Hygric Behavior of Viticulture By‐Product Composites for Building Insulation

Abstract

One possible approach to reducing the environmental impacts associated with the building sector is the development and use of bio‐based building materials. The objective of this study is to determine the water properties of bio‐based insulation materials, derived from winegrowing co-products, which promote energy efficiency. The water performance of these new bio‐based materials is based on the measurement of the moisture buffer value, the sorption isotherm, and the water vapor permeability. Four by‐products are analyzed: stalks, grape pomace, crushed stalks, and skins; they are combined with a potato starch binder. The performance of these composites is compared to two other bio‐based composites (hemp/starch and beet pulp/starch). The stalk/starch composite can be classified as a hygroscopic and breathable material with excellent moisture retention capac-ity.