Roof Members Terminology

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Roof members terminology.

A condition where both the top and bottom chords extend beyond a support structure with no bearing at the extended end. They do for the roof what the joists do for the floor and what the studs do for the wall. Flashing is found in valleys and at the bases of chimneys walls roof vents and plumbing vents. The edge of a roof which runs from eaves to ridge at a gable.

When working on a roof it pays to be familiar with these terms. It is a type of resistant moulding that prevents water flowing near roof openings from infiltrating the roof. 2 part of a flat roof structure that receives the ends of the flat roof joists. Below are some commonly used terms that identify parts of a roof and types of roofing.

A low slope or flat seeming roof covered with alternating layers of roofing felt and hot mapped asphalt and topped off with a layer of gravel. Rafters are inclined members spaced from 16 to 48 inches apart. Made of fibreglass and asphalt shingles protect the roof from rain and lend a house character. Post a question or comment about roof framing support construction specifications practices.

Collar ties rafter ties structural ridge beams. Common rafter valley rafter valley jack rafter hip rafter hip jack rafter cripple jack rafter dormer rafter. Slight vertical cut on the outside edge of truss bottom chord to make sure uniform nominal span typically 1 4 inch cantilever. Fascia the vertical board secured to the ends of the rafters under the lower end of the roof to which the guttering is normally fixed traditionally timber nowadays usually upvc.

1 part of a pitched roof construction that receives the feet of the spars sp ars and ceiling joist ends. The exposed end of a shingle. Here is a closer look at common roofing terms. A horizontal member that establishes the lower edge of a truss usually carrying combined tension and bending stresses.

It is a waterproofing layer made of regular felt stacked above the solid. Occurs where overlapping materials are seamed sealed or. Don vandervort hometips. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load.

Eaves the area just below the lower end of the roof includes the fascia soffit and guttering. That part of a roofing waterproofing or flashing component that overlaps or covers any portion of the same or. They vary in size depending on their length and spacing. 3 part of a suspended timber floor construction that provides a level bearing and.

An asphalt based roof cement formulated to adhere overlapping plies or asphalt roll roofing. As you can see in the illustration below roofs have hip rafters ridge boards jack rafters and more. The members making up the main body of the framework of all roofs are called rafters.