Sheet Weathering Lead sheet Step flashings Feature tops Ornamental roof tops Roof canopies and bay tops Flat roofs Side cladding Parapet gutters From Plumbing (3rd edition), R.D. Treloar, page 353 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com Lead sheet

Sheet Weathering Bossed corner Picture shows the excess lead that has been worked up as the corner was moulded and bossed From Plumbing (3rd edition), R.D. Treloar, page 354 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com

Sheet Weathering Lead bossing Internal corner External corner surplus lead cut off ‘setting in the corner’ blows directed into the base of the corner crease line lead dummy to give support bossing stick bossing mallet pull up sides to the required angle boss lead in and up finished detail surplus lead trimmed off stiffening crease bossing mallet to give support Internal corner lead bossed round corner surplus lead cut off bend lead to the required angle drip plate finished detail lead bossed into new corner External corner From Plumbing (3rd edition), R.D. Treloar, page 355 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com Lead bossing

Sheet Weathering Sheet fixing secret tack welded dot lead dot wedge 20–25 mm 300–500 mm cover flashing clip hooked over top of batten; alternatively the clip can be screwed to the wall face 3 layer roof felt continuous fixing clip at drip edge welded cover patch plumbers black tack welded to back of sheet solder lead secret tack dot mould alternative fixing clip to above welded dot lead dot soldered dot From Plumbing (3rd edition), R.D. Treloar, page 357 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com Sheet fixing

Sheet Weathering Lead roof coverings and wall cladding Example maximum bay size for code 6 lead, as illustrated would be: 2.25 x 0.675 = 1.5 m2 50 mm 25 mm 2.25 m 0.6 m 150 mm code 6 1/3 length of bay 0.675 m Bay detail of flat roof 2.0 m lead weathering junction timber support fixing bracket plywood backing panel 1/3 max galvanised or stainless steel bar lead weld at corners Preformed cladding Lead roof coverings and wall cladding From Plumbing (3rd edition), R.D. Treloar, page 359 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com

Sheet Weathering Expansion joints for lead roofs lead drip up 45 mm drip 40 mm 45 mm 25 mm standard size drip wood cored roll 55–60 mm splash lap overcloak roll incorporating additional clip thus omitting the splash lap 25 mm 75 mm 50 mm lead drip up to 3° hollow roll used on pitched roofs undercloak 75 mm vertical cover nail heads sealed with lead welded dots lap 35 mm 25 mm standing seam 75 mm welt fixing clip lead drip 3–10° Expansion joints for lead roofs From Plumbing (3rd edition), R.D. Treloar, page 361 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com

step and cover flashing Abutment flashings in lead Sheet Weathering lead wedge 100–150 mm soaker fixing clip 75 mm 25 mm 100 mm cover flashing 450 mm 75 mm min 1.5 m 25 mm 150 mm min 75 mm 1.5 m max 150 mm apron flashing 25 mm continuous step flashing and soakers offcut setting out of steps to stepped flashing 85 mm 150–200 mm step and cover flashing water line 65 mm From Plumbing (3rd edition), R.D. Treloar, page 363 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com Abutment flashings in lead

Sheet Weathering Chimney flashings From Plumbing (3rd edition), R.D. Treloar, page 364 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com

Sheet Weathering Chimney flashings in lead Lead welded back gutter cover flashing saddle piece (for use where the chimney passes through the ridge) back gutter tilting fillet gutter sole soakers lead welds Lead welded back gutter cut lines step flashing front apron fold lines gussets 150 mm gusset 45° 150 mm width of stack 200–250 mm width of stack 25 mm (turn in at brick joint) 150 mm 150 mm sole Lead welded front apron 100 mm upstand 150 mm 100–150 mm roof pitch 150–200 mm From Plumbing (3rd edition), R.D. Treloar, page 365 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com Chimney flashings in lead

Sheet Weathering Lead slates and pitched gutters lead slate collar solvent welded to pipe vent pipe flat butt weld roof pitch 150 mm flange slate in position 150 mm lead slate overflow pipe 150 mm 150 mm saddle valley lead sleeve 75 mm Lead welded slate tilting fillet 225 mm 150 mm pitched valley gutter Lead slates and pitched gutters From Plumbing (3rd edition), R.D. Treloar, page 367 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com 150 mm min eaves

Sheet Weathering Gutter linings Drip design Box gutter Tapered gutter code 5 lead 2 m 2 m 2 m sole of gutter gets progressively wider code 8 lead 3 m pitched roof 3 m Drip design by using thicker lead, longer bays can be achieved gutter sole Box gutter 100 mm cover flashing Tapered gutter chute catchpit hopper overflow downpipe Gutter linings From Plumbing (3rd edition), R.D. Treloar, page 369 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com

Sheet Weathering Dormer windows Lead covered dormer windows dormer top welted vertical joint incorporating fixing clip return welt soaker weathering bead side cheek tray and apron flashing Lead covered dormer windows From Plumbing (3rd edition), R.D. Treloar, page 371 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com Dormer windows

Sheet Weathering Aluminium and copper sheet weathering 9 mm 16 mm 32 mm 8 mm Single lock welt 14 mm 45-50 mm 32 mm 22 mm fixing clip Double lock welt Batten roll overcloak 45 mm undercloak 38 mm 32 mm 25 mm Standing seam 50–65 mm Vertical drip Dog ear corner Aluminium and copper sheet weathering From Plumbing (3rd edition), R.D. Treloar, page 373 Copyright Blackwell Publishing Ltd, all rights reserved: www.blackwellpublishing.com