After the construction of the walls of the future garage is completed, the question arises of how to cover the roof of the garage correctly and reliably so that it provides effective protection for the car standing here from atmospheric and other external influences. When covering the roof, various structures and roofing materials can be used, this article will tell you more about this.
Garage roof covering is selected from the following types depending on the tastes and needs of the owner:
- Do-it-yourself gable garage roof allows you to organize the space above the main room, where an attic can be arranged, for example, for storing various materials and tools.The area of the attic will depend on the height of the central part of such a roof and the divergence of the ends of the roof from its center.
- The garage mansard roof is one of the more expensive types of garage roofs. Its cost increases significantly due to the high material costs during construction, but it allows you to equip the second floor of the garage as a full-fledged room.
- The cheapest type is a shed garage roof, which requires the least amount of building materials during construction: this type of roof requires only the installation of a floor slab and pouring a layer of tar over the slab. An even cheaper option is to lay slate instead of tar.
- A gable uneven garage roof is erected in cases where the construction of a shed flat roof becomes impossible due to the large thickness of the snow cover in winter and the angle of attack of the winds.
The chosen type of roof also determines the design of its truss system.
The choice of materials for covering the garage roof
Today, a wide selection of materials can make it difficult to choose what to cover the roof of a garage with. The most popular are ondulin and asbestos-cement slate, as well as corrugated board.
The advantages of these materials are their relatively low price and availability of installation, which does not require special skills and abilities from the developer and allows saving on inviting specialists.
Ceramic and flexible bituminous tiles are more attractive, but also more expensive materials that can be used to cover the roof of a garage.
Let's take a closer look at the different types of garage roof coverings:
- Metal tile or corrugated board is galvanized profiled metal sheets, which are often coated with polymers. The advantages of these materials include their low weight, increased strength, long service life, ease of installation (fastening is done using self-tapping screws), etc. Membrane is used as a waterproofing layer when covering the garage roof with these materials.
- Slate is a flexible and lightweight corrugated roofing material made from fibers of organic origin with impurities of minerals and bitumen. Its service life reaches 50 years. Covering the roof with this material is also quite easy to do with your own hands without the involvement of third-party specialists. The advantages of asbestos-cement slate and ondulin are resistance to acids, fungi and mold, as well as low water absorption. Among the shortcomings, one can single out low resistance to sudden changes in temperature, as well as softening of the material in the summer, requiring special gaskets for fastening.
- Bituminous tiles are a fairly soft material that includes bitumen in its composition. Its laying is also a fairly simple procedure - the tiles are simply glued to a base made of OSB, edged boards or ordinary plywood. This material is manufactured using modern technologies, is highly resistant to climate and temperature changes, and is well protected from decay and corrosion.A coating of basalt or mineral chips is applied to the top layer of bituminous tiles.
Now you know, how to cover the roof of the garage.
Preparation of the rafter structure
After the choice is made, what type of roof will be erected and how to block the roof of the garage, you can proceed to the direct construction of the roof.
The article discusses options for covering a shed garage roof using roofing material and asbestos-cement slate, as well as covering the garage roof with corrugated board.
To equip the rafter system, wooden boards or beams without knots are used, the thickness of which is selected depending on the distance between the legs of the rafters, their length and the total mass of the roof.
The installation of the truss system begins with the laying of the Mauerlat, which consists of special beams installed around the perimeter, on the walls of the garage. The rafters are attached to these beams with spikes inserted into the sockets.
Next, the installation of the extreme rafter legs is carried out, after which the intermediate legs of the rafters are installed with careful alignment.
Important: in order to avoid demolition of the roof in the event of a strong gusty wind, the rafters should be nailed to the walls, having previously attached them with wire ropes to crutches previously fixed in the wall.
To protect the walls from atmospheric precipitation, it is also recommended to arrange a small cornice about 50 centimeters wide along the edges of the roof. When it is attached to the wall, in no case should there be gaps.
As the base on which the roof is laid, either a continuous and random crate or wood flooring is selected.First, the bars are laid in increments of 50-100 centimeters parallel to the ridge, then boards are laid over the bars.
