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Key components of a slope roof

Short answer

Key components of a sloping roof are roof covering (tiles, sheets, thatch), battens/boarding, common rafters, purlins, principal rafters/trusses with tie beam, ridge piece, hip/valley rafters, wall plate, and eaves with fascia and gutter.

Show the key components of slope roof.

A sloping (pitched) roof has the following key components:

                 ridge piece
                     /\
                    /  \  <- common rafter, with battens
                   /    \     and covering on top
          purlin  o      o  purlin (on principal rafter)
                 /        \
                /__________\  <- tie beam of truss
     eaves  ___/|          |\___  eaves
                |          |
            wall plate on wall
  1. Roof covering (tiles, CGI sheets, slate or thatch): keeps the rain out.
  2. Battens / boarding: fixed over the rafters; the covering is fixed to them.
  3. Common rafters: inclined members from the eaves to the ridge.
  4. Purlins: horizontal members under the rafters that reduce their span.
  5. Principal rafters / trusses and tie beam: carry the purlins.
  6. Ridge piece at the top, and hip / valley rafters at intersections.
  7. Wall plate: laid on the wall to spread the load.
  8. Eaves (projecting lower edge), fascia board and gutter.

✓ Answer checked by Claude Opus 5.5 (high effort)

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