Crate and waterproofing under the metal : the device and installation

Metal - is the most in demand among all roofing material analogues that offers construction market.The popularity of this coating is explained by the fact that it has a number of positive performance.They are relatively low cost, durability and ease of installation.The material for the production of such a floor is galvanized steel with polymer coated on both sides.In this article we will look at the main points concerning the laying waterproofing metal roofing.

Features constructions

basis forroofing metal tile is a crate.This structure is designed to evenly distribute the weight of the roofing trusses on the system and bearing walls.Availability batten provides the functionality of the roof, protecting the wall of the house from destruction.
Crate under the metal may be made of such materials:

• plywood flooring;
• OSB plates;
• planks of wood.

Depending on the frequency of mounting parts batten structure is divided into the following types:

• thin type;
• solid look.

piece design helps prevent roof deformation under load.Therefore, the frame, laid a solid method is used for the soft roof.Option rarefied crates more suitable for metal roofing.Profiled steel, which coating is made has a high strength to withstand all possible loads during operation and is not subjected to deformation.

deciding whether a waterproofing metal roofing needs, and it is worth considering the fact whether the heated room under the roof or not.If this is supposed to heating the space, in addition to the need to build waterproofing kontrobreshetku.This design will facilitate removal and venting of steam from the heater structure.Unless you plan to heat the room under the roof, it would be enough to lay on the rafters waterproof tape.

Criteria for selection of the material

When selecting raw materials for the frame construction should take into account certain characteristics of materials:

1. boards for construction should be the thickness from 25 mm to 32 mm.
2. When choosing materials should focus on the rafter pitch distance.For example, if the space between the rafters is 0.9 cm, while the thickness of the boards should be more than 32 mm.With a smaller distance and accordingly choose thinner boards.
3. To waterproofing under metal roofing lasts a long time, should take into account the difference in thickness between the boards.The indicator must not exceed the mark of 2-3 mm.If this value is greater, there is a possibility that the board will not be able to attach rafters during laying.This in turn will result in uneven mounting surface.Therefore it is better to refrain from buying the material with a deviation from the given index.
4. board width should be 10-15 cm. It is desirable that the length was the size of a multiple step rafters, but it is not a prerequisite.Boards can be of different lengths, but in this case, after cutting will be less waste.
5. Remember that buy planed board is not required.The cost of this material is quite high.It fit the standard material that has minimal differences in terms of thickness.Before you begin the installation process, you must crate impregnate antiseptic composition to protect the structure from decay and fire.

Installation obreshetochnoy design

under metal roofing waterproofing layer is laid, which is fastened to the rafters by a staple gun.The purpose of this layer is to protect the structure from the adverse effects of moisture due to condensation.He's going on the inner surface of the roof as a result of temperature fluctuations.Under the influence of moisture wet insulation that reduces its insulating qualities.In addition, as a result of moisture occurs rotting crates, freezing of the roof and the appearance of mold.To protect the structure from destructive phenomena should make such steps:

1. Since the lower portion of the roof, it is necessary to lay overlapping anti-condensate film.The width of the bed should be about 10 cm.
2. Then you need to put on the counter-rafters.You can use the whiteboard 30h100 mm or section bars 30h55 mm.The bar or the board should not be brought to the overhang, leaving a distance of 15-20 cm.
3. necessary to avoid the appearance of protruding fragment on the edge of the eaves.To this end, the thickness of the first board to be more than in the subsequent element is 10-15 mm.Stated step crates under the metal structure will allow a firm foothold on the ground.
4. first timber should be fixed to the ends of the rafters along the entire length of the overhang.It is necessary to ensure that fixation was performed in a straight line and does not go beyond the eaves.
5. Next to the primary board is necessary to fasten the metal bar to the eaves and vertical board.This should be done with screws.The step size between the 1st and 2nd boards should be 5 cm less than the spacing between elements which are then stacked.The space between the following fragments spade should match the length of the step profile mounted tiles.Since the installation is carried out on all design boards.

Important! To see how to choose the right step away, which is located between the board and the subsequent fragment of the cornice, you must perform these steps:

• put two boards, which must be arranged in parallel in relation to each other;
• laid on top of a sheet of tiles;
• layout boards must be equal portion of tile fixing.In this case the resulting makeshift ledge should contribute to the necessary water flow;
• eaves if the size is greater than is required, the flow of water will overflow through the gutter.Otherwise, the water will flow to the front wall between the board and the groove.

1. At the end of batten installation, the next step will be the installation of the end plates and the ridge board.For the strength of such strips to be added to nail boards section 25h100 mm.Mount they need in a place of fastening of the ridge.
2. Lay the first sheet of tiles needed so that the edge to 30-40 mm advocated the bar cornice.This water from rain and snow will soon fall into the gutter without penetrating under the coating.
3. At the junction of pipes, windows or attic ridge lath need to lay a solid deck.In the area of ​​the ridge width of the board can be made greater, since here in addition to the edge of the profiled sheet must be fixed and the metal profile.

Rules step calculation

There is a recommended step size crates, which is 350 mm.This distance allows you to mount the cover sheets in the bottom of the wave.However, this figure is not universal.To determine the correct steps will help Dean following rules:

1. space between the boards depends on the type of roof.This value is determined by the distance from the bottom of the first board to the upper portion of the next.
2. addition to roofing type in the calculation should take into account other factors determining step crates: the value of the eaves, roof slope, the parameters of the gutter.
3. If the setting of the drain, to the ledge you need to add at least 3 cm. For example, if the trough diameter of 9 cm, it is necessary to make a projection of the same size.And with a diameter of 12 cm - a little more.
4. projection value is calculated from the front board.In the absence of such an element, the calculation must be done by cutting the rafters.For the necessary drainage rate projections should be determined depending on the angle of the ridge.The smaller this angle is, the greater value should be the protrusion.On the basis of these parameters is determined by step calculation.
5. make calculations using a level of up to 1.5 m. To measure should be space between the upper part of the first wave and the bottom-edged tiles.Then the rafters put on the label level.This figure is equal to the level of the board mounting.
6. first board should be slightly thicker than the other, to support the weight of the roofing material.The remaining fragments of the nail should be in accordance with the markings, which must be applied in two rafters, given the magnitude of the roofing profile.

Install downspout

Moving on to the next phase of work to be done such manipulations:

1. to the vertical board fasten trough to wastewater.
2. mounting brackets gutters must be installed before the installation of metal.It is recommended to mount the wave width of the tile, keeping a distance of 50-60 cm. Fixing takes place on the bottom board batten.
3. installation process should begin with fixing the two outer brackets.The result should be a slope of 5 mm per meter length.
4. further between the two bindings must pull the rope that will implement the auxiliary function when installing the remaining brackets.
5. then set the gutter and eaves after the bar.

Conclusion

reliability and durability of the roof depends on the substrate.To ensure the quality of the coating, evenly distribute the weight and prevent the destruction of the house, before installation of roofing material you need to install waterproofing and crate.The process of installation of this design is straightforward and does not require skilled training.After reviewing the workflow rules can be mounted crate, without the services of specialists.

in movies, you will see what is under the metal crate and how to fix it: