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

Review Three methods to finish… Flush gable – no eaves Flush gable – raked eaves Boxed gable Overhang also referred to as….. The verge overhang Supporting 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