"Lap siding is a popular exterior finish for both residential and commercial ICF jobs.  Cement-board siding is particularly popular, due to its durability, ease of installation and fire-resistant qualities. " Clark Ricks, ICF Builder Magazine (http://www.icfmag.com/how-to/ht_exterior_finishes.html) Installing Cement Fiber Board siding over an ICF is becoming more prevalent. There is…