flash peno roof_walls
Post on 12-Jul-2015
161 Views
Preview:
TRANSCRIPT
-
Flash penetrations through roofs and walls.James Langston south west TAFE
-
Introduction What are flashings
What is a penetration
Why do we need them258 1/3
-
Types of flashingsCustom made
Prefabricated258 2/3
-
Custom made flashingsSteel Gal Zinc aluminium coveredSheet zincSheet leadSheet copperSheet aluminiumStainless steel sheetNeoprene 258 3/3
-
Prefabricated flashingssteel Gal Zinc aluminium covered zinc leadcopperaluminiumStainless steelNeoprene259 1/1
-
Plan work activitiesEstablish what will be penetratedEstablish the type of material to be usedConduct a site inspectionGet specs for jobCheck for structural alterations260 1/1James Langston south west TAFE
-
Type of Penetration pipeflueDuctSky LightRoof structure261 1/2
-
Establishing material typeConcealed fixings
Pierced fixed roof261 2/2
-
Conduct site inspectionIs the penetration clear of !!!!!!!!
Electrical wiring Building servicesOther pipe workRoof supports262 1/4
-
Building plans You need to be able to !!!!!
Read a Job PlanEstimate job requirementsUnder stand your task262 2/4
-
Check for structural alteration
Safety mesh
Need to be reinforced
Check the structure
Insulation262 3/4
-
Quality assuranceProceduresMaterialsHandlingMaintenancespecifications
262 4/4
-
Safety PPEOverallsBootsSafety glassesEar plugsDust mask
GlovesSun screenHard hat263 1/1
-
How did that get in thereJames Langston's wife
-
Tools and equipment
ScaffoldingE,W,PLaddersHand toolsPower tools
SignageElectrical leads264 1/1
-
Make the work site safeWater lines- Flooding
Gas Lines- fire hazard
Electrical- electrocution
Cutting members- structure weakness 265 1/2
-
Worksheet questionsAnswer question one and two on your work sheet
265 2/2James Langston
-
Determine flashing requirements266 1/2
-
Penetration between ribsMust have an up stand with a base plate
Be sealed to roof surface266 2/2
-
Tapered skirtSealed around penetrationOverlap up stand by no lass then 50mm
267 1/2
-
Synthetic rubber flashingInstall to manufactures specifications267 2/2
-
Penetrating the ribRib to be sealed to avoid rain water entering268 1/3
-
Flashing large penetrations 268 2/3
-
Worksheet questionsAnswer question three and four on your work sheetJames Langston
-
Capillary actionIs water being drawn between two touching surfaces 269 1/2
-
Quantities @ MaterialsMatching existing materials
Right size
Avoid contact between dissimilar metals
Draining from upper to lower roof must correct materials269 2/2
-
Quantities @ qualityRight sheetsRight lengthRight fastenersRight sealantCorrect size flashingsMaterials compatible 270 1/1
-
Carry out the jobAdequate drainageRoof supportsSupports for flashingOH&SSwarf removalWater tight ribsAnti-capillary cuts
271 1/1
-
Roof structure support timbers
Support the opening with timber
272 1/2
-
Worksheet questionsAnswer question five on your work sheet
-
Ribs272 1/2
-
Ribs273 2/2
-
Stop ends in traysFull height of ribTurn up to 75 Deg
274 1/2
-
Cutting the surfaceEnsuring joints are flushJoints Lapped the right wayJoints secureKeep power leads away from sharps Do not use carborundum cutting disks
274 2/2
-
Ensuring joints are flushAvoid the build up of undrained water on roof275 1/4
-
Ensuring joints are lapped in the direction of the outlet
275 2/4
-
Ensuring joints are secure Allowances forWind pressureThermal movementWater tightness275 3/4
-
Preparation of openingCompatible materialLarge enough to drain the waterAnnular space275 4/4
-
Installing structural supportsInstall supports when roof has been weakened by sheet or structure cutting
276 1/2James Langston
-
Flashing of large ductDimension the openingSheets are cutRoof reinforcedSoaker made up and installedApron made and installedRemove swarf277 1/2
-
Soldering
Not common these days becauseOther methods availableMaterial type
277 2/2
-
SealantsCommonly usedContaining silicone rubberMany colours Suitable for roofing278 1/2
-
Worksheet questionsAnswer question seven on your work sheet
-
Benefits of siliconeStick to most materialSealant flexibleLast at least 30 years
278 2/2
-
Take care using siliconeSurface free of greaseRead instructionsSurface must be cleanCan clean with non-carcinogen solventJoints to be fixed 25mm wide seal jointSeal to cover fixings279 1/2
-
Jointing procedure AssembleDrillRemove burs cleanPlace sealantReassemble jointSeal rivets or screwsClean off extra silicone279 2/2
-
Questions and answersAnswer question eight in the work book280 1/1
-
Assessment taskTask 175mm425mm300mm150mm
-
Assessment taskTask 2
-
Assessment taskTask 3
300mmMeasurement to suit job450mm75mm
-
Assessment taskTask 4300mmx300mmAll minimum laps, overlaps and expansion allowances and other relevant dimensions must comply with SAA HB39 1997
top related