Page 39 - Build 153
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250 mm minimum overall valley gutter width
80 mm overhang to valley gutter
corrugated metal roo ng
20 mm cut-out to fascia
metal valley gutter (half of gutter shown dotted)
continuous solid support for valley gutter
valley rafter fascia board cut down for valley gutter overhang
80 mm minimum roof overhangs
roo ng underlay with 20 mm maximum overhang
purlin for roof xing
extend up beyond purlin
50 mm minimum valley gutter depth
20 mm minimum upstand to valley gutter
metal valley gutter folded over purlins both sides (laid over continuous roo ng underlay if copper-based treatment is used)
20 mm minimum valley gutter upstand
50 mm minimum depth of valley gutter
Figure 2 Section B – longitudinal section through the gutter.
50 mm minimum (E2/AS1) but 100 mm recommended
corrugated metal roo ng
80 mm minimum roof overhangs
purlin
rafter
continuous solid support for valley gutter
spouting
Figure 3
Section C – cross-section through alternative valley gutter detail to E2/AS1.
valley rafter
Build 153 — April/May 2016 — 37
