ProSand receives’ numerous calls every week from customers concerning sunlight damage. Discoloration to hardwood floors are a common problem with large window openings. Customers generally notice discoloration when a rug or large piece of furniture is moved. Yellowing or amber colors are common flooring problems whether pre-finished or site finished. Once the damage has occurred, the only solution is to sand the floors. A preventive measure is to filter out harsh sunlight by using a clear protective UV film on the windows. Surprisingly this is a very economical and affordable solution.