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G'Day Gents,Need some immediate feedback if possible. Been a few more '**** ups' associated with my house. The window was never 'under-flashed' and the discussed/agreed upon process of flashing (between the builder and the Roofer/Glazier) is to pop rivet a colourbond flashing to the aluminium powdercoated channel that the 10mm laminated window is glazed into.They are likely going to use a neutral based silicone roof and gutter product to form a waterproof seal between the face of the colourbond flashing and the alum channel. With alum pop rivets every 300mm. Personally I reckon the thing is always going to leak.This could be going in tomorrow lest I put a halt to the whole show.So I need advice from those in the know as to:-1. What type of sealant or sealant/adhesive would you suggest, remembering Bluescope steel recommend a neutral base silicone????I thought to heavy duty like a sikaflex marine grade sealant adhesive but it would need to be a neutral base and there stuff is a polyurethane rather than silicone?2. Would you use a steel or alum rivet remembering the Galvanic scale and that zinc is at the anodic or less noble (Corroded End) of the scale and that aluminium and its alloys just beneath. In theory one would expect the Zincalum or the Colourbond (which is colour bonded to zincalum) to offer up protection to the alum, therefore corroding away whilst offering up protection to the alum channel?The sealant/adhesive used will possibly have to cover 15mm of powdercoated alum, then down another 10mm on to hardwood, which has been treat sometime ago with Bar-D-K. Like linseed oil but it has waxes in it. I dare say I will need to prep the timber by wiping off wax with mineral turps??? I am trying to achieve a weather proof seal here now and eliminate or reduce the likelyhood of corrosion to the alum channel (prepared to sacrafice a few colourbond flashings as required) as a result of the dissimilar metals. Need help now. Appreciate any advice asap.Cheers,Mitch.
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Greg,Stop it right now. Sketch me a detail of what is proposed and email it to me at neast@tac.com.au or fax it to 02 43810339, I'll ring you tonight if you put your number on the fax or you can ring me now on 0418 811953.Zincalume is a steel product coated with a combination of aluminium and zinc, it will not leak now, but in 10 years time it is certain to do so, at about this time the coating disappears and the steel starts to perforate through..You could instead use a powdercoated alum angle to achieve the same effect with no consequence to the corrosion. The alternative is to use a soft zinc sheet which forms in the same way as lead sheet does.Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Greg,Stop it right now. Sketch me a detail of what is proposed and email it to me at neast@tac.com.au or fax it to 02 43810339, I'll ring you tonight if you put your number on the fax or you can ring me now on 0418 811953.Zincalume is a steel product coated with a combination of aluminium and zinc, it will not leak now, but in 10 years time it is certain to do so, at about this time the coating disappears and the steel starts to perforate through..You could instead use a powdercoated alum angle to achieve the same effect with no consequence to the corrosion. The alternative is to use a soft zinc sheet which forms in the same way as lead sheet does.Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Greg,Stop it right now. Sketch me a detail of what is proposed and email it to me at neast@tac.com.au or fax it to 02 43810339, I'll ring you tonight if you put your number on the fax or you can ring me now on 0418 811953.Zincalume is a steel product coated with a combination of aluminium and zinc, it will not leak now, but in 10 years time it is certain to do so, at about this time the coating disappears and the steel starts to perforate through..You could instead use a powdercoated alum angle to achieve the same effect with no consequence to the corrosion. The alternative is to use a soft zinc sheet which forms in the same way as lead sheet does.Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Greg,Stop it right now. Sketch me a detail of what is proposed and email it to me at neast@tac.com.au or fax it to 02 43810339, I'll ring you tonight if you put your number on the fax or you can ring me now on 0418 811953.Zincalume is a steel product coated with a combination of aluminium and zinc, it will not leak now, but in 10 years time it is certain to do so, at about this time the coating disappears and the steel starts to perforate through..You could instead use a powdercoated alum angle to achieve the same effect with no consequence to the corrosion. The alternative is to use a soft zinc sheet which forms in the same way as lead sheet does.Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Gents,Have been on the phone talking with Nick and faxing drawings back and forth. Nick has suggested a fix which was previously suggested by one of the roofing crew (but rejected by his boss) and simply requires the purchase of a new flashing folded to suit and flashed into the front of the glazing channel. No major dramas. No drilling and pop riveting ect. The wife and I will sleep much easier tonight due to Nicks help on this matter. Much appreciated Nick. Thankyou.Mitch.
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Gents,Have been on the phone talking with Nick and faxing drawings back and forth. Nick has suggested a fix which was previously suggested by one of the roofing crew (but rejected by his boss) and simply requires the purchase of a new flashing folded to suit and flashed into the front of the glazing channel. No major dramas. No drilling and pop riveting ect. The wife and I will sleep much easier tonight due to Nicks help on this matter. Much appreciated Nick. Thankyou.Mitch.
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Gents,Have been on the phone talking with Nick and faxing drawings back and forth. Nick has suggested a fix which was previously suggested by one of the roofing crew (but rejected by his boss) and simply requires the purchase of a new flashing folded to suit and flashed into the front of the glazing channel. No major dramas. No drilling and pop riveting ect. The wife and I will sleep much easier tonight due to Nicks help on this matter. Much appreciated Nick. Thankyou.Mitch.
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Gents,Have been on the phone talking with Nick and faxing drawings back and forth. Nick has suggested a fix which was previously suggested by one of the roofing crew (but rejected by his boss) and simply requires the purchase of a new flashing folded to suit and flashed into the front of the glazing channel. No major dramas. No drilling and pop riveting ect. The wife and I will sleep much easier tonight due to Nicks help on this matter. Much appreciated Nick. Thankyou.Mitch.
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Actually Nick,With nearly 10 years with BHP, You initial reaction was alarmist (not surprising really).Im sure you have advised Greg that a mechanical flashing is a superior fix than relying on a sealant.However, in this application the fix that was suggested would produce galvanic action that may require remedial action sometime around 2060.(using alloy rivets)Powder coated alloy and colourbonded (painted) zincalume will not react with each other, the coatings keep the raw metals apart.Happy thoughts,Mark.
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Actually Nick,With nearly 10 years with BHP, You initial reaction was alarmist (not surprising really).Im sure you have advised Greg that a mechanical flashing is a superior fix than relying on a sealant.However, in this application the fix that was suggested would produce galvanic action that may require remedial action sometime around 2060.(using alloy rivets)Powder coated alloy and colourbonded (painted) zincalume will not react with each other, the coatings keep the raw metals apart.Happy thoughts,Mark.
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Actually Nick,With nearly 10 years with BHP, You initial reaction was alarmist (not surprising really).Im sure you have advised Greg that a mechanical flashing is a superior fix than relying on a sealant.However, in this application the fix that was suggested would produce galvanic action that may require remedial action sometime around 2060.(using alloy rivets)Powder coated alloy and colourbonded (painted) zincalume will not react with each other, the coatings keep the raw metals apart.Happy thoughts,Mark.
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Actually Nick,With nearly 10 years with BHP, You initial reaction was alarmist (not surprising really).Im sure you have advised Greg that a mechanical flashing is a superior fix than relying on a sealant.However, in this application the fix that was suggested would produce galvanic action that may require remedial action sometime around 2060.(using alloy rivets)Powder coated alloy and colourbonded (painted) zincalume will not react with each other, the coatings keep the raw metals apart.Happy thoughts,Mark.
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Young Mr Horribulus..How is galvanic effect avoided when an aluminium rivet passes through all the coatings and base metal when, as it is 'set' by squeezing it up tight so that it expands in the hole, not to mention the steel rivet shank within the rivet head, that it would not come into contact with both the stahl and aluminium?I look forward to your illucidation...Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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Young Mr Horribulus..How is galvanic effect avoided when an aluminium rivet passes through all the coatings and base metal when, as it is 'set' by squeezing it up tight so that it expands in the hole, not to mention the steel rivet shank within the rivet head, that it would not come into contact with both the stahl and aluminium?I look forward to your illucidation...Nicholas TomlinAlarmist - www.alarmist.com.au - we scare for you
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