Tracker Posted January 20, 2016 Share Posted January 20, 2016 I may well be wrong but my theory about holes in an aluminium roof has more to do with electrolytic corrosion, particularly where the aluminum is in contact with wood or metal or fixings and that type of corrosion can be started by simply the moisture in the air. Once icorrosion takes hold and more water gets in it can spread very quickly. Link to comment Share on other sites More sharing options...
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