What Is Pitched Roof?
A pitched roof is a type of slopping roof. This type of roof has a slope from one end to the other. In a pitched roof, the slope is usually divided into two parts at an angle from the central ridge. A pitched roof sometimes has a roof in one part.
The slope in a pitched roof is divided by its horizontal span. The measure of stability in this pitched roof is the horizontal span.
Pitched roofs can be used for limited width and general buildings. In which the roof of the building can be properly sloped into the roof.
When the top surface of the roof is slopping, it is called a pitched roof. This type of pitched roof works best in areas with heavy rainfall or snowfall.
Here in this article, we will learn about the pitched roofs, types of pitched roofs, advantages, and disadvantages of a pitched roof.
Introduction to Pitched Roof
The use of pitched roofs for buildings with long spans and irregular plans should be avoided. This is because irregular buildings have to take into account many elements such as valleys, gutters, and humps.
The roof has been a structural component for residential since the beginning of culture.
The roof provides protection to the occupants of the building against adverse external atmospheric and contact conditions. It also provides privacy to those who live in it.
For construction, it is necessary to consider the factors for roof design, among which, gutter line, electrical line, plumbing line, rainwater line, etc. are important in residential construction. Excellent external factors and the use of different roofing materials should be carefully studied for excellent roof construction.
The design of the drainage depends largely on the slope of the roof. Roofs are classified into two categories. Flat roof and pitched roof
In a pitched roof, the roof is held in a slope from one sidewall to the other.
In earlier times, pitched roofs were made using wood. Now designed for pitched roofs in modern times.
This type of roof looks very attractive. The pitched roof is widely used as it gives a decorative effect to traditional and modern homes.
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Types of Pitched Roof
Pitched roofs are classified as follows based on environmental conditions, aesthetic vision, and a number of slope surfaces.
- Mono-Pitch Roof
- Double-Pitch Roof
- Couple Roof
- Couple Close Roof
- Collar Beam Roof
- Purlin Roof
1. Mono-Pitch Roof
Mono-pitched roofs, often referred to as pent roofs, shed roofs, lean-to roofs, and skillion roofs (in Australia and New Zealand).
This type of roof has a single slope surface. Which is not attached to the second roof. This roof is in contrast to the dual-pitched roof.
The construction of a mono-pitched roof gives the concept of a single roof. The mono-pitched roof does not need to be attached to any other roof.
This type of roof differs from other traditional roofs. Mono-pitched roofs usually have different pitches and slope in different parts of the roof.
It is entirely possible to create a mono-pitched roof style by creating more than one roof style to give a decorative effect. This type of roof construction is also known as split mono-pitch roofing.
Moreover, homeowners can give a new look to this type of roof by adding a little to their existing roof.
2. Double Pitched Roof
A double-pitched roof is a roof used in traditional and general buildings. This type of roof is the most popular. We most commonly refer to a double-pitched roof as a triangle. A double pitch roof has two sloping roof surfaces connected to the ridge at the top.
The ends of the two surfaces of the roof are supported by load-bearing walls, forming a triangular shape at the end. Which has been named Gable. These types of gables have windows installed on the roof to allow natural light to enter.
Double-pitched roofs can be classified as symmetrical and asymmetrical in two parts. In the first option, the slope side of the roof is kept the same. In the second option the slope of the roof is higher on one side and lower slope on the other side.
3. Couple Roof
The upper part of each pair of rafters is connected to the common ridge. And its lower end is installed on the outer wall.
Such roofs are not taken into much use. Because it spreads outwards. This type of roof tends to go out by supporting the wall plants. Because of this, it is advisable to use a couple of roofs only when the span is 3.6 meters in length.
4. Couple Close Roof
The construction in this type of roof has the same shape as the couple roof. But in this type of roof, the end of the pair of rafters is fixed with a tie beam.
The function of this tie beam is to prevent the rafter from spreading and going out of the wall. This is because the tie beam is attached to the legs of a common rafter. These ties are fixed with a nail on the rafter.
The tie beam is also nailed to the wall. These tie beams can be made from wood or steel.
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5. Collar Beam Roof
When the length of the span is high or when the load is high, the couple rafter tends to bend downwards. This is avoided by erecting a tie beam in such a place. This tie beam is held from the wall to a third of the height. The beam raised in this way to support the rafter is known as the collar beam.
The design of the collar beam roof is similar to a couple of closed roofs. One difference in collar beam roof is that the collar beam is provided at a vertical level.
A Coller beam roof can be used up to 5 meters. Up to 5 meters collar beam roof can fully support.
6. Purlin Roof
Purlin is a longitudinal, horizontal, structural member to support a roof. Traditionally, wood material was used as a purlin in building construction. There are three main types of purlin. Purlin plate, main purlin, and general purlin.
Purlins are used in steel frame construction. Such steel purlin can be painted or greased to protect it from external factors.
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Advantage of Pitched Roof
The various advantages of the roof are as follows.
Safety Against Environmental Hazards
Due to its triangular shape, it can withstand extreme weather conditions, including external factors such as heavy rainfall and snowfall.
The shape of the pitched roof helps to remove water directly as it is sloping.
Thermal Effectivity
Pitched roofs provide natural ventilation. As a result, the thermal efficiency of the building can be significantly improved.
This provides the best atmosphere during the winter and summer seasons.
Energy Savings
Ventilation is placed on the pitched roof in the construction of the building. So that the air in the building is fresh.
Longer Life
Flat roofs require constant maintenance for their drainage to avoid leakage.
While a pitched roof does not require a drainage system. And that’s why repairs cost less.
Decorative Effect
A pitched roof can be given a decorative effect. A pitched roof makes it easy for an architect to make a beautiful design.
Also Read: Cantilever Beam | Advantages of a Cantilever Beam | Disadvantage of the Cantilever Beam
Disadvantages of Pitched Roof
Some of the disadvantages of the pitched roof are as follows:
- It is not possible to use pitched roofs for buildings with complex plans.
- Architecture in pitched roofs cannot give a new perspective use to the roof.
- The pitched roof emphasizes the walls of the building. These walls require foundation depth as needed.
- This type of pitched roof takes more time to install. In addition, it costs more to maintain.
- The pitched roof must be inspected periodically.
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