How Does a Windowsill Get Rotted?
A windowsill can become rotten if a structure is not properly insulated. Insulating the structure allows moisture to stay out of a home as well as keeps the structure cool in the summer months and warm in the winter months. Insulation limits the amount of mold that can form, especially on the windows and the wood surrounding the windows and the sills themselves. Trapped moisture within the inside or outside of the window drips down and seeps into the wooded area around the windowsill and will then begin to rot. Blown in insulation or fiberglass insulation will keep the structure at a steady temperature compared to the outdoors, which will in turn cut down on moisture levels and reduce the growth of mold and mildew that lead to windowsill rot. If the windowsills in a structure are showing signs of rotting, a closer look at the age and installation method of the windows should take place. If the windows appear to not be weatherized properly and contain gaps or holes where the windowsill
