In this article we will deal with a half-hipped roof. What it is, what elements it is assembled from, let's talk about the technology of erecting a roofing structure of this type, consider its advantages and disadvantages.
To begin with, the half-hinged version is subspecies hip roof structure, which is a four-sided roof. It has two trapezoid stingrays, two triangular (isosceles).
It received its name polupalmovaya only because of the fact that its triangular rays have inferior. They are shortened by the gables of the house. It is the latter that play an important role in the construction of the half-gummed roof. Because they pre-erect the pediment, and already under it they adjust the roofing structure. That is, they do not build a roof first, and then form its gables.
There are two ways to build gables of a building:
of wall material;
in the form frame construction , which is part of the roof.
Both are used everywhere today, but statistics show that the former is more common. The thing is that it is easier to erect a roof, plus gables or brick gables - these are reliable building structures that serve as supporting walls in attic rooms.
You can’t even call a simple half-halt roof in terms of its calculation, design, and in terms of its assembly. But thanks to its structure, it is the owner of residual serious advantages over other roofing structures.
A large space forms under it where it is possible to organize an attic.
The presence of the gable makes the construction warmer , especially if this building element is constructed of brick or blocks.
On the gable, you can install windows or a door with exit to the balcony.
A smaller area of slopes than the same hip structure, which reduces the cost of building the roof.
As for the minuses. The most significant drawback is the complex structure, which includes a large number of different elements, and hence a large amount of lumber, as well as fasteners. Complex construction is a complex and time-consuming installation, which requires knowledge and experience of construction.
On our website you can find contacts of construction companies that offer services design and repair of the roof . Directly to communicate with representatives, you can visit the exhibition of houses "Low-rise Country".
Purely constructive roofing of this type is a pitched structure. So, it can be used as a hanging and naslon rafters. They differ from each other in that the slats abut the ridge girder, which hang in each other. Often use the first option, because the ridge beam performs the functions of support, on which the truss legs of the system rest. That is, this design is much stronger.
So, we assume that the gables were built of brick or blocks.
The two outer walls (front and rear) are fitted with a mauerlat from a bar with a minimum section of 100x15 mm. It is attached to a reinforced concrete belt filled with concrete, in which a framework of steel reinforcement is laid. Fastening is carried out on the studs laid in the armored belt every 1-1.2 m. . Its length is 3-4 meters shorter than the span of the building. Installation is carried out on the rack-support, installed or on the supporting wall, located inside the house, or on the floor beams, or on the floor slab. Strong support is important here.
A ridge bar is mounted on the racks , which is attached to the first perforated steel corners and screws. The main requirement is horizontal running. Therefore, even at the stage of installation of support columns, they must be checked for verticality and height.
Spend mounting diagonal rafters , which at one end abut the edges of the ridge girder, second to gables. These rafter legs delimit the slopes (trapezoidal and triangular) between themselves.
Lay the main rafters that form trapezoidal ramps. They rest against the upper edges of the ridge bar, lower edges into the mauerlat.
Spend assembling helper .These are short truss legs that, with their upper ends, rest against the diagonal ribs of the roof structure.
Similarly, the slopes of a triangular shortened shape are filled. In each of them, one of the rafters is full, it rests on the ridge girder, and the rest are rifles.
This is a typical diagram of the truss system of the mansard half-hinged roof. If the span of the roof of the house is large enough, then a number of additional elements are added to the scheme:
intermediate span under the rafters, which are mounted on racks;
or racks themselves without a run , which are mounted under each rafter;
ramp is the supporting element under the diagonal ribs.
Since the talk is about a half-hinged mansard roof with a truss system assembled according to a typical design, it is necessary to designate that the roof will have to be insulated. How it is done:
The trussing system is laid with a steam barrier . Laying lead from the bottom up, that is, from the eaves of the roof to the ridge with overlapping edges of strips in the amount of 10-15 cm. Attach the insulating material to the rafter legs with carnations with a wide hat or staples using a stapler.
Install the counter lattice over the rafter. These are wooden bars with a section of 50x50 mm, which are laid on the rafter legs along. Fastening - screws, whose length is twice the thickness of the bars.
Spend mounting of the batten , the pitch of which elements depend on the type of roofing. If a soft roof is to be laid on the roof, the crate should be solid, either from boards, or from sheets of plywood or OSB.
The last stage outside the roof is laying of the roofing material .
It might be interesting! In the article on the following link read about how the roof is made of corrugated .
The remaining operations are transferred to the attic under the roof structure. In the first place between the rafter legs lay insulation. In width, it should be slightly larger than the distance between the rafters. The reason is that the heat-insulating material enters with tension, leaving no gaps and cracks, which in winter will become cold bridges. After that, roll waterproofing is applied along the truss system. Its installation is performed in the same manner and in the same sequence as the upper insulation layer.
In principle, on this we can assume that the gable semi-hinged roof of a two-story house is built. It remains only to finish the attic, with the laying of communication networks into it.
In principle, assembling a wooden frame gable in the form of a wooden frame in a house with an attic and a half-hinged roof is not a problem. To do this, you must first determine the shape of the gable wall. Usually it is a trapezoid. So, it is necessary to form the perimeter of this figure.
On the supporting side wall of the house along the power plate set up the stands . Their length is different. Therefore, the supports are mounted so that they with their upper ends create a broken line.
At their upper edges cant or a plank 50 mm thick is laid.
Racks between each other are tied with stubs , struts or horizontal slats.
After finishing the construction of the roof, the gable is sheathed with boards or with plywood, you can use OSB. Be sure to carry out insulation.
The video shows in stages how a half-hinged roof was constructed with a frame pediment:
Pay attention to the photo below, which shows the roof, which belongs to the category of "half-hinged", only its shape is slightly changed. In fact, the hip ramp and pediment were reversed in it. The first fell down, the second rose above it.
Purely constructive changes are present, especially in the roof truss system. But in operational terms there is no change. This is still the same attic roof, under which will organize the living quarters.
As for the truss system, as in the previous case, the ridge girder is installed and Rafters of the main roofs are mounted on it. Then a triangular gable is constructed. And already from them are laid under a slope rafter legs and hips hips.
Please note that in this construction the gable is erected in the form of a skeleton sheathed on both sides. No brick or blockwork.
In the video you can see the features of the construction of a half-folded roof:
It might be interesting! In the article the following link read about project house with a wavy roof .
Today, architects offer a large number of typical houses with half-halogen roofs (truss systems with drawings are necessarily attached), from which you can choose a decent option. The variety of projects is actually so huge that you rarely find two identical houses in the same village. So you can safely choose one of these. And if there is free money, then order an individual project, which will differ significantly from everyone.