Achieving a tight building envelope has been the goal for builders for years. But creating a tight envelope in the wrong way can lead to more problems.
When a building is sealed too tightly, temperature differences between the interior and exterior can become too extreme. This leads to moisture build-up and, eventually, mold. A good way to prevent this issue is to use polythene sheeting on the interior.
Too many builders also find that they are faced with the decision of creating a tight envelope and then either dealing with water vapor or allowing thermal bridging to occur. However, if the right insulation is used, it can help with both issues.
So, while it’s important to insulate and create a tight envelope for clients, it’s also important to use the right insulation. Insulation that can breathe and allow for moisture management leads to better results on the project.