International Association of Certified Home Inspectors
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| Exterior Inspections Contains discussions about the exterior portion of a home inspection. This includes roofs, gutters, downspouts, decks, patios, windows, etc. |
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#1
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has anyone seen blistering on aluminums siding like this? it seems to be localized to the north wall which happens to have dense shrubs. chemical spray treatment possibly? galvanized nails? Any ideas?
Thanks, John |
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#2
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Looks like a paint defect more than corrosion. How much was there?
“The things that will destroy America are peace at any price, prosperity at any cost, safety first instead of duty first, the love of soft living, and the get-rich-quick theory of life.” Theodore Roosevelt Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
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#3
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quite a bit, it looks like what happens to your car from the rust causing the paint to bubble.
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#4
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#5
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I can't really tell from the photo but did it look like it was recently painted (not the orginal factory coating)?
Richie Dimmerling II, P.E., S.I. Inspection Engineer 614.309.7552 |
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#6
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To me it looks like the owner tried to touch up some spots on the siding and the touch up stuff blistered.
Ian Niquette Square One Home Inspection Markesan WI 53946 www.squareonehomeinspection.com Active Rain Network INACHI Awards Portal Want To Exchange Links? What we've got here is......failure......to communicate.....
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#7
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owner probably used latex paint......which will do exactly what is shown in your pictures (because of ammonia in the latex)...............aluminum siding can be painted but it must have a oil based primer first.....other wise one is wasting their time.
regards Jeff |
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#8
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If it's a paint issue, it will be a failure of the bond and may feel hollow.
If it's corrosion, popping a little section should show corrosion. Aluminum doesn't really corrode, but there are similar alloys that will. Are you sure this wasn't a steel-core product coated with aluminum? Kenton Shepard, InterNACHI member # 04082383 Certified Master Inspector (CMI) InterNACHI Director of International Development Director of Green Building EXPERT WITNESS SERVICE Conventional and Log homes (303) 717-8940
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#9
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I think you mean it doesn't rust, which is for iron and steel corrosion, but aluminum does corrode. I believe the corrosion is aluminum oxide which protects the aluminum some from further corrosion, as I understand it.
InterNachi Awards Portal: http://co.nachi.org/inachiawards/ ____________________________________________ "An Education, not just an Inspection" Larry Kage, CMI Lake Ann (Traverse City), Michigan 49650 231 929 3525 Professional Inspector serving the Traverse City, Michigan area and beyond.
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#10
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Aluminum is a high-energy metal, meaning it takes a lot of energy to mine, refine, combine and manufacture it. This also means that it should corrode fairly easily, since high-energy metals naturally break down until they reach their lowest energy state, which is usually an oxide, as you said, Larry. Oxides are the raw materials used to manufacture aluminum and other metals. They're what's taken out of the ground.
I've asked about aluminum corrosion but never really gotten a satisfactory answer. Anyway... I sure would like to know the real answer to this one. Kenton Shepard, InterNACHI member # 04082383 Certified Master Inspector (CMI) InterNACHI Director of International Development Director of Green Building EXPERT WITNESS SERVICE Conventional and Log homes (303) 717-8940
Last edited by kshepard; 6/26/09 at 9:35 PM.. |
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