Such roofs are built with mostly timber take a number of different shapes and are covered with a variety of materials.
Roofing construction parts.
The use of a membrane is typically required a waterproof membrane a sweat sheet or vapor barrier with the underlayment paper serving the triple function.
In 80 of residential houses shingles are made of asphalt or asphalt composition materials.
Also known as a fascia.
There are several types.
This layer covers the rafters and is beneath the shingles and membrane layers.
A roof is part of the building envelope.
Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates.
The construction of a typical roof overhang eave or soffit is shown in our sketch.
The characteristics of a roof are dependent upon the purpose of the building that it covers the available roofing.
See wood roof sheathing underlayment also see insulation inspection improvement.
Sheathing is a layer used as the base of the roof.
Finally the exterior layer exposed to the elements wind rain snow hail is the shingle layer.
Parts of a roof the main structural parts of a roof are ceiling joists ridge board jack rafter hip rafter common rafters creeper rafters raking plates out riggers and noggings or last rafter overhang.
Underlayment the underlayment of a roof is the black paper that s laid over the plywood sheeting in order to seal the roof from damaging elements snow rain ice etc.
The soffit is the enclosed portion of the roof that overhangs the house walls at the roof lower edges.
A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load.
Usually made from 1 2 inch plywood the decking closes and reinforces the roof structure and provides a nailbed for the shingles.
A roof provides protection from the elements and precipitation helps drain water away from a structure and provides insulation that helps keep the interior of a building warm or cool depending on the season.
Roof edge or eaves edge all the boards running along the edge of the roof or eaves.
Roof sheathing or roof decking.
Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing.
Using seasoned or dry wood for building the sheathing prevents the wood from buckling or pulling away as the wood dries.
Under the quebec construction code certain kinds of particleboard are also authorized.
Other parts of the roof are nailed to this later.
A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.
