created by michael martin april 2004 / reviewed & updated march 2010
Post on 31-Mar-2015
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GABLE ENDS, VERGE, EAVES & ERECTION OF GABLE ROOFS
Created by Michael Martin April 2004 / Reviewed & updated March 2010
Gable Ends, Verge, Eaves & Erection Procedure
Your ref: Carp. 11 – P40 to 55 Three main methods to finish gable
ends Flush gable – No eaves Flush gable – raked eaves Boxed gable
Flush Gable
This Means: end of gable is flush or in-line with outside face of end wall
No overhang, just barge fixed flush
Can be applied to timber clad home
Or brick veneer Or cavity brickwork Stud frame at gable
ends are at same centres as wall frames
Flush Gable with raked eaves / verge overhang
End of roof extends over end of wall
Sometimes also referred to as verge overhang
Ridge and / or purlins can be extended for extra support
Framing variations – raked eaves / verge
Top plates may also extend to support the rafter
With possible addition of stiffener
Variations – canter lever gable frame
Typical in some older Bungalow style federation homes
Gable end rafters are notched to take trimmer or outrigger support
Variations – cont.
Extend purlin if necessary for additional support
Boxed Gable
If this is desired finish Extend purlins and
plates Also include bottom
chord or tie to extend gable
Provide gable studs Line with required
finish
Verge Finishes
Your ref: P44 This is the section at
the end of the gable roof
Where roof surface meets the barge or the verge board
Finishes depend on roofing material
Patent verge finishes
See page 45 Steel colourbond
facias are becoming more & more popular
Verge finishes are made to match
Eave Finishes
Eaves finish is relevant to house design – can be
Boxed eaves Raked eaves Open eaves
Eaves clearance
Where timber eaves framing passes over face of brick walls
Allow 12mm min. clearance between soffit bearer & brick
Allows for shrinkage in frame
If no clearance top brick may tilt under load
Erection of Gable roof
After ceiling frame complete Measure & cut ridge to length Mark rafter centres Allow extra if gable overhang
Erection procedure Erect pair of rafters
at each end Nail through one
side into end of rafter
Align opposing rafter and skew nail
Erection procedure Plumb one end &
attach a temporary brace
This prevents raking Attach string line on
top of ridge Block and check
while fixing remaining rafters
Erection procedure Set out and fix
purlins into position Cut & fix struts for
whole roof Cut & fix collar ties
Erection procedure Fit permanent wind
bracing Can be opposing
timber braces Or metal speed
braces
Erection procedure
Cut and fix gable studs Onto bottom chord or tie
piece
Erection procedure If not pre-determined Calculate drop off and
mark overhang Mark plumb cut, if not
done previously
Erection procedure String line rafter
ends Mark individually Cut plumb cut at end
Erection procedure After rafters are cut Fit eaves soffit
bearers Cut and fit timber or
metal facia
Erection procedure Cut and fit barge
boards Cut and fit metal
barge soaker if applicable
Timber fillet can be placed at end of barge to hide gutter
ReviewThree methods to finish…Flush gable – no eavesFlush gable – raked eavesBoxed gableOverhang also referred to as…..The verge overhangSupporting members…..Ridge, plates with possible stiffener and
purlins, depending on design
Review cont.
Extra member in boxed eave….
Bottom chord or tie piece
Three types of verge finishes…
Metal barge cap, barge tiles, tiles bedded
and pointed, patent verge finishes
Three types of eaves…
Open eaves, boxed eaves, raked eaves
Review cont.
Important clearance…
12mm between soffit bearer and brick
Review – erection procedure in dot form
Measure & cut ridge Mark rafter centres (allow any extra) Erect a pair of rafters at each end Plumb one end and temporary brace String line to ridge, check, fix remaining rafters Set out & fix purlins Cut & fix struts Cut & fix collar ties Fit permanent bracing Studs to gable ends Mark plumb cut and remove excess rafter length Complete eaves soffit, facia and soakers if applicable
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