The document describes different types of eaves used in roof construction: flush eaves, open eaves, closed eaves, and sprocketed eaves. It explains that flush eaves are finished close to the wall with a gap for ventilation, while open eaves have rafter feet projecting beyond the wall. Closed eaves are completely boxed in but require ventilation, and sprocketed eaves reduce the pitch at the eaves to slow rainwater runoff. The purpose of roof ventilation is also outlined, noting that warm air and moisture build up in attics requires ventilation to escape and prevent water droplets from forming.

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PowerPointpresentation
Eaves
Unit 207: Carry out first fix flooring and roofing

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Flush eaves
Finished close to the
wall, with a gap left
for ventilation.

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Open eaves
The rafter feet project beyond
the wall and boards are fixed
on top of the rafter.

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Closed eaves
These are completely boxed
in, but a ventilation strip or
holes must be included in the
soffit.

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Sprocketed eaves
Used to reduce the pitch at the
eaves level to slow down rainwater
to prevent it overshooting the
cutter.

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Ventilation used in eaves
Strip ventilation Hole ventilation
Images courtesy of www.manthorpe.co.uk. Reproduced with permission.

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Types of ventilation used in eaves
The purpose of roof ventilation is to allow the natural flow of air inside
an attic or under the roof.
Warm air and moisture usually builds up in the attic. Without proper
ventilation, the hot air and moisture will never escape the attic.
Heat will also cause the room temperature in other parts of the house
to rise and the moisture will form droplets of water.

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Working at heights
Planning and selecting the right equipment for the job.
• How long will the job last?
• How often it will be carried out?
• What type of platform can provide safe access?
Video: www.hse.gov.uk/falls/video/index.htm

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Any questions?