the right side of the house rain screen hardie panel fiber cement "iron gray" siding detail of mahogany Certainteed fiber cement siding The hardie panel rainscreen siding is starting to go up. The mahogany siding came in last week. All siding should be done this week! Check back this weekend for more photos. We love the iron gray color so much that we named our first born son after it. Mahogany would be a pretty bad name for a girl.