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
Hello Geoff,
In fear of giving you information that is obvious or that you already know, we move forward boldly and answer this question. I had a similar addition on a previous home and it was diffic ... read more