First - There is really no way of knowing IF an existing home built during the housing boom in the 3 areas you were questioning were constructed with that particular material without removing panels to see IF they were stamped or labeled with the manufacturers info. Not all panels are labeled and not all foreign manufacturers follow US manufacturing regulations and guidelines. Quality wallboard is made primarily with gypsum, whereas a lower (or cheaper) grade has flyash included, which is a byproduct of coal burning (thus the sulfer compound) and primarily used as an aditive in concrete.
Second - Another option in determining if it was used is to contact the builder of the home(s) during that time period. Unfortunately many builders went out of business since that time and that info may not be available, or given due to possible liability issues.
Third - The use of the material (from info available) appears to be predominant in the southeast region (gulf coast states) where the climate is moist, humid and hot, and used as a result of a shortage of domestic materials. The 3 areas you were questioning are in an area which is predominantly dry and hot. Now that's not to say that the possiblilty does not exist or should not be a concern.
Personally - I would be more concerned with other possible problems such as: IF the property was flooded, mold would most likely develop before any emmisions of toxic sulfer gases from the material. IF the property was built during the boom, was the pad compacted sufficently before the foundation was poured to avoid settlement and cracking of the foundation. And when the foundation was poured, was it allowed to fully cure before construction of the structure to avoid cracking from the structure's weight over time (which has happend in the Anthem area to some). And is the property located in a known area for ground fissures which are caused by depletion of ground water from pumping (Queen Creek/San Tan area) and can open up after heavy rains and cause structural/property damage. And the usual concerns such as radon gas and termites or other infestations such as ants, roaches and scorpions.
All of which can affect the health, safety, soundness and the market value of a property, in addition to the amount of foreclosures, inventory/supply, location, amenities, environmental and economical factors of the market area.
Thank you for answering my targeted question for Maricopa and Queen Creek, "Were some of the homes in Maricopa or Queen Creek, AZ built with Chinese-made drywall?" You were the only person so far that answered that question. I respect a good appraiser and someone willing to speak their mind as you have in some of your past answers to other questions from individuals.
Although you answered my question saying that it most likely would not cause the same problems in Arizona, would you feel that the chance of it causing problems in Arizona to be low enough that it should not be a significant concern to long term homeowners who have chinese drywall? If I do not know whether or not a house is built with chinese drywall, and a home inspector cannot tell me for sure one way or the other, then I will assume it is possibly made with chinese drywall until shown otherwise. This is why I changed my question about chinese drywall when asking in the Anthem Q&A section.
I appreciate you and everyone else that is willing to take their time to answer my questions. Thank you!
"It would be very difficult to determine if Chinese Drywall was used without removing the existing walls to see. However, as you stated before, being in a dry climate area, there most likely would not be the same problems, as in more humid and moist climate areas, with plumbing fixtures, pipes, exterior walls, and appliances getting corrosion from sulfer contaminents since the product was concentrated mostly in the Southeast. The concern about Chinese Drywall and its use has been around for quite some time so the article is not saying anything new."
I am bringing several buyers to the area because of the awesome community! If you have to commute to the city for employment it is about a 45-60 minute drive in the morning! I am bringing buyers that do not have to commute there or work in North Phoenix.
Feel free to contact me if you have any other questions!