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Frequently Asked Questions


What is HempWool®?

HempWool® is a sustainable and healthy fiber-batt insulation. Compared to many other insulations on the market, HempWool® has no toxins, is naturally made (from industrial hemp!), and is an easy to use product substitution for conventional insulation products like fiberglass or Rockwool.

What is HempWool® made of?

HempWool® is made up of approximately 92% hemp fiber and 8% textile fiber binder

Where can I use HempWool insulation?

HempWool® be used in flooring, ceilings, walls, or anywhere else traