A truss is a prefabricated wooden structure that integrates a triangular webbing of structural members to provide support for the roof above while tying the outside walls of the house together.
What structure holds up a roof?
The truss is the “skeleton” of a roof, made of a series of parallel beams. The rafters are the supporting beams that run from the apex to the bottom of a roof, holding up the truss. Eaves are the edges of a roof, typically overhanging the vertical exterior walls of a building.
What does a roof sit on?
The couple roof comprises two rafters leaning against each other, tied where they meet at the top. The rafters sit on a wall plate which is an efficient means of spreading the load exerted by the roof structure down through the walls without creating pressure points where each rafter meets the wall.
What do you call a roof with 4 sides?
A mansard roof is a four-sided roof with a double slope on each side forming a low-pitched roof. A mansard roof can help create extra living space.
What is the middle of a roof called?
The ridge is the peak where two sloped roof sections meet. Part of a roof’s frame, a ridge board runs horizontally along the peak of a sloped roof. Essentially the spine of a conventional stick-framed roof, the ridge board is sandwiched between the meeting ends of the roof rafters.
What are the 3 types of trusses?
Common types of roof truss
- King Post truss. A king post truss is typically used for short spans. …
- Queen Post truss. A queen post truss is typically a vertical upright with two triangles either side. …
- Fink truss. …
- Double Pitch Profile truss. …
- Mono Pitch Truss. …
- Scissor Truss (also known as Vaulted Truss) …
- Raised Tie Truss.
Whats cheaper rafters or trusses?
Because they are usually pre-constructed off-site and brought to the job, trusses are faster and cheaper to install than rafters because they use smaller, cheaper pieces of lumber and rely upon multiple components to strengthen a unit rather than relying on weight-bearing rafters alone.
What are the top tiles on a roof called?
Eaves (or Top) Tiles.
What is the cheapest roof to build?
Asphalt shingles are the cheapest roofing material at $100 to $150 per square.
Which roof pitch is best?
Pros. Since a low pitch roof doesn’t require as many shingles, more often than not, a low pitch roof will end up being more cost-efficient during installation. The lower pitch of the roof means greater walkability. Low pitch roofs are safer and easier to access when maintenance and/or repairs are needed.
Can I change the shape of my roof?
Changing the pitch of a roof is only possible when a roof’s internal and structural materials are also replaced. When a roof’s ridges, walls and rafters are switched out, there is a chance to create a new architectural design that can change the pitch of the 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. …
What goes on roof before shingles?
Sometimes called roofing felt underlayment, roofing tar paper, or roll roofing, this is a layer of protection installed between the roof deck and the roofing shingles.