Here are some quotes from FantasticHemp. I cannot verify many of the claims made on their site, but this certainly seems like something to investigate further.
“Hemp can be made into any building material, including fiberboard, roofing, flooring, wallboard, caulking, cement, paint, paneling, particleboard, plaster, plywood, reinforced concrete, insulation, insulation panels, spray-on insulation, concrete pipes, bricks, and biodegradable plastic composites which are tougher than steel.
Germany and France are using hemp for construction material, replacing drywall and plywood. Using hemp is economically smart and ecologically appropriate, plus the homes built with hemp are as hard as stone and are not subject to natural disaster.”