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Design SpecificationsSite DustIf cutting or drillingsheets is likelyto result in dustgeneration, adequateventilation and/orprotection mustbe provided. Healthand Safety ExecutiveGuidance NoteEH 44 Dust inthe Workplace:general principlesof protection shouldbe followed.Standard RoofingNominaldepth54mmSpaced RoofingNominaldepth54mmlap70mmFixingFixingNominal pitch146.5mmnominal width 1086mmnet cover 1000mmNominal pitch146.5mmnet cover 1016mmFixingFixing
Design SpecificationsSheet fixingPre-drillingEvery sheet should be twice fixed at each purlin.It is extremely important that thecorrect roof purlins/rail system,type of fixing and washers areselected, to eliminate leakage/corrosion and the generaldeterioration of the construction.It is recommended that a self-drillingTop-Fix screw is adopted. Thissimple method offers a fast, lowcostfixing solution. Using a highspeedscrew gun, drive in the fixing.The fixing system is only suitable forroofs up to and including 30º pitch.Using a tungsten carbide tipped drillat 90º angle to the sheet, drill a hole2mm larger than the selected fixing.The drill point should be no less than60º to the sheet. Always drill at the‘apex’ of the profile. Do not fix asheet in the ‘valley’ or on a ‘slope’of the profile.NEVER hammer fixing throughthe sheet. This will invalidate theguarantee. Fibre-cement sheetswill shatter under impact andsubsequently allow water topenetrate the apparent fixing.ALWAYS pre-drill.To achieve a watertight andweathertight seal, it is important toconfirm that the sealing washer iscorrectly tightened. Not over tight,not too loose. After a period of time,when the material has settled, thefixings may require re-tighteningwith hand tools. Be sure to useroof ladders to avoid walking onthe roof sheets.Note: Where <strong>Cemsix</strong> is used as a vertical cladding, sheets should be fixed in the valley of the 1st corrugation in from the overlap.The following screws and washers are available ex-stock:120mm drive screws for timber purlins.105mm screws for Zed purlins between 1.6mmand 2.5mm thick steel.110mm self drilling steel screws for hot rolled steelbetween 3mm and 6mm thick steel.130mm screws for timber purlins.www.cembrit.co.uk
Page 4 and 5: Cemsix CorrugatedSheetsProduced in
Page 6 and 7: Cemsix CorrugatedSheetsColouredtop
Page 8 and 9: Cemsix CorrugatedAccessoriesCemsix
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Page 14 and 15: Design SpecificationsOverlap sealin
Page 18 and 19: Storageand handling1. Coloured shee
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