Let’s talk about insulation! Open Cell spray foam insulation is not perfect - as you can see here. Closed Cell insulation is of course, more costly. If this is your primary means of keeping out air, bugs, dust and dirt, you are going to be very disappointed. So what’s the best answer? To not depend on spray foam insulation as your only means of insulation. Here you can see #thermaltight which is a 2” exterior insulation with a weather resistant and air resistant barrier that is sealed to the bot

Open Cell vs Closed Cell Foam Insulation: Which is Better for My Home?