Insulation blocks or slows the transfer of heat. The heat always seeks for a way to escape the cold. The gun blasts insulation through it. It then is treated with fire retardent and insecticide. Insulation expands. It goes in as liquid. Then you cut off any excess. Fiberglass insulation is very common all over the world. Do not put it in rigidly, but instead loosely insert it in your walls. This will aid in stabilizing the insulation. Vapor is present in air. The moisture of warm air can be dissolved. This is why the vapor can collect in the bottom of the insulation. The stud bay is able to breathe in the summertime. It slows the diffusion of the vapors on the other side. This type of insulation has a strong structure, it doesn’t require an air barrier. The question of whether or not you require an air barrier is dependent on where you live in the country. The biggest issue is cost. This is way more expensive than the original cost. There are a variety of insulation. Watch this video to get additional information about how insulation works and which style is appropriate for your home. z5icje1law.