air in the attic remains warm for a long time after sunset, and the roof almost immediately acquires the temperature of the outdoor environment, the appearance of moisture drops is an inevitable phenomenon. Falling down, they fall on the overlap cake, moistening it. This leads to a weighting of the filler, loss of heat-insulating properties, the formation of dampness and mold. That is why, when installing the roof of a cold attic, installation of under-roof waterproofing is mandatory.
Since the insulation will not fit between the rafter legs, their step and section can be chosen absolutely freely. The kalk.pro service will help in this matter: in the "Roofs" section there is an opportunity to model and calculate load-bearing elements and lathing for any type of roof.
The most suitable lumber for the device of rafter legs is considered to be a board with a thickness of 50-70 mm and a width of 100-200 mm. Based on the weight of the roof and the projected snow load, the step between the rafters of such a section is adjusted in the range of 60-120 cm. It is imperative to take into account that the rafters during installation are reinforced with a counter-lattice 30-40 mm thick, so it is reasonable to initially choose the width of the board a little smaller.
When installing the rafter system, it is imperative to put your legs in common planes in order to subsequently avoid problems with leveling the battens. For these purposes, it is recommended to rigidly fasten the extreme rafters to the spacers, pull the cords in the upper and lower parts of the ramp, and then put the rest of the legs along them. The rafters should be temporarily fastened from the inside of the roof until waterproofing and a counter-batten with lathing are installed on the outside.
Micro-perforated foils are best suited for waterproofing cold roofs. This is one of the cheapest and easiest materials to install, which completely solves the problem of condensation. During installation, a roll of film is rolled across the slope of the ramp, starting from the bottom. Each subsequent sheet should be laid with an overlap on the bottom one with a width of about 70 mm.
Installation of the hydro-barrier is best done in calm weather. Temporary fastening is performed with staples to the upper edge of the rafter legs, while it is necessary to adjust the force of the stapler spring so that the staple does not press close to the film, pushing it, but forms a gap of about 0.5 mm. The film must be fixed in such a way that a sag of about 20-25 mm forms between the rafters. This will prevent the water from soaking the counter grill, collecting at the lowest point.
When the entire ramp is covered with a hydro-barrier, you need to nail in a counter-lattice - slats of the same thickness as the rafter legs. Before nailing the rail, the side with which it is adjacent to the rafters can be coated with any alkyd enamel. Sawn materials for counter-lattice and lathing should be pre-treated with fire-bioprotective impregnation. It is recommended to fasten the counter grill either with sharpened nails or anodized screws. Black hardened self-tapping screws are not suitable for this purpose.
The counter grill performs several functions at once. Firstly, it reliably presses the hydro-barrier, while blocking the punctures in the attachment points. Secondly, due to the increased distance between the coating and the waterproofing, there is a path for the upward air flow, due to which the formed moisture evaporates quickly.
The type and method of installation of the transverse lathing depends on the used roofing... Slate, profiled sheet, metal and bitumen shingles are well suited for cold roofing. It all depends on aesthetic preferences and the slope of the slopes.
In total, two types of lathing can be distinguished for a cold roof: solid and plank. Solid sheathing works well for materials such as profiled sheeting that make a lot of noise in the rain. Firm pressing of the covering against a solid massive base eliminates the undesirable acoustic effect and greatly facilitates the installation of the roof.
Solid crate is made either from OSB of 3 and 4 classes, or from moisture-resistant plywood on phenol-formaldehyde resins. The minimum plywood thickness is 8 mm with a rafter leg pitch of 60 cm. OSB has a looser structure, for reliable fixation of fasteners in it, the thickness must be at least 12 mm.
It is recommended to install a solid lathing, starting from the front pediment, laying solid sheets and shifting the extensions to the least visible part of the slope. It is imperative to leave a deformation gap of about 10-15 mm between the plates. If the joint between the slabs is not in the area of the rafter leg, fastening through a backing strip 20-25 mm thick is allowed according to the same principle as fastening horizontal joints.
When all sheets are fixed, the joints must be filled with non-hardening bituminous mastic or special roofing sealant... After sealing, it is recommended to check the sheathing plane against the tensioned cord, if necessary, installing shims of different thicknesses in the main attachment points.
The device of a plank crate is much simpler. Both edged and unedged boards are suitable for it, it is only important not to use materials that are not calibrated in thickness. Sheathing boards are nailed perpendicular to the rafters. In this case, two factors must be taken into account:
In the case of choosing in favor of an unedged board, it must be placed with a wider plane upward. For fastening, it is better not to use screws and self-tapping screws, ordinary nails will do better than any other fastener.
The last issue in arranging a cold roof is the ventilation of the attic. It must be adjustable so that summer heat at the level attic floor the temperature was close to the air temperature, and in the case of a sharp cold snap, there was no abundant condensation. In winter, the ventilation is shut off, which makes it possible to exclude intensive blowing of the insulation and save as much heat as possible.
As a rule, in a private house there is enough front door to the attic and one openable window at the top of the gable on the opposite side. If the roof is hip, you need to make a small ledge under the window.
For roofs with an area of more than 300 m 2, it is recommended to arrange additional vents. They cut into the top of the ramp and help remove air entering the attic in the Mauerlat area. To ensure full air circulation, when sewing spotlights, you need to insert perforated panels after 70-80 cm. You can avoid installing air vents when covering the roof with material with a wavy profile. On the line of convergence of the slopes, you need to leave a gap of about 100-140 mm, which is covered with a wide ridge.
rmnt.ru, Igor Maksimov
When arranging an unheated attic, there is no need to spend money on roof insulation. It is enough to close it from precipitation to give a presentable appearance... The most common materials for roof decoration are soft and metal tiles, corrugated board.
Any non-insulated roof includes standard components:
This is the backbone of any roof, when used different materials and technologies for laying them, the cake is supplemented with different components. Consider the options for the device of roofing pies.
Installation of a cold roof begins with a waterproofing device. Some experts believe that this layer can be neglected and save time and money. To be or not to be waterproofing? Let's figure it out in order:
Whether cold roof waterproofing is needed or not - there are active disputes among specialists in this regard. We recommend that you play it safe and still make a protective layer. Moreover, the membrane can be purchased very inexpensively.
By the way, you should not use an ordinary film for waterproofing - it does not conduct moisture, which means that condensate cannot be released from the attic. The cold roof cake includes membranes having a similar polymer composition, but equipped with a fine-pored structure.
The membrane is attached to the rafters, allowing the material to sag a little. The waterproofing should be fixed with lathing bars, which will provide the necessary ventilation corridor through which steam will be removed.
Further arrangement of the cake depends on the choice of roofing material.
Cold metal roofing is a frequent choice of developers. It is an aesthetic facing material with excellent performance and easy installation. A lot can be said about the merits:
Sizes of sheet metal:
The length of the sheet is vertical dimension, that is, the metal tile is laid in one sheet from the ridge to the cornice. Accordingly, the width is a measure by the cornice or ridge.
The choice of sizes must be approached in a complex way:
The procedure for arranging a cold metal roof pie:
A profiled metal sheet is similar in structure and installation method to metal shingles. The corrugated board has longitudinal stiffening ribs, which provide stiffness coverage. The higher their height, the stronger the sheet.
The transverse crate for corrugated board is calculated as follows:
The step can be determined by the characteristics of a particular sheet:
The device of a cold roof made of corrugated board:
Soft tiles are polymer-fiberglass imitation of natural tiles. Unlike ceramics, fragments of improved bitumen are easy to assemble, they are elastic and not brittle at all, they can easily withstand any atmospheric influences. The soft shingles (shinglas) are reinforced with mineral chips, which add resistance to precipitation, snow and small debris blown up by the wind. The main limitation of its use is the slope of the roof, it must be more than 12 °.
The soft-shingle cold roof structure includes a continuous deck of OSB, plywood, or planks laid with a continuous carpet with no gaps. Such a rigid base is necessary to provide rigidity under the soft material.
The procedure for roofing from soft tiles:
Cold roof construction is the same for all types topcoat, only the types of battens differ:
It is important to choose the right waterproofing - a vapor-permeable membrane. If a decision is made to equip a roof without a moisture-proof layer, it is necessary to take a particularly responsible approach to the choice of the topcoat and its installation.
The ventilation gap will ensure the safety of the wood components from decay and will create a natural escape of steam, which will significantly extend the life of the roof.
Currently, when building a private house, specialists use all kinds of roof structures, but most often they install a cold roof. This perfect option when the attic is not planned to be used as a living space. Below we will tell you about how to properly install a cold metal roof.
The device of such a roof is quite simple - you will need to build a structure, lay a layer of waterproofing, lathing and counter battens, roofing. The main thing, when erecting a cold roof, is to provide a ventilation opening for the possibility of removing condensed moisture. This is necessary in order to Basic structure and the roofing material is not deteriorated by moisture.
The installation of such a roof itself should not be accompanied by complications in the process of work, you just need to correctly fix the roofing so that it does not let precipitation through the joints into the under-roof space. Before creating a pie for the roof of a cold attic, it is worth completing the entire list of calculations, determining the slope of the slopes, the step of the lathing, and choosing the appropriate method for fixing the sheets of metal tile.
Cold metal roofing technology involves the initial construction rafter system, after which a membrane and plastic wrap will be laid on it to ensure. The counter-lattice, the lathing are stuffed and the roofing is laid in the form of a metal tile.
Such a roof is characterized by the fact that there is no need to install thermal insulation for it - all that is required is to equip ventilation outlets under the ridge and on the slopes to remove moisture. Make sure that all preliminary calculations are made as accurately as possible.
Roof installation has the following features:
Let's figure it out so that it lasts a long time. When laying the membrane to protect it from moisture, it should be borne in mind that it should remain with a slight sag, about 20 mm. Thus, it will be possible to achieve drainage of condensed moisture, thereby protecting the rafter system and other elements of the roof from decay. In order to allow water to evaporate on time, without stagnating and thereby creating an unfavorable environment, care should be taken to include in the project a ventilation gap, which is located between the moisture-repellent film and the ridge of the roof.
This implies that the clearance will allow air currents to easily circulate in the space under the roof, removing all condensate. The laid membrane must be free from ruptures or other damage. It is best to use a construction stapler to secure it. The layers of the membrane are laid with a slight overlap, and its edges are sealed with tape.
The device of a roof with a cold attic is such that it can be used in regions with any climatic characteristics. Quite a few people believe that this type of roofing is not applicable for the northern regions, although in fact it is not. Often, in such regions, cold attics... The attic itself is insulated, and the cold roof does not in any way affect the internal microclimate of the upper floors. You don't even need to use the attic, because laying a layer of insulation between the upper floor and the under-roof space eliminates all the nuances that affect heat loss.
When installing a cold metal roof, you need to take care of thermal insulation ventilation holes, chimneys and exits to the attic. In this case, you will not have to worry about the accumulation of condensate, icing, heat loss, or the flow of rain and melt water.
A cold roof can be covered with almost any roof covering, however, metal tiles, due to the ease of installation, are used much more often. Some other types of roofing materials, in particular soft roof, are also quite suitable in this situation, but they require a lot of time and financial costs during installation.
Covering a cold attic with metal tiles is the most convenient and simple way to equip a roof. In this case, the roofing cake will consist of a waterproofing material laid on a rafter frame, lathing and roofing (metal tiles). Actually, the laying of such a coating is carried out very quickly, the main thing is to understand it correctly. The insulating film is fixed with staples or nails, then it is additionally pressed with a counter-lattice screwed on with self-tapping screws. The lathing slats are laid taking into account the size of the metal tile. The board for the lathing is taken with dimensions of 25-100 mm, and sometimes plywood or particle boards if continuous flooring is required.
Laying the film or membrane for waterproofing the attic is done freely, with some sagging. However, it is worth making sure that the integrity of the coating is not compromised, that is, any holes or cracks are excluded. Typically, the film can sag by 15-25 mm. Thus, ventilation of the inner side of the waterproofing membrane is achieved, the removal of condensed moisture to the cornice bar and further into the drain is ensured. Neglect of such simple rule ultimately provoke premature deformation of the roof frame and the entire roof.
The peculiarity of a roof made of metal is such that the film for a cold roof is not able to reduce the noise level that occurs during intense rains falling on the metal. Therefore, living quarters with such roofing are provided with a layer of thermal insulation that absorbs strong noise. Without such a layer, usually only non-residential attic spaces are equipped.
So, a cold roof will include the following layers:
It is noteworthy that too complex professional construction tools are not required for laying metal tiles. You can use the elementary set that every man has on the farm.
In addition to lumber for rafter frame, battens and counter battens, an insulating membrane or film for vapor and waterproofing is required, as well as a sufficient number of metal shingles purchased from the same batch.
All elements are fastened using brackets, self-tapping screws, galvanized nails and even anchor bolts. However, it is worth remembering that they must be of high quality so that the roof does not begin to collapse ahead of time.
As for the laying of the roofing, in addition to the profile sheets, you will need ridge elements, valleys (internal and external), cornice and wind strips, as well as snow holders and gutters.
The main difference cold roof from warm is the presence in the last layer of insulating material, placed between the layers of hydro and vapor barrier. It is advisable to perform a cold roof only if the attic will not be used as a living space.
