Roofing

3. Roof which has an intermediate support to underside of common rafter in the form of a purlin.
6. Vertical height of the roof from wall plate to highest point of the pitch line.
11. A short piece which is fixed to the lower end of the rafter to change the roof pitch
14. A piece of triangular cross section timber fixed to the rafter or roof boarding to tilt the surface less steeply than the rest of the roof.
15. horizontal structural component placed along the top of a wall to support the ends of beams, joists, or trusses.
16. The underside of a roof overhang.
17. The edge of a sloping roof where it extends beyond the gable.
19. Structural component of the roof which changes the direction of the roof and forms an external angle.
21. Horizontal timber component that provides a fixing for the top of rafters.
22. A sloping supporting timber, that runs from the side of the hip to the wall plate.
23. The angle of the roof measured between the surface of the common rafter and the underside of joist which is stated in degrees.
24. Timbers that are fixed at right angles to the rafter or joist and provides a fixing for structural component.
25. A sloping supporting timber, that forms the external corner on the roof and runs from end of the ridge to the corner of a wall.
26. The bottom section of a roof which is formed at a shallower angle than the rest of the roof to assist rain water run-off.

1. A sloping supporting timber, that runs from the ridge beam of a roof to its edge.
2. A sloping supporting timber, that forms the internal corner on the roof.
4. Prefabricated units used to house ventilation units or flues on a pitched roof.
5. The triangular upper part of the end wall of the building with a sloping roof.
7. Term given to roof which rafters are fixed at the top and bottom and have no intermediate support.
8. The flat horizontal board which closes the end of the rafters and can form a fixing for the gutter.
9. A sloping supporting timber, that runs from the side of the valley rafter to the ridge.
10. Horizontal distance from outside of wall plate to outside of wall plate
12. A horizontal component fixed to top of wall plate and to rafters which prevents spread of rafters and provides fixing to ceiling.
13. The lowest overhanging part of a sloping roof.
18. The structural link between trusses and gable that will overhang the wall and provide a finish to the top of the gable.
20. A parapet is typically the uppermost reaches of a wall that extends above the roof level and provides a degree of protection to roof.