How fireproof is hemp as an insulating material?

Hemp is fun for many people as a stimulant in their free time. Cannabis helps many people to heal their physical and mental ailments. But hemp is also a healthy, sustainable and economical raw material.


When grown, the plant also improves the quality of the soil in which it grows. Hemp has occupied a permanent place in people’s vehicles for centuries, for example, as a rope on ships or in bodywork. There can be a lot of hemp in our homes and buildings too. It is such a smart alternative to commonly used chemical insulation materials that create unhealthy working conditions when installed in a home.

Is there a fire hazard in a hemp house?

In principle, the question of whether hemp insulation increases the risk of fire can be answered quickly and easily. No, hemp as an insulating material is not particularly dangerous. Insulation materials that can be used in the European Union must comply with strict fire protection regulations and standards. Materials undergo some tests and are divided into fire resistance classes. Hemp insulation wool actually belongs to the fire-resistant class, more precisely, it has protection class C, according to the old classification it corresponds to class B1.

How are insulation materials like hemp tested for flammability?

In fire tests to determine the fire protection class, the material is first ignited as a single object (single object fire test). It is sometimes also tested in-line by simulating a fire in the corner of a room (corner fire test). In these tests, it is not only important whether the insulation material is flammable and how long it takes to catch fire. Points such as the degree of smoke or burning droplets that could be hazardous in the event of a fire are also included in the assessment. Although hemp and wood are smoke-generating building materials, the smoke from both materials is only slightly hazardous and non-toxic. This is rarely the case with unnatural insulation materials.

Hemp is highly flammable, so it can be used as an insulating material.

As an insulating material, hemp behaves in the same way as solid wood components. If the material burns out, a layer of ash and coal will form on the outside. This layer prevents the penetration of fire into the material. Thus, the fire is slowed down by its own combustion products. In addition, the smoke generated by a fire is relatively harmless. In this respect, hemp is even slightly superior to wood.
Thus, hemp is an excellent raw material for building components. Anyone who today thinks about their own home is unlikely to want to imagine that he is constantly surrounded by a large amount of chemical building materials. But if you know it’s an environmentally friendly, harmless hemp that keeps your home warm, life will certainly be much better.

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