In general, you might need a hectare of hurds to create a 1,450 square foot house. However, the average American home is around 2,500 square feet. Therefore, you would need 1.72 hectares of hurds. This equates to 4.25 acres worth of hemp at 900 pounds an acre.

It takes about two tons, or approximately 125 bags, of hemp to build a tiny hemp house, but you can go full-sized too. A 1,500 square-foot house, or about the size of an average three-bedroom home, requires around 1,000 33-pound bags of hemp. May 10, 2019

Of hemp's many uses, one of the most promising could be in construction. “Hempcrete,” made from the woody core of hemp, is showing promise as an environmentally friendly building material. ... And one of the most promising of its many uses, he found, is its application as a building material known as hempcrete.

Hemp homes are virtually fireproof, there are videos of someone taking a blowtorch to a hempcrete wall. As the the flame is held to the wall, the material became charred, but didn't catch on fire. ... Not only did hemp capture carbon from the air while it was growing, it could reduce a home's energy costs.

Because of its fast growth, structural blocks and panels made from hemp and hempcrete, it is an alternative to more traditional cement blocks and timber framing. Reducing pressure on forests worldwide and cutting back on an estimated 15 billion trees which are cut down each year. Less deforestation would also lead to increased carbon capture, thus offering a natural way to combat global warming. The cement industry is also one of the most significant contributors to global warming. It accounts for 5 percent of all CO2 emissions. On the other hand, Hempcrete doesn't require widespread chemical processes or the burning of fuel that release greenhouse gas emissions. The lime utilized in hempcrete as a binder can capture carbon dioxide from the atmosphere, as the lime cycle's natural chemical processes allow hydrated lime to harden into limestone.