Construction on the exterior walls for the Fifth Town Cheese Factory is nearing the halfway point. The exterior walls are built with Durisol stay-in-place wall forms (http://www.durisol.com/) which are manufactured from a mixture of raw wood chips and shavings, neutralized and mineralized then bonded together with Portland cement. The R-value of the Durisol blocks combined with the optional built-in insulation and the thermal mass of the concrete far exceeds minimum standards