Is it possible to put corrugated board on slate. How to replace your own slate roof with corrugated board

Site arrangement 20.06.2020

Good afternoon. Tell me please. Our old house is covered with slate, and we. Is it necessary to remove the glassine under the slate before laying the waterproofing (we wanted to leave it for soundproofing) or can the insulation be laid on top of it? Thanks in advance for your reply.

Decking is a metal sheet processed by a cold-rolled method on a special machine, coated with a layer of zinc, a paint layer or another mixture. It is the most popular polyester and comes in many different shades. Pural, plastisol is considered to be a better and more reliable coating. The profiled sheet does not imitate a tile coating, it is a corrugation in the form of wavy, trapezoidal protrusions, which additionally gives it strength and rigidity.

What are the advantages of corrugated board?

Several types of corrugated board are produced:

Roofing or load-bearing corrugated board, used for various purposes: for roofing and high fences
Wall cladding for wall cladding
Formwork sheets.

The sheet can be of different widths, mainly its range is from 980 to 1850 millimeters. A sheet with a thickness of 0.5 mm is most often used to replace the roof, but there are sheets up to one millimeter thick. The thickness is chosen based on climatic conditions.

When replacing slate with corrugated board, it is best to purchase a sheet eight tenths of a millimeter thick. The height of the corrugation is different, in the range from 15 to 130 mm. The main advantages of corrugated board over slate or any other roofing material:

The corrugated board sheet is lightweight: this allows you to quickly and easily deliver it to the construction site and lift it up, and you do not need to do additional work to strengthen the truss system.
The sheet of a professional flooring has double protection against climatic actions.
It is quite difficult to pierce or damage the material.
Long service life - up to 50 years.
Unlike slate, corrugated board does not fade in the sun, its color remains for many years, there is no need for frequent painting or any repair work.
Decking can be laid on your own, saving on the services of specialists who are not cheap. Even laying with your own hands, without experience, you can make the roof warm and protect it from leaks.
Low cost of corrugated board.

What is needed for laying corrugated board

To replace the slate coating with corrugated board, you will need some materials and components. You may need:

Ridges for the uppermost horizontally lying edges of the roof slope at angled fractures
End strips for overlapping the end part of the roof
Valleys for the design of internal joints of the roof
Planks of internal and external corners to ensure protection of the roof from excessive moisture.

In addition to all this, you will need self-tapping screws (about 8 pieces per square meter), insulation, and a waterproofing membrane.

Do I need to remove the old slate?

About covering the roof with corrugated board is described in the video:

There are two options for covering corrugated board on old slate: leaving the old coating in place and removing it. The procedure for when the slate roof remains in its original place:

1. The slate layer is not removed
2. Vertical rafters are strengthened and installed over the slate, their length must necessarily be equal to the length of the profile on the crate
3. A new roof is being installed, profiled sheets are placed in sections
4. Sheets of corrugated board are attached to the rafters
5. All necessary roofing accessories are installed in the places provided for this (drainage system, slats, etc.).
6. The final details are installed - bends and drains.

It is very easy to lay the corrugated board on the roof, two people will be enough for this. The work will take one day.

The second option is to replace the slate:

First, we completely dismantle the old slate from the roof, trying not to damage the truss system. After carefully inspecting the roof, we find places that need to be repaired or replaced. We immediately impregnate wooden elements with antiseptics, and replace cracked or rotten ones with new ones.
We attach the waterproofing film with an overlap to the rafters. In this case, you need to ensure that the film is solid.
Now we lay the heat-insulating material. Mineral wool and expanded polystyrene are usually used.
Fastening the corrugated board starts from the ends, the overlap is 1-2 waves - it depends on the angle of the roof slope. In places of overlap, the sheets are carefully fastened together; for flat sheets, additional special sealants are used to protect against moisture.

The corrugated board is attached only to self-tapping screws with rubber gaskets (except for the valley), this will protect the structure and material from corrosion, moisture and other damage. It is not recommended to use self-tapping screws with colored heads so that they are not visible against the background of the roof. Before starting to replace the roofing material, it is necessary to carefully calculate the roofing so that the house without a roof is not in the open air for a long time.

2014-07-04

The creation of a roof is always associated with a mass of various nuances that require attention. Mistakes made during design and installation always cause premature destruction of the roof, so they should be avoided by thinking through all the stages of construction work in advance.

One of the problems is the choice and installation of roofing material. In recent years, corrugated board has been increasingly used for roofing, the most important advantage of which, compared with other roofing coverings, is ease of installation, which allows you to perform all the necessary work yourself. How to cover the roof with corrugated board yourself will be discussed in this article.

Characteristics of corrugated board

The professional flooring represents sheet material from steel with a zinc covering. Sheets often have a polymer coating, giving the material additional protection from external factors. A characteristic feature of corrugated board is the presence of a profile, due to which the sheets acquire greater rigidity. Since the rigidity of the material is achieved without increasing its weight, it ultimately turns out to unload the entire roof structure.

Covering the roof with corrugated board is carried out in several stages, going in the following sequence:

Choosing the right material;
Taking measurements;
Transportation;
Preparation of tools;
Preparatory roofing work;
Direct installation of a covering.

Material selection

There are several parameters that you need to carefully consider when choosing profiled sheets for a roof:

Marking. There are several types of profiled sheets, but products with the H marking, which were originally designed as roofing, are best suited for the roof. When choosing a specific brand, it is imperative to pay attention to the wave height, which must be at least 20 mm, and the useful width of the sheet. You can use the general rule: with an increased slope of the roof, it is worth choosing a lower brand of corrugated board. It will not be superfluous to study the quality certificate when buying material.
The presence of defects and damage. Of course, you should not use damaged or deformed roof decking. There should be no cracks, roughness or other flaws on the profile surface, and the coating should be intact. If the sheet bends too easily or breaks at the slightest bend, then it is strongly not recommended to use it. In addition, really high-quality corrugated board after arching returns to its original state on its own.
Price. This parameter is especially relevant with a limited budget allocated for construction. The cost is affected by the thickness of the products and the type of coating. Different manufacturers can have exactly the same corrugated board, so you should study the market and choose the most suitable option.
Coating type. Zinc coating is usually used to protect corrugated board from corrosive attack. The thickness of the protective layer varies, so you need to select the material taking into account the operating conditions. In addition, most profiled sheets also have a polymer coating that provides additional protection and enhances the visual quality of the material. It is worth noting that corrugated board is used not only for roofing. For example, quite often they make an interfloor overlap according to a profiled sheet, which allows you to quickly perform such work.

Do-it-yourself measurements

Before covering the old roof with corrugated board, it is necessary to carry out a number of measuring operations:

It is necessary to measure all the elements of the roof structure and adjust them to the required dimensions;
Special attention is paid to the roof slopes, which is associated with a possible change in the dimensions of the structure during the installation of the truss frame;
The discrepancy between the lengths of the diagonals of the roof slopes cannot exceed 2 cm, otherwise the supporting structure will have to be redone;
Roof slopes should not have height differences of more than 5 mm per 5 m of length.

Transportation of corrugated board

Profile sheets, despite the high rates of mechanical strength, may well be deformed and become unusable if not transported properly, therefore, it is necessary to follow these recommendations:

For the transportation of corrugated board, a solid and durable base is required, the length of which exceeds the length of the sheets;
Sheets must be firmly fixed so that they do not rub or move during transportation;
You need at least two people to load and unload the material, since profiled sheets cannot be dragged or bent;
It is possible to lift sheets directly onto the roof only one at a time, using stretched wooden logs.

Roof covering tools

In order to cover the roof with corrugated board, the following set of tools is required:

Scissors (for a thin profiled sheet, nibbler or lever scissors are suitable, and for products with a thickness of about 1 mm, it is best to take an electrically driven device);
Drill;
Sealant application tool;
rivet pliers;
Knife for cutting heat-insulating material;
Construction stapler;
Template for mounting the crate;
wire cutters;
Screwdriver;
Marker;
Roulette and level;
A hammer;
Lace.

Preparatory work

The whole stage of preparation comes down to the arrangement of the truss frame and lathing - the mandatory elements that make up any roof structure. In addition to their supporting function, these elements evenly distribute the weight of the roof and allow it to withstand certain operating conditions.

A properly designed and assembled crate greatly simplifies roofing with a profiled sheet - it is attached directly to its elements. The presence of a full-fledged crate also provides ventilation for the roofing cake, which reduces the effect of moisture on the structure.

Installation technology of corrugated board - how to block yourself

Before you cover the roof with corrugated board with your own hands, it is necessary to determine the amount of overlap of the sheets, which is determined depending on the slope of the slopes:

With slopes of less than 15 degrees, the minimum overlap is 20 cm;
If the angle of inclination is in the range of 15-30 degrees, then the overlap should be from 15 to 20 cm;
With a roof slope of more than 30 degrees, the overlap of corrugated sheets can be reduced to 10-15 cm.

