Anyone use these Dow insulation boards for interior walls? I'm thinking about using them in my place. 60 year old Pennsylvania house, exterior brick face over blocks. Currently no interior insulation between block wall and drywall, just 3/4" wood strips between drywall and block. I'm thinking about gluing these foam boards between the wood strips then attaching drywall to the strips. Any issues with moisture being trapped causing mold? The rooms are above ground. I've read some forums where people don't like attaching these boards directly to masonry walls, causes mold, but they are usually referring to basement walls. I've contacted DOW but they say it is OK but they recommend air space between the foam board and drywall.