![]() When we are inside a warm house, the same amount of vapor is in our breath but we dont see it. We never see the carbon dioxide and other gasses. When we go outside in the winter we see our breath. In reality, we see the vapor in our breath condensing. People breathing, coffee pots brewing, and cooking pots all add moisture to the air. We see a degree of this when it is -40° or -50☏ and there is very little vapor in the air. If the air in a house had no vapor, there would be constant static electricity, much of the woodwork would crack, people would have a hard time breathing, and would often get bloody noses. When warm air is cooled, it must release some of the water vapor it carries. Water that is suspended in air is called vapor. Warm air removes the water from the clothes by evaporation. This is why we hang our clothes outside in the summer or over the stove in the winter. When air is warmed, it removes water from other surfaces until it is saturated. Warm air can hold more water vapor than cool air. We must keep water out of our ceilings, walls, and floors whether it is water leaking from the roof or water from vapor. As soon as there is moisture and enough heat, bacteria can grow, destroying the wood fibers. In the frame of a house, there is both wood and oxygen. If any of these four is removed, the bacteria cannot grow. The bacteria that destroy wood fibers need four conditions to grow: Village Science: Insulation & Vapor BarriersĪ vapor barrier is usually a sheet of plastic, commonly called Visquene, through which air and water cannot pass.Ī home that has a vapor barrier installed properly will be warm, dry, and will last a long time.Ī modern Alaskan house that doesnt have a vapor barrier, or has one installed improperly, will have major problems.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |