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Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 1 of 9
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Roofing
Unit 207: Carry out first fix flooring and roofing
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 2 of 9
Types of roofs
Pitched roof Flat roof
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 3 of 9
Common roof types
Most roofs are constructed in one
of two ways:
• traditional cut roof
• roof trusses.
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 4 of 9
Single and double roofs
A pitched roof can either be a single roof or a double roof.
A double roof with a larger span requires support for the rafters, which
are called purlins.
Single roof Double roof
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 5 of 9
Types of roofs
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 6 of 9
Popular trussed rafter profiles
Images courtesy of Trussed Rafter Association; www.tra.org.uk. Reproduced with permission.
King post truss
Fan truss Attic or ‘room in the roof’ truss
W or fink truss
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 7 of 9
Images courtesy of Trussed Rafter Association; www.tra.org.uk. Reproduced with permission.
Erection of common trussed rafters
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 8 of 9
Types of truss clips
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 9 of 9
Truss straps
Restraint straps fixed at maximum 2.0m from the centre.
Truss rafter fixed to wall plate
Level 2 Diploma in Site Carpentry
© 2013 City and Guilds of London Institute. All rights reserved. 10 of 9
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unit 207 carry out first fix flooring and roofing

  • 1. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 1 of 9 PowerPointpresentation Roofing Unit 207: Carry out first fix flooring and roofing
  • 2. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 2 of 9 Types of roofs Pitched roof Flat roof
  • 3. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 3 of 9 Common roof types Most roofs are constructed in one of two ways: • traditional cut roof • roof trusses.
  • 4. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 4 of 9 Single and double roofs A pitched roof can either be a single roof or a double roof. A double roof with a larger span requires support for the rafters, which are called purlins. Single roof Double roof
  • 5. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 5 of 9 Types of roofs
  • 6. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 6 of 9 Popular trussed rafter profiles Images courtesy of Trussed Rafter Association; www.tra.org.uk. Reproduced with permission. King post truss Fan truss Attic or ‘room in the roof’ truss W or fink truss
  • 7. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 7 of 9 Images courtesy of Trussed Rafter Association; www.tra.org.uk. Reproduced with permission. Erection of common trussed rafters
  • 8. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 8 of 9 Types of truss clips
  • 9. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 9 of 9 Truss straps Restraint straps fixed at maximum 2.0m from the centre. Truss rafter fixed to wall plate
  • 10. Level 2 Diploma in Site Carpentry © 2013 City and Guilds of London Institute. All rights reserved. 10 of 9 Any questions?