I know that aluminum and pressure treated lumber are not supposed to be mixed. But I do not know if that means raw aluminum or if painted coil stock can be used with pressure treated lumber. I am asking because I just looked at a couple of doors that a customer wants trimmed out in white coil stock and the trim pieces are pressure treated where it sits on top of the concrete. They were told that wood in contact with concrete needed to be pressure treated.
My first thought was to apply a flashing tape over the PT wood to help isolate it from the metal. But then I do not know if I have ever heard if the painted metal can contact PT or if they are talking about unpainted metal.
Seems to me that this is one of those areas that one product that is recommended for use almost contradicts the next step in construction.
I looked briefly at the past threads on the topic but did not see raw aluminum and PT mentioned specifically as what you needed to watch out for or if it is all aluminum products.
My first thought was to apply a flashing tape over the PT wood to help isolate it from the metal. But then I do not know if I have ever heard if the painted metal can contact PT or if they are talking about unpainted metal.
Seems to me that this is one of those areas that one product that is recommended for use almost contradicts the next step in construction.
I looked briefly at the past threads on the topic but did not see raw aluminum and PT mentioned specifically as what you needed to watch out for or if it is all aluminum products.
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