Country construction is not a cheap pleasure. Therefore, it is quite understandable that most developers are trying to save at least something and not resort to the services of expensive specialists. In our article, we will talk about the fact that it is quite possible to independently cover the roof with modern material with corrugated board. Moreover, the technology of its installation is not so complicated. How to fix the corrugated board on the roof will be our story.
Characteristics of corrugated board
Decking is wall and roof profiles that have different profiling depths: 10, 20, 45 and 57 mm. Basically, all manufacturers (both foreign and domestic) produce trapezoidal profiles.
The main application of corrugated board:
- Arrangement of roofs.
- Arrangement of ventilated facades.
- Another application (many developers use corrugated board to build fences and walls in non-residential premises).
Most manufacturers produce two types of corrugated board:
- Made of galvanized thick steel (thickness 0.5 m, 0.7 mm).
- Made of galvanized steel, which has a polymer coating (0.5 mm thick).
The main advantages of corrugated board:
- Light weight.
- Environmental friendliness.
- Ease of installation.
- Long service life.
- High anti-corrosion properties.
- Wide choice of sizes and colors.
Before proceeding with the installation of corrugated board, we recommend watching a video tutorial: how to cover the roof with corrugated board video.
On the eve of work, we recommend that you once again carefully read the installation instructions for corrugated board, it is produced by all manufacturers. Don't forget to ask salespeople for this how-to guide, as each manufacturer talks about some of the specifics of mounting their products.
Although, as a rule, all instructions tell you step by step how to cover the roof with corrugated board. All you need is attention and some practical skills.
Also, experts recommend finding out all the nuances of safety when working with corrugated board and find out which tools can be used and which are strictly prohibited.
Prospectus for the installation of corrugated board
Watch the video again on how to properly cover the roof with corrugated board and get to work.If there is a pair of hands to help - it is only welcome.
Since when raising the corrugated board to the roof, you cannot cope on your own. Experts advise even to build a temporary device: wooden logs.
With their help, the tied corrugated board must be carefully lifted onto the future roof. The quality of the roof and its service life depend on how correctly you carry out the transportation, delivery and lifting of the corrugated board.
Roof slope
With a roof slope of 8 ° (at least 1: 7), any coating, including corrugated board, must be mounted with special care. We recommend that you pay attention to the sealing of through knocks, leads and ensuring sufficient ventilation.
In the event that the roof is even more sloping and requires complex design solutions, it is better to contact specialists.
Lining
Before you fix the corrugated board on the roof, be sure to put a lining. It will prevent the occurrence of condensate and protect the thermal insulation layer from its moisture.
The best material for this purpose is a modern material - a superdiffusion membrane.
At the overhang between the first board of the crate and the lining, be sure to leave a gap for ventilation (about 50 mm).
Important: start fastening the lining towards the ridge from the overhang, nailing it with short large-headed nails (20 cm step).
To ensure that the roofing screws do not damage the lining after installing the corrugated board, fasten the counter rail to it in advance. Wrap the edge of the lining up and nail it to the end board, its inner edge.
Ventilation
Before laying corrugated roofing, take care of heat and vapor barrier, as well as ventilation. This will prevent the entire roof structure from excessive moisture.
In order for the air flow to freely rise under the ridge of the roof from the eaves, it is necessary to make ventilation holes, and they must be placed as high as possible.
Experts also recommend using special grilles for ventilation at the ends of the house.
Important: where the air is poorly ventilated, additionally install ventilation ducts.
overlap
Fastening corrugated board on the roof is a crucial moment. It is very important to correctly perform all joints and overlaps. So, we recommend that you perform lateral overlap for the whole wave of the profile.
Although some experts are limited to performing a side overlap in half a wave.
The smaller the angle of inclination of the roof (more gently sloping roof), the more it is necessary to overlap the roofing material. Moreover, it is desirable to treat all joints with a sealant so that the roof does not leak, and snow does not clog into the free space.
Basic rules for performing side overlap:
- With a roof slope angle of 10°, the overlap width is 10 cm.
- With a roof slope angle of less than 10 ° - the width of the overlap is 20-25 cm.
- Be sure to use sealing mastic or tape when making joints and overlaps on sloping roofs.
- The place to be built up is fixed to the wooden crate with special screws in the deflection of the wave.
- Installation of corrugated board to start from the end of the roof.
- If the corrugated board has a gutter, then each next sheet must overlap the groove of the previous sheet.
- The first few plates are fixed with one self-tapping screw in the center of the sheet on the roof ridge.
- After the profiled sheets are aligned with the cornice, they need to be fixed completely, for this you need to fix 5-8 screws per 1 sq.m.
Fastening
Let's talk about how to properly fix the corrugated board on the roof. To do this, we recommend using special self-tapping screws for the roof (their size is 4.8 × 38).
The advantage of self-tapping screws for roofing is obvious:
- Provides complete waterproofing.
- Provide reliable and high durability of connection.
- At the joints, the material is “injured” less, corrosion does not threaten it.
A word of advice: buy screws from a corrugated board supplier. Higher quality screws made from steel (stainless or carbon steel) that are zinc coated. Inspect the sealing washer with special care, it is it that gives a reliable fastening.
Approximate consumption of screws: 5-8 pieces per 1 sq. m. On the eaves and ridge, screw the screw into the deflection through one wave, in the middle of the sheet - into each board on the crate.
You will immediately see how to properly lay the corrugated board on the roof and properly fasten the self-tapping screws: if about 1 mm of the rubber gasket protrudes from under the metal washer, it means that you screwed in and tightened the screw correctly.
End plate
Before proceeding with the design of the end strip, watch the video lecture again: how to properly cover the roof with corrugated board video.
So, we proceed to laying the last roofing end plank. It can be cut to size lengthwise or laid with a large overlap (50 cm or more).
It must completely cover the first wave of the profile on the roofing material. The end plate is fixed with rivets or screws with a pitch of 300 mm.
Snowplow
Its reliability and quality depend on how to properly make a roof from corrugated board. So, in order to prevent snow from sliding and rolling over the entrance to the house, we recommend not saving on installing a special snowplow.
It must be installed near the eaves. In order to further strengthen the ridges on the wave of corrugated board, they need to be more securely fixed. To do this, use all the same self-tapping screws for the roof, screwing them into every second wave on a sheet of corrugated board.
eaves plank
It must be fixed before fixing the roof slabs. Be sure to adhere to an overlap of at least 100 mm, fastening pitch - 300 mm. It can be fastened with both screws and ordinary nails.
Internal joints
We recommend that internal joints be made of galvanized sheet or any other, but a prerequisite is that the material must be smooth.
Under the joint, cover part of the roof with a solid board. There is a gap between the roof slab and the internal joint, it must be sealed with a special sealant. Joints can be fastened with screws or ordinary nails with a pitch of at least 300 mm.
Pay special attention to the joint on the side of the ridge, which is under the ridge bar.
We advise you to mount a grooved bar. It can be attached with screws or rivets, without the use of seals.
ridge bar
To equip the ridge trim, we recommend using the following types of trim: K1, K2, K3. They must be laid with an overlap of at least 100mm and fastened with roofing screws, adhering to a step of 300mm.
Junction nodes
In those places where the profiled sheet and roof structures adjoin, we recommend installing a special bar.
It will prevent all structural elements of the roof from excessive moisture, dust, but only if you do not forget to put a special seal under it.
At the junction in the wall, make a strobe and insert it into the groove. After that, fix the dowels, and process the resulting seam with a sealant.
In order to correctly perform the most complex knots, we recommend that you review again how to properly cover the roof with corrugated board video.
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