Re: Please Help if you Can!
With all you describe I would strongly suspect mold. The toxic molds are very tenacious at dispersing their spores and VOCís. and are very easy to cross contaminate especially into cars and onto things like paper, clothing and furniture. The mycotoxins they produce can be very difficult to remove causing sickness long after the person has left the contaminated building. With all the work your uncle continued to do at the affected house after moving into your relatives home, it would be extremely easy for cross contamination to occur.
Iíll give you a sobering example which may make it easier to understand. I am so sensitive to mold that if someone lives in a house where one of the molds grows that I am very sensitive to, I cannot get within 10 feet of them without reacting. And if I were to hug them I would get very sick indeed. Or if I were to get into their car, I would react very strongly and be quite ill. All because of how easily and quickly the spores will hitchhike on anything they can, looking for another place to grow.
Bottom line with mold, if you are sensitive to it (usually genetic), then you will be reactive to the live mold, the dead mold, the mycotoxins, the vocís and the residue from all of it.
Oddly enough most DRís and many allergists are not knowledgeable enough to properly diagnose and treat it. They are simply not well trained in all the range of reactions that each person can have and often mis-diagnose, no matter how well meaning they may be. Unfortunately they often do not suspect mold even when there is good reason to. If at all possible for your relatives who are sick, it would be best if they could see an environmental DR as they are well versed in all the possibilities and know the best tests. This could also help with understanding what toxins are involved just in case it isnít mold.
Many of the symptoms you named could easily be mold related including the dog. I would have the house thoroughly tested. Be sure to find someone who specializes in diagnosing rather than treating if at all possible in order to get an unbiased test. In order to find a reputable person try asking for recommendations from a DR who specializes in mold treatments or from any environmental groups in your area. This is the best way to get accurate and trustworthy results.
If your Uncle is suspicious of the greenhouse wall, take that very seriously as a strong suspect for mold as that is a red flag situation. My advice, have your uncle stop working on the house and then coming back to place where all live, get rid of all paper from the affected house (mold feeds on it), clean all surfaces with GSE solution (grapefruit seed extract) including washing clothing & bedding, get house and cars tested for mold.
If I were you Iíd go for a strong mix with a ratio of 4 drops GSE per ounce of water. Use that for cleaning surfaces and spraying inside of car. A common brand in health food stores is Nutribiotics. For washing clothing use Ĺ teaspoon per regular load. Be sure to always add the GSE to warm water and mix well. In washer, let clothing soak for 1 hour without any detergent being added yet. After soaking, wash as normal. There are other brands of GSE solutions being sold as mold solutions. They are also effective. I only have experience with one of them. GSE is not cheap but it is VERY effective. I have saved several things with it and I know of several specialists who recommend it.
One important note on testing, make sure you do not solely rely on gravity plate testing as there are certain highly toxic molds (stachybotris) that do not plate well and must be tested by other means such as tape sampling. There is also vacuum air sampling which is much better at accuracy for testing. And of course there is nothing that replaces a visual inspection by a knowledgeable eye.
I hope you get answers soon and can get relief from symptoms quickly.