When all stages of preparation are completed, you can begin to cover the roof with corrugated board, for which the following algorithm is used:

Using a screwdriver and self-tapping screws, the corrugated board is attached to the crate. Fastenings must be carried out in places of wave bending. To make the fastening reliable, you need to select galvanized self-tapping screws with a rubber seal. The consumption of fasteners is usually about 6-8 units per square meter.
In the upper and lower parts of the slopes, self-tapping screws are screwed into the lower wave of sheets, and all other sheets are attached to each board of the crate. Between themselves, the sheets of corrugated board are connected in the upper bend with a fastening step of about 50 cm.
The last sheet, located on the side of the gable, is usually laid with a large overlap or cut to the required size. The end plank must be installed with an overlap of at least 5 cm, and its fasteners must be located in increments of 30 cm so that the element covers the first wave of the sheet.
You also need to install the eaves overhang board in advance. It is installed with an overlap of about 10 cm. The pitch of the cornice fasteners is 30 cm.
For the arrangement of internal joints, you need to use a corrugated board that has a smooth surface. The roof under the joint should be covered with the most durable material. The space between the edge of the corrugated sheet and the inner joint must be filled with a sealant. At the top of the wave, the joint is connected with nails, and at the bends with self-tapping screws. The fastening step is 30 cm. The end of the profiled sheet is placed under the ridge bar, and the remaining cracks and gaps are carefully sealed.
The last stage of work is the installation of a ridge bar, the elements of which are installed with a 10 cm overlap and fixed every 30 cm with self-tapping screws.

This completes the installation of the roofing.

Conclusion

In this article, the question of how to cover the roof with corrugated board with your own hands was considered. This work is not difficult if you approach it wisely and competently complete each stage of the roof arrangement.

How to properly cover the roof from slate to corrugated board?

Good afternoon. Tell me please. We have an old house covered with slate, and we want to cover it with corrugated board. Is it necessary to remove the glassine under the slate before laying the waterproofing (we wanted to leave it for soundproofing) or can the insulation be laid on top of it? Thanks in advance for your reply.

What are the advantages of corrugated board?

Several types of corrugated board are produced:

Roofing or load-bearing corrugated board, used for various purposes: for roofing and high fences
Wall cladding for wall cladding
Formwork sheets.

The corrugated board sheet is lightweight: this allows you to quickly and easily deliver it to the construction site and lift it up, and you do not need to do additional work to strengthen the truss system.
The sheet of a professional flooring has double protection against climatic actions.
It is quite difficult to pierce or damage the material.
Long service life - up to 50 years.
Unlike slate, corrugated board does not fade in the sun, its color remains for many years, there is no need for frequent painting or any repair work.
Decking can be laid on your own, saving on the services of specialists who are not cheap. Even laying with your own hands, without experience, you can make the roof warm and protect it from leaks.
Low cost of corrugated board.

What is needed for laying corrugated board

To replace the slate coating with corrugated board, you will need some materials and components. You may need:

Ridges for the uppermost horizontally lying edges of the roof slope at angled fractures
End strips for overlapping the end part of the roof
Valleys for the design of internal joints of the roof
Planks of internal and external corners to ensure protection of the roof from excessive moisture.

In addition to all this, you will need self-tapping screws (about 8 pieces per square meter), insulation, and a waterproofing membrane.

Do I need to remove the old slate?

Covering the roof with corrugated board is described in:

There are two options for covering corrugated board on old slate: leaving the old coating in place and removing it. The procedure for when the slate roof remains in its original place:

1. The slate layer is not removed
2. Vertical rafters are strengthened and installed over the slate, their length must necessarily be equal to the length of the profile on the crate
3. A new roof is being installed, profiled sheets are placed in sections
4. Sheets of corrugated board are attached to the rafters
5. All necessary roofing accessories are installed in the places provided for this (drainage system, slats, etc.).
6. The final details are installed - bends and drains.

It is very easy to lay the corrugated board on the roof, two people will be enough for this. The work will take one day.

The second option is to replace the slate:

First, we completely dismantle the old slate from the roof, trying not to damage the truss system. After carefully inspecting the roof, we find places that need to be repaired or replaced. We immediately impregnate wooden elements with antiseptics, and replace cracked or rotten ones with new ones.
We attach the waterproofing film with an overlap to the rafters. In this case, you need to ensure that the film is solid.
Now we lay the heat-insulating material. Mineral wool and expanded polystyrene are usually used.
Fastening the corrugated board starts from the ends, the overlap is 1-2 waves - it depends on the angle of the roof slope. In places of overlap, the sheets are carefully fastened together; for flat sheets, additional special sealants are used to protect against moisture.

Roofing work, despite its complexity, can be done independently. Most country and country houses were covered with slate, which is affordable, but has a lot of weight. With the advent of lightweight and aesthetically attractive corrugated board on the market, slate roofs have become less and less common. Nowadays, the roofs of buildings are rarely covered from scratch with a previously popular material, and light metal sheets with a profile are preferred. If you are the owner of an already built building, then you will be interested in how to cover the roof with corrugated board after slate. This work is easy to do with your own hands, and the video will help you.

Work on replacing the roofing material is complicated by the fact that most often people already live in the house, so you need to act quickly. First of all, it is important to choose the right day for dismantling, but you should not rely only on the advice of weather forecasters. Stock up on a strong film or tarp to waterproof the room. This will help prevent leaks during rainy seasons and protect your living space from getting wet.

You will need dismantling tools:

nail puller;
ropes;
hooks, the diameter of which coincides with the same parameter of the slate nail;
a few bars.

Start dismantling with the ridge, and then dismantle the top row of slate. Carefully remove material from the roof using ropes and two guide rails. To control the descent of the sheets, hook them by the nail holes. If you have few helpers and there is a risk that you will not be able to completely replace the coating until the evening, first dismantle one slope, and then the other. Immediately after the slate, dismantle the crate. For corrugated board, it should be arranged differently.

Changing the truss system

The corrugated board can only be mounted on a perfectly flat surface. You can check the plane using the following method:

Screw the screws into 4 corners of the slope so that the hats from the bars stick out exactly 3 centimeters.
Tie a rope to them so that it intersects diagonally.
On this plane you have to navigate when repairing the truss system.

Repair the rafters based on a given plane. If the beam is severely damaged, then it must be replaced. Otherwise, it is enough to align the rafters with an edged board.

Creating the right crate

Next, waterproofing material is laid on the rafters. Position it from the bottom to the skate. Nail the material to the rafters with a furniture stapler so that it does not move out. Do not stretch the waterproofing film, it should sag a little to increase the area of \u200b\u200bthe ventilated space. Two sheets of waterproofing are laid strictly overlapping, otherwise leaks are possible.

Start the installation of the crate with a support beam, which is attached along the entire length of the rafters. If you do not have a timber of suitable length, make a structure from scraps of 1-1.5 meters. Next, from the cornice to the ridge, install a transverse crate of edged shalevka measuring 2.5 by 15 centimeters. Between the boards you need to maintain a distance of 30 centimeters, and the first and last parts of the crate should be located at the ridge and the edge of the roof. The proposed option is suitable for the most common C21 corrugated board. For sheets of other brands, other methods of mounting the crate are used.

After you have completed the repair of the rafters and the new crate of one slope, you can move on to another. Installing the corrugated board in place is not so difficult. To do this, you will need to have a screwdriver, special screws with washers. If you are doing the work yourself, then the following tips will help you:

If you have the opportunity, purchase sheets of corrugated board with a length equal to the size of the rafters with an allowance of 5-8 centimeters.
Use the same ramps to lift the material as you use to lower the slate.
Try not to scratch the polymer coating on the material, otherwise the sheets will rust very soon.
Pay the most attention to the installation of the first sheet, and build the rest of the roof on it.

There should be 6 to 8 fasteners per square meter of material. Screws for corrugated board are equipped with special press washers, which must be monitored when screwing. The steel sheet should be pressed against the crate, but the disk of the washer should not be deformed.

After assembling the roof, mount the wind corners and the ridge.
These elements will need to be replaced with new ones that are lighter and match the color of the roof covering. The skate is fastened with long drills with press washers, which are able to reach the beam and firmly gain a foothold in it.

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We decided to replace the old roof with a lighter and more modern one, you don’t need to immediately look for a construction team, such work can be done with ease with your own hands. Dismantling. Be sure to check the weather forecast and stock up on plastic, even if it promises clear weather.

Training

Prepare tools, a nail puller, rope, bars, and so on. Dismantling is carried out in the reverse order of installation. First, the ridge is removed, then the upper slate row and we reach the crate. The slate descends to the ground along the guides. Then the crate is removed. If you have few assistants, do not rush, you can divide the work into stages, first work is carried out on one roof slope, then on the other.

Stages of work

Slings. Roof decking and slate have different surface requirements. In the case of corrugated board, it should be perfectly flat. To do this, screws are screwed into the four corners of the slope, the lacing is pulled and it immediately becomes clear how flat the surface is. If necessary, the rafters must be hemmed with an edged board.

Crate. Now we lay the waterproofing membrane horizontally, on top of the rafters. You need to start work from the bottom and go up to the ridge. Just never stretch the waterproofing, it should sag slightly, and the joints should overlap.

Along with the installation of the hydrobarrier, a crate is made. Work on the battens begins with fixing the support beam on top of the waterproofing and further to the ridge. After carrying out all the necessary work on two slopes, you can mount the windboard. Installation is carried out to the end of the crate and with a small protrusion in relation to the corrugated board.

Mounting. Ideally, the size of the roofing material should match the size of the slope. This is the distance from the end of the lines to the ridge, with a small margin, about 7 centimeters. Be sure to remove the sheets from the pack, and not pull them out, since the polymer coating of the sheets is very sensitive to mechanical damage. In the installation work, the main thing is to lay the first sheet with maximum accuracy, since it will completely depend on this how all the other sheets will fall. If it is necessary to cut the sheet, then this can only be done from the side of the ridge. Do not overdo it with screwing screws for corrugated boardso as not to damage the metal.

Most importantly, do not forget about insurance for yourself and your assistants. The safety of employees must come first.