Important: before you cover the roof of the garage, you should make sure that the wood does not have knots and is not damp, as these shortcomings can lead to damage to the roofing.
After the rafter system is completed, the laying of the selected roofing material begins.
Covering a garage roof with ruberoid
When covering the roof of a garage, the roofing material is most often laid on a crate with a three-layer coating applied to it using heated bitumen and a hot mastic filler.
The following materials can serve as a filler:
- pulverized, such as slag dust, gypsum, ground limestone, sawdust, etc.;
- fibrous, for example - asbestos;
- combined in the form of a mixture of pulverized and fibrous material.
Before applying the mixture to the crate, it must be properly cleaned and primed with drying oil with dye. If a wooden crate is used, all possible cracks, pores and crevices should be sealed in it, and the bitumen must be heated before application.
Important: the primer should first be applied across the wood fibers, and then along.
After the primer dries, the crate is covered with mastic and roofing material is laid on it. The second layer of material is laid, slightly overlapping the first layer along the edges, the third - similarly overlaps the second.
Over the entire length of the roofing material being laid, its overlap should be observed and it should be let out by the ridge by approximately 15 centimeters. To avoid the appearance of bubbles and the passage of water, the material should be carefully smoothed when laying.
Covering the garage roof with asbestos-cement slate
Covering a garage roof with asbestos cement tiles is quite quick and easy. The slate is laid on a crate of boards, the thickness of which is 2.5 cm and the width is 10 cm. The cross section of the bars is 6x6 centimeters.
Before proceeding with the laying of slate, the crate should be covered with a layer of roofing felt or roofing material, so that later there is no such situation when the roof in the garage leaks.
Asbestos-cement roof tiles are fairly lightweight and durable, and fire resistant, which has made them the most common garage roof covering material.
There are two types of tiles: frieze and edge. They differ from each other only in mass and area, having the same width of 4 mm.
Even during the manufacture of these tiles, they provide holes for anti-wind buttons used for attaching them to the crate along with roofing nails and staples. Tiles should be laid diagonally, taking into account their thermal expansion.
Wavy slate sheets differ from tiles in their size. They are used together with corners, paws and a ridge for a gable roof. The fastening of such sheets is carried out either with screws or nails, for which holes must be pre-drilled.
Laying slate on a sprinkle is done in horizontal rows, and the sheet laid above should go 12-14 centimeters onto the bottom row.
Covering the roof of the garage from corrugated board
Decking is a steel profiled sheet (profile width is usually 20 mm), with a protective galvanized or polymer coating.
This material has transverse rigidity obtained as a result of rolling of different configurations and heights, as well as additional stiffening ribs that increase resistance to dynamic loads.
Overlapping a garage roof with corrugated board is quite simple, the main thing is to perform the correct laying of sheets depending on the slope of the roof:
- With a roof slope of less than 14º, the horizontal overlap should be more than 200 mm;
- With a slope of 15 to 30 º, the overlap is 150-200 mm;
- With a garage roof slope of more than 30º, the horizontal overlap is 100-150 mm;
- In case the roof slope is less than 14º, the vertical and horizontal overlaps should be sealed with silicone sealant.
The corrugated board is attached to the wooden elements of the roof in the lower part of the wave using special self-tapping screws with a neoprene gasket and a sharp drill. The ridge is fastened with large self-tapping screws in its upper part.
Important: when covering the garage roof with corrugated board, it is imperative to equip it with vapor and waterproofing, as well as leave a gap for ventilation of the space under the roof.
The size of the crate when covering the roof of the garage with corrugated board is selected in accordance with the height of the corrugation of the sheet used and the slope of the roof.
If the slope level does not exceed 15º, then a continuous crate with two overlap waves is performed. If the slope is higher than 15º, then the step of the crate should be 35-50 centimeters.
That's all I wanted to talk about how best to close the roof of the garage, ensuring its strength, reliability and safety. In this case, you can use any materials for the roof, the main thing is to correctly manufacture and fix the rafter system, without forgetting about mandatory garage roof waterproofing, preparing it then for laying the coating.
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