Hip roof: a simple design for 4 slopes

Such a four-slope structure can be erected independently.
Such a four-slope structure can be erected independently.

A do-it-yourself hip roof is more difficult than a gable roof - after all, the design includes much more nodes. But having understood the details, it is quite possible to build such a roof. To do this, it is necessary to correctly calculate the main parameters of the roof, select the appropriate materials and assemble the frame, taking into account all the requirements for its strength and configuration. This is what we'll do.

Basic roof units

The hip roof will look good on buildings of a large area
The hip roof will look good on buildings of a large area

To understand how such structures are built, you need to understand what a hip roof is in principle.This variety includes hipped roofs, which are erected over rectangular buildings. Unlike gable structures, not vertical triangular gables are built at the ends of the building, but inclined hips.

The internal structure of the semi-hip system
The internal structure of the semi-hip system

There is also a half-hip construction (it is also Danish or Dutch). In such roofs, the lower part of the pediment is represented by a vertical trapezoid, and the upper part by an inclined semi-hip.

Scheme showing the main elements of the supporting frame
Scheme showing the main elements of the supporting frame

The configuration of such a roof due to the design of its truss system:

  1. Rafters (sometimes called corner) the lower ends rest on the corners of the building, and the upper ends are attached to the ridge. It is they who set the entire outline of the roof, forming slopes along the long sides and hips along the short ones.
So with the help of slanted rafters, a diagonal hip is formed from each of the ends of the building
So with the help of slanted rafters, a diagonal hip is formed from each of the ends of the building
  1. Intermediate rafters connect the upper edge of the wall (or the Mauerlat laid on it) with a ridge beam. On the hips, one intermediate rafter is usually placed, on the slopes - several pieces, in increments of 0.5 to 1 m.
  2. Narozhniki - short rafter legs that form the planes of the slopes and hips at the junction with the rafters. The lower part of the leg in this case rests on the Mauerlat, and the upper part is attached to the rafter plane.
Scheme of fastening sprockets to slanted rafters
Scheme of fastening sprockets to slanted rafters
  1. ridge beam hip roof turns out to be shorter than in gable structures. They are used to tie all the rafters at the top into a single system.

Additionally, the entire system can be reinforced with racks and struts, thanks to which the hip roof will gain additional strength and rigidity.In addition, vertical posts are usually used as a wall frame when equipping rooms in the under-roof space.

The hip roof allows you to arrange a small attic: there will be enough free space under the slopes
The hip roof allows you to arrange a small attic: there will be enough free space under the slopes

Construction technology

Roofing materials

As I noted above, the hip roof may well be built independently. But in order for its frame to be reliable, it is necessary to select materials with sufficient bearing capacity.

Read also:  Hip roof calculation: main characteristics and design, determination of the total roof area
For preliminary design, you can use ready-made drawings with affixed dimensions.
For preliminary design, you can use ready-made drawings with affixed dimensions.

As a rule, the parameters of the rafters are calculated based on such parameters as the area of ​​\u200b\u200bthe base of the roof, the height of the ridge and the angle of inclination. But to reduce labor costs, you can use the ready-made figures given in the table:

Illustration Element / material for manufacturing
table_pic_att14926250317 Mauerlat.

Pine beam from 100x150 mm.

table_pic_att14926250328 Sloping rafters.

Pine board 50x150 or 5x200 mm.

table_pic_att14926250349 Intermediate rafters and rafters.

Pine board 50x150 mm.

table_pic_att149262503710 Racks, struts, puffs and other details.

Timber 50x100 or board 50x150 mm.

 Crate.

  • timber 40x40 or 50x50 mm;
  • board with a thickness of 30 mm;
  • plywood or oriented strand board (OSB) from 20 mm.
table_pic_att149262504212 Metal pads to reinforce connections.
table_pic_att149262504413 Fasteners.
  • studs 10-15 mm for Mauerlat;
  • self-tapping screws;
  • staples;
  • nails.
 Impregnation for wood.
 Roof waterproofing membrane.
table_pic_att149262505016 Thermal insulation material.
table_pic_att149262505217 Roofing material:
  • metal tile;
  • bituminous tiles;
  • corrugated board, etc.

Since the hip roof truss system is the basis of the entire structure, the materials for it must be selected very meticulously.Wood for rafters, ridge and other elements must be dry, even, without damage and wormholes. In addition, after the purchase, it must be dried and then treated with penetrating impregnations that will prevent the material from rotting.

We must treat the wood with an antiseptic - so the roof frame will last many times longer
We must treat the wood with an antiseptic - so the roof frame will last many times longer

As for insulation, it is highly desirable - a large area of ​​\u200b\u200bthe slopes leads to increased heat loss. As a heat-insulating material, I would recommend using mats based on mineral (basalt) wool. Yes, their price is quite high, but low thermal conductivity and good vapor permeability make the investment justified.

We make hip roof rafters

Do-it-yourself roof is built according to standard technology: first a frame is made, then it is insulated and waterproofed, and then roofing material is laid on top of the waterproofing. But if all finishing operations are performed according to standard schemes, then there are some peculiarities in the construction of the frame.

How to make a truss system - I will tell and show in the table:

Illustration Stage of work
table_pic_att149262505919 Mauerlat installation.

We lay a wooden beam impregnated with an antiseptic on the upper part of the load-bearing walls.

We put a layer of roofing material or a waterproofing membrane under the timber.

For fixing, we use either anchors or threaded studs, which we first embed into the masonry.

table_pic_att149262506020 Installation of a ridge run.

On vertical racks we fix the ridge beam.

We fix the structure with diagonal rafters from the side of the hips. The angle of inclination of the rafters must correspond to the angle of the roof slope.

table_pic_att149262506221 Installation of sloping rafters.

We carry out the installation of diagonal rafter legs.To do this, we attach the lower edge of the board to the Mauerlat at the corner, and fix the upper edge on the ridge beam using metal plates.

table_pic_att149262506422 Installation of intermediate rafters.

We align the rafter legs, set them with the selected step and fix them on the Mauerlat.

We cut off the upper edges of each rafter and fix it on the ridge run.

table_pic_att149262506523 Installation of sprockets.

We also fix the short rafters on the frame: put the lower part on the Mauerlat, cut off the upper part diagonally and adjust it to the plane of the rafter.

In the photo - a frame of a hip structure, ready for installation of the crate
In the photo - a frame of a hip structure, ready for installation of the crate

The finished truss system of the hip roof serves as the basis for further work - installation of the batten, insulation, waterproofing, etc.

Conclusion

The hip roof has its own characteristics, primarily due to the design of the frame. These features must be taken into account in the design, and in the selection of material, and most importantly - in the construction of the roof.

The video in this article will help you figure out the details, in addition, you can always get advice from experienced roofers by asking a question in the comments.

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