A roofing joist is a horizontal member that runs across an open space.
Roofing material on roof joist.
They are nominally 2 inches thick actual width usually 1 1 2 inches and come in a variety of widths from 8 to 12 inches.
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Depending on the construction they may lie flat or be pitched.
This structural support comes in the form of roofing joists ceiling joists rafters or trusses and can be made from a variety of materials including wood metal reinforced concrete etc.
You could use fewer joists with concrete but maintain the standard regardless of the material being used.
Joists are traditionally made from timber.
However in canada the most common material used in residential framing is wood so that is the material we will discuss here.
They can be concealed or exposed and there will be more joists than beams.
Most roofs will be sheathed in plywood at least 3 8 inch thick.
Just because one material may be stronger than another doesn t mean the spacing changes.
Joists attach to beams lying parallel to each other and being aligned horizontally.
The primary roof covering on houses in north america are asphalt shingles but some have other types of roof shingles or metal roofs.
The roofing material is primarily designed to shed water.
Roof joists generally join opposing walls and support the ceiling below and or the floor above.
The most common metals used are aluminum lightweight steel and zinc.
Copper metal roofs are a beautiful but costly specialty.
The covering is also a major element of the architecture so roofing materials come in a wide variety of colors and textures.
A roof joist can be made from wood metal concrete and a variety of other materials as long as the material is strong and very sturdy.
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Joists are the parallel horizontal beams that run across an open space joining opposite walls in a building to support both the ceiling below and the floor above.
The manufacturing processes allow for a variety of appearance options including the traditional metal roof style and roofing made to look like shingles shakes and tiles.
Roof joists can be made of wood metal concrete or any number of materials.
