is hempcrete waterproof

Is hempcrete waterproof

Cost is a factor that people always ask about. In our experience, we have found that a single family residential house can be built for close to the same price as a custom-built stick frame house. Much will depend on the level of finishing that you want and what area of your country that you live in, etc. Also there is a question of are you building with a financial plan in mind; i.e. a rental suite or small home business/farm. This may help defray the ultimate building costs. Consider that a small building may be more expensive; i.e. 800 sq. ft can be almost the same price as a larger building, the foundation /roof, heating, kitchen , bath being the most expensive parts. Please speak with your building professional when pricing and budgeting.

Where do I start?

We offer an initial 30 minute consultation via telephone. You do need basic plans drawn up and a pre-consultation questionnaire will soon be available. In the meantime think about: How much machinery (i.e. front end loader) you have and how much free/low cost labour. Are you going to subcontract or build yourself? Also to consider the cost of the hemp shipment, how thick that you want your walls, what type of climate do you live in, what kind of structure (timber, dimensional, wood, metal) , what kind of foundation etc.

What is the R-Value of hempcrete? How does it perform in hot or cold climates?

This is a complicated question and one that is still being investigated. R-Values measure thermal resistance, or the ability of a material to resist movement of heat through it’s structure. The higher the R-value, the more the material resists the movement of heat. The R-value is a static number that does not calculate thermal mass performance.

Thermal mass is a concept in building design which describes how the mass of the building provides “inertia” against temperature fluctuations; basically the ability of the material to absorb and radiate heat or cool. In the winter, in-floor heating can provide efficient warming of the house and in a hot summer, the mass of floors and walls will keep the house cool.

Hemp walls, because they “breathe”, unlike concrete, also have a moisture regulating quality.

here have also been many tests with adobe buildings in the USA and it has been found that the total performance of the building is higher than the perceived static R-value. Hemp may have similar thermal.

In a nutshell, those living in hemp-concrete houses from the mountains in Italy to damp conditions in Ireland, have found them more comfortable to live in and less costly to heat/cool than stick/plastic/gypsum houses.

Do you have samples of your hempcrete? Can I order hempcrete?

Basic hemp recipes can be found in Steve Allin’s book, so you can mix it yourself! We do NOT supply any form of hempcrete

How long has hemp building been around?

There are projects in France now 40 years old and getting stronger all of the time, also there are some very pretty 2000 year old Roman aqueducts!

Can I visit your project?

Due to high demand for visits , we are currently only accepting consulting clients, or potential clients who have an interest in building with hemp.

Isn’t hemp illegal?

Industrial hemp is NOT the marijuana plant and has been “legal” all over the world for thousands of years, and was in fact a required crop in the USA during wartime for its many textile and fabric uses. There is a theory that hemp was too much of a competitor for American cotton and timber interests and, because of it’s distant relationship to the marijuana plant, was lumped together.

Would you like to link to my hemp and marijuana supplies website?

Because of the stigma attached to marijuana, we don’t associate industrial hemp and what we do with anything to do with marijuana. There is a clear distinction between marijuana and industrial hemp. The confusion between the two species is hurting the industrial hemp industry. However, once the difference is understood then it makes the industrial hemp more acceptable.

I would like to learn more about the spray-on technique. Is anyone doing this in North America?

Not to our knowledge; the cost of setup and machinery is high, and with current emerging demand for hemp building it is difficult to justify the cost.

Is there a supplier of hemp herds? In Canada? Do you know a place which sells at the retail level?

Yes, but no retail options at this point – that we know of.

How do I construct hempcrete from raw materials?

Hemp is very time consuming to process and beyond the scope of most people. I suggest contacting your local government agriculture office and get Steve Allin’s book.

How much hemp would I need for walls with these dimensions?

This is a consulting question! We are happy to help out small owner builders with details like this, but there will be a fee. We will NOT work without written plans to refer to (see above). Please have some kind of diagram in drawn up BEFORE the consultation!

How much tamping is required the hempcrete mix?

If you are pouring, as opposed to spraying, the hemp mix, you need to tamp. A stick or spade work well and some people like a sledge hammer. We tamp until the fibres are lightly compacted, but not jammed together with all of the liquid forced out.

Can I create pathways or form hempcrete into basins for catching rain water reserves for a permaculture I am setting up?

In our experience , outdoor, and in-contact-with-the-earth applications of hempcrete may not work well. Hemp is very resilient but does need time to dry out between soakings and unprotected slab applications may not work well in the long term. From Europe, we have heard reports of successful hemp-lime interior floors that have been successfully laid over a dry and drained sub-floor. The same goes for water basins. Please let us know of any trials that you have done!

What’s it like to live in a hemp house?

Amazing! how many times during the storms of winter has one member of the family said “I love our little house!”. It is warm in the winter, cool in the summer, amazingly quiet and cozy- just what a house should be!

What is the most efficient way to insulate a hundred year old house with a hemp compound?

There are many ways to use hemp materials as an insulation. However one would have to would need more data; what R-value are you trying to achieve? How much of a renovation are you doing- ie tearing off old siding, gutting the place? What is the structure of the place? timber frame? Studs? What thickness? Why do you want to use hemp? What is your budget ?

Is hempcrete waterproof Cost is a factor that people always ask about. In our experience, we have found that a single family residential house can be built for close to the same price as a


HempCrete is a construction product people make from hemp fiber hurds as well as lime. It is also great for all types of insulation as it is a bio-composite.

The product is environmentally more friendly than traditional concrete and is much stronger.

As well as this, hempcrete is waterproof, breathable and is great for low and high temperatures thanks to its thermal mass.

What is hempcrete?

Hemp is not just a powerful product for consuming as a hemp extract and hemp seed. It is also used in building and a wide range of construction purposes.

Industrial hemp is a variety of the cannabis plant species that people grow specifically for a range of commercial purposes. Whether you use hemp for paper, fabric, clothing, biodegradable plastics, paint, insulation, biofuel, food and animal feed—it has plenty of exciting uses.

Using hemp fiber or hemp hurd offers durable and strong construction for buildings looking for natural and sustainable building material.

Hempcrete is a hemp-lime composite consisting of the chopped woody core of the plant. People mix it with a lime-based binder and water to make the material.

People can then use it in the same way that they use concrete. The only difference is it has natural and ethical properties thanks to the hemp hurd.

Why is hempcrete popular?

Hempcrete building is in its infancy. However, it is popular in Europe and Canada and is gaining momentum globally.

The product is popular thanks to its many benefits.

Hempcrete is cost-effective as the main ingredients are hemp hurd and lime binder. The hem hurd is affordable. The farmers can grow the hemp easily. That means it’s readily available.

These days, any building material that is natural or ethical is a winner. And hempcrete is one of these products.

People make eco-friendly buildings with natural products. To this end, hempcrete helps to meet the demands of today’s ethical and green contractors and builders.

Why is hempcrete important in a building?

Hempcrete has the natural ability to control interior humidity levels. It can help to offer a cool space in the heat and warm space in the winter. This ability allows for the accumulation of moisture externally and keeps mold at bay.

If you hate mold in your home or space, hempcrete is the answer.

Not only is hempcrete helping to keep your home or property the perfect temperature, but it can also help with individuals with allergies or asthma.

Sensitivities to concrete can be an issue for many people. Because of this, hempcrete is perfect for individuals with sensitivity to traditional concrete dust.

Also, it has anti-microbial properties. That means it actively resists mold and mildew. Furthermore, you can use it for buildings in damp locations.

Are there any benefits?

There are plenty of great reasons why your property should use hempcrete.

Hempcrete is thermally efficient. That means it can keep your home warm in winter and cool in summer. Also, you can save on heating and cooling costs. That’s because the material retains heat well.

It is also made from renewable plants and can reduce the cost of energy in building thanks to its sustainable and natural properties.

People make this eco-friendly material with fewer toxins. That means it’s friendly for the planet as well as your family.

The product also offers increased protection from the noise inside and outside the property. This is because of its acoustic properties. And that makes it a great material for soundproofing your home or building.

As well as all the benefits above, hempcrete is cost-effective and can replace a wide range of other construction materials.

How it different from concrete?

Hempcrete is made using hemp hurd and is a little different than concrete. Mainly, that’s because people make it with plant material.

You can use it for walls, floors and roof insulation. Also, it works to protect against humidity and mold. And as we said before, you can control the ambient sound of an environment with this material.

The big difference with hempcrete is that it can breathe and can also regulate moisture.

Traditional concrete struggles to breathe in the same way and can have issues with mold. That makes hempcrete a viable alternative.

People have actually used this material for decades. And it continues to gain momentum as eco-friendly construction materials gain popularity.

Is it legal?

Yes, it’s perfectly legal. That’s because the 2018 Farm Bill removed hemp from the list of controlled substances.

Now, it’s legal for farmers to farm. Also, businesses can run ads and create awareness around hemp. Before, that was not the case.

Unlike marijuana, hemp is natural and only has trace amounts of THC. It has less than 0.3%, and that’s not enough to get you high.

Not like you’d smoke hempcrete anyways. But if a building made of it were to catch on fire, the smoke wouldn’t have any psychoactive effects.

It’s great that it’s legal, too. That’s because people use it for a huge number of things. For example, people make clothing out of hemp. They also make everything from bath bombs to pasta with hemp.

How do they make it?

The process of making hempcrete includes hemp hurd and mineral binder that is made from lime.

They combine these ingredients together with water. Then, a chemical reaction happens. This makes the materials bind together. And that’s what makes it strong.

Hempcrete binds together and cures just like concrete. After that, people can use it for building or insulation.

Why should I use hempcrete?

First, it’s affordable. It’s strong. And, it’s eco-friendly. It really can replace concrete in lots of ways.

If you’re looking for non-toxic building material, hempcrete is a great option.

Hemp is ethical and fair trade and using hemp in concrete is a natural and eco-friendly alternative.

No matter what you are building or insulating, hempcrete offers a wide range of sustainable options.

Healthy, sustainable and natural, hempcrete is the way of the future for building materials. And, it’s a healthier option for the property occupants.

To find out more, check out IsoHemp and American Lime Technology.

Last updated: July 9, 2020 Posted in: Farming & Construction

An eco-friendly alternative to traditional building materials. Hempcrete's higher thermal efficiency means it keeps homes warm in winter & cool in summer. ]]>