What Is The Frame Of A Roof Called?

What is the cheapest roof style?

Asphalt Shingles Pros: Asphalt is available in a variety of colors, is easy to source, and is the most affordable roofing application of them all.

Cons: Asphalt doesn’t last as long as roofing materials, doesn’t provide the same kind of insulation as others, and the quality can vary..

Why is roof triangular?

A triangular shaped structure or peak is created on the side or facing the front. … Because of its triangular shaped slope, it allows rain, leaves and any other remains or weather damage to fall off the roof an away from the structure. Pitch and steep grades makes gabled roofs different from each other.

Is the roof part of the structure?

(b) any component (including weatherproofing) that forms part of the external walls or roof of the building; The insurer defines Structural works as: Structural Element: any component or part of an assembly which provides necessary supporting structure to the whole or any part of the building.

What is the triangular part of the roof called?

A gable is the generally triangular portion of a wall between the edges of intersecting roof pitches. … One common type of roof with gables, the gable roof, is named after its prominent gables.

What is the difference between roof trusses and rafters?

Trusses and rafters have many common parts including the sloping rafter boards and a bottom joists that form the ceiling of the space below. The major functional difference between the two is that trusses are built mostly with 2x4s in place of the wider dimensional boards.

What is the main roof beam called?

A collar beam or collar is a horizontal member between two rafters and is very common in domestic roof construction. Often a collar is structural but they may be used simply to frame a ceiling. A collar beam is often called a collar tie but this is rarely correct.

What are the top tiles on a roof called?

Eaves (or Top) Tiles Short tiles used in a single course to give a double course of tiling at the eaves. A single course of short tiles is also used both sides of the ridge.

What is a roof made up of?

This group includes shingles made of various materials, tiles made of baked clay or slate, and corrugated sheets of steel, aluminum, lead, copper, or zinc. Flat roofs are normally covered with roofing felt and tar, while sloped roofs are generally covered with shingles or sheet metal.

What are the parts of a roof called?

Parts of a roofDecking (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.More items…

What are roof supports called?

Roof raftersRoof rafters are the main supports of a roof. The sloped edge of a roof over a wall is the rake. The squared-off end of a sloped roof is called the “rake.” The ridge is the horizontal peak of the roof.

What are two types of roofs?

Here is a list of 9 different types of roofing to consider for your next re-roofing job:Solar tiles. … Asphalt shingles. … Metal roofing. … Stone-coated steel. … Slate. … Rubber slate. … Clay and concrete tiles. … Green roofs.More items…

What is the most durable type of roof?

The 5 Most Durable Roofing MaterialsAsphalt Shingles. One of the most common and popular roofing materials, asphalt shingle roofing is highly favored because of how cost-effective it is without compromising protection. … Metal. … Clay Tile. … Wood Shake. … Slate.

What is the least expensive roofing material?

Out of all of the many types of roofing materials available to you, the asphalt shingle is the cheapest. It will cost around $1.00 per square foot for the shingles, making it possible to do an average, single-story home for under $2,000.00. They are also the most popular on the market today.

What is a 4/12 pitch roof?

Roof slopes are most commonly defined by the rise-over-run ratio. If a roof slope “rises”, say, 4 inches when measured 12 inches along the bottom of a horizontal roof truss, the roof slope is said to be 4:12; i.e., 4 inches of rise per 12 inches (one foot) of run.

What is the basic structure of a roof?

It consists of rafters and trusses, which are beams that form the shape of the roof and support the sheathing or the next layer. Drainage features are also established during the roof structure phase. These features, like the roof’s shape, layout and slope, are important because they allow water to roll off the roof.

What are the 3 types of trusses?

Most Common Types of Roof TrussesGable Trusses. A variety of the trusses shown above fit into the common or gable truss category, including the King Post, Queen Post, Howe, and Double Howe trusses. … Hip Truss. … Scissor Roof Truss. … Attic Truss. … Mono Truss. … North Light Roof Truss. … Flat Truss. … Gambrel Truss.More items…•

How do you calculate roof members?

Calculation set outRafter run = external width between the wall plates divided by two.Rafter span = rafter run divided by cos °.Overhang = eaves width divided by cos ° (add dimensions for brick veneer).Ridge strut = rafter run times tan °.Decide whether an underpurlin is needed; if it is place it at mid-span.More items…