Glass fiber paper is used in construction projects for various purposes due to its high strength, durability, and resistance to heat and moisture. It is often used as a reinforcing material in concrete, providing additional strength and preventing cracks. It can also be used as a barrier to prevent water and moisture from penetrating walls and ceilings, acting as a vapor barrier. In insulation applications, it helps to reduce heat transfer and improve energy efficiency. Glass fiber paper is also used in the production of fiberglass, which is used for roofing, insulation, and other structural components. It's important to follow safety guidelines when handling glass fiber paper due to its potential health risks.