My daughter and her husband are about to purchase home that was built in 1985. Although the home is in very good condition, I have one concern - the garage ceiling (with a kitchen and dining room above) is only insulated with Tyvek placed over the roll insulation. As a former electrician I am well aware that electrical codes change (as do building codes) and that items ““grandfather”” that were NOT required when the home was built. Does anyone know “what” the code was at the time this home was built and if it required 5/8" type X dry wall, if it was even available back then. OR would anyone know where I could find a copy of the 1985 building code to try and look up the material myself OR if there is an expert on the internet that could answer my question.
I am well aware of what the present day code is, and if they purchase the home , we may very well entertain bringing this item up to code. For now, I’m just trying to learn if it was legal or not, so that they can make a decision on moving forward with the purchase.