Table of Contents
Roof plane: This is the surface of the roof. It is flat, but pitched or on an angle. It is also called the field of the roof. Ridge: This is the top or peak of the roof, where two roof planes meet.
What are the parts of a roof structure called?
The rafters A rafter is a key structure in a roof, along with purlins and joists. Together, they make the framework of the roof. If you imagine your roof with no tiles or covering on, the rafters are the pieces of timber that slope vertically from the top down to the eaves.
What is the apex of a roof called?
Ridge. The apex of two slopes on a pitched roof.
What are 5 parts of the roof frame?
These five components include the roof covering, sheathing, roof structure, flashing and drainage.
What are the things on roofs called?
Snow guards or snow brackets are roof-mounted metal “spikes” installed by your roofing contractor and designed to hold large amounts of snow in place and prevent them from falling in one big chunk.
What is the overhang of a roof called?
What Is a Soffit? Your roof by necessity, will often times extend over the walls of your home. This overhang can go by a few names, such as the house eaves or the rafters of your roof. The underside of this overhang, when given a finished appearance, is known as the soffit, which means “something fixed underneath”.
What is the top point of a roof called?
Roof Ridge: The roof ridge, or ridge of a roof is the horizontal line running the length of the roof where the two roof planes meet. This intersection creates the highest point on a roof, sometimes referred to as the peak.
What is a roof purlin?
In steel construction, the term purlin typically refers to roof framing members that span parallel to the building eave, and support the roof decking or sheeting. The purlins are in turn supported by rafters or walls.
What is a roof frame?
The roof framing is the structure that supports your roof. The main decision that needs to be made with erecting a roof is which material to use for its construction: timber or metal.
What are the different types of roof framing members?
The most commonly used types of pitched roof construction are the gable, the hip, the intersecting, and the shed (or lean-to). An example of each is shown in figure 2-1.
What is a roof framing member?
member of the roof frame. The point at which all the rafters are attached to. • Transfers the load of the roof. through the rafters to walls below.
What are those metal things on top of roofs?
When snow guards are attached to a roof they basically look like a shoe cleat upside down with projecting pieces of metal or plastic. This projecting pieces of metal or plastic, snow guards, are what stop the snow from sliding off of a roof.
What are the square things on my roof?
The melting snow re-freezes when it reaches the overhangs of your roof where there is no warm air from your house to continue melting the snow, causing an ice dam to form higher and higher. Apr 20, 2021.
What are the metal things on top of buildings?
A finial or hip-knob is an element marking the top or end of some object, often formed to be a decorative feature. Smaller finials in materials such as metal or wood are used as a decorative ornament on the tops or ends of poles or rods such as tent-poles or curtain rods or any object such as a piece of furniture.
What is the space between ceiling and roof called?
Attics are the space between the roof and the ceiling of the highest floor of the house. They’re usually full of insulation, and sometimes heating or air conditioning equipment as well.
What is the difference between a soffit and an eave?
The underside of the eaves is referred to as the soffit. The difference between the two is that the underside of the soffit is the only part of the roof that overhangs the wall.
What’s the difference between soffit and fascia?
An exterior soffit is located on the span beneath the rafter tails, while the fascia is the exposed horizontal band you see at the end of the rafters. These architectural elements found along the eave area do more than just add visual interest and give a finished look to your home.
What are the areas of a roof?
Parts of a roof Decking (or sheathing) Usually made from 1⁄2-inch plywood, the decking closes and reinforces the roof structure and provides a nailbed for the shingles. Roof edge (or eaves edge) All the boards running along the edge of the roof or eaves. Attic. Saddle. Ridge. Valley. Underlay membrane. Eaves membrane.
What is the purpose of roof purlins?
Purlins provide additional support for the roof: They create a horizontal “diaphragm” that supports the weight of your building’s roof deck – whatever material you use for the roof itself. They also help make your entire roof structure more rigid.
What is the purpose of a purlin?
Purlins are horizontal beams that are used for structural support in buildings. Most commonly, purlins are major components of roof structures. Roof purlins are supported either by rafters or building walls and the roof deck is laid over the purlins.
Do roofs need purlins?
These are most commonly used in metal buildings, but in wood-frame structures, these also replace closely packed rafters. A roof’s purlins support the roof Deck’s weight. Purlin is necessary as there is no frame for the sheeting on the roof to rest on without it, thereby making purlins important to the roof structure.
What is a timber roof frame?
Timber Frames The purpose of a roof frame is to provide a structure that spans the walls of the building and supports the roof covering. The roof frame also assists in bracing the structure from wind forces from various directions.
How do you calculate roof frames?
For example, if the slope is 4 in 12, and the run is 12 feet, the ridge beam height (M) will be 4 feet. The finished ridge beam height (Z) above the top of the wall will be (M) plus the Y Height. The formulas are: M = (R * X) / 12.
What are the common roof framing elements?
One of the most important parts of building a sturdy roof is the initial roof framing plan. Roof framing simply describes how a group of rafters and beams are fitted or joined together in order to provide support for the roof covering.Measuring and cutting the rafters for the frame Plumb cut. Bird’s mouth cut. Tail cut.
What are the two most common methods for framing a roof?
There are two common ways of framing the roof of a house: with premanufactured trusses, or with rafters and ceiling joists, commonly called stick framing.
