J.H. Fiber cement is composed of 70% concrete and 30% celluoose. Cellulose being ground up paper. Both water and cement wick moisture so if you use these products be sure to read and follow installati ... read more
They are definitely measured differently. The insert window you would measure inside the existint window frame, which in most cases is built out of 3/4" lumber all the way around. For a full replace ... read more