What is Hempcrete? Hempcrete is the term used for the lightweight, insulating and breathable material produced by mixing hemp shiv with a lime based binder and water. It can be cast around a load-bearing frame (such as a timber frame) within temporary form-work or can be spray applied. It is left to set, after which time a variety of finishes can be applied. Usually a breathable lime plaster or render is used, but other options include timber cladding and masonry cladding (using lime mortar). Varying the ratio of lime binder to hemp shiv varies the strength and other properties of the hempcrete allowing it to be used as a breathable solid floor, walling system or as roof insulation.
Cast around a timber frame, Hempcrete is unique in its ability to provide excellent thermal and acoustic insulation as well as thermal mass and storage all in a single structurally sound building system which can be used as the external skin of a building. Other modern methods of construction would require several different materials, products and assemblies to match its properties and meet the many different requirements for walls, floors and roofs.
Hempcrete creates healthy, breathable buildings, it can absorb and emit moisture vapour which helps to regulate internal humidity and prevent trapped moisture and toxic or black mould growth, ensuring a healthier indoor climate.
Costs: The costs of Hemp-Lime building are comparable to those of conventional construction and in many cases, due to the lightweight structure requiring less substantial foundations, Hempcrete has been a more cost effective alternative. Visit our gallery page to learn about a kitchen extension where this was the case.
Advantages of using Hempcrete-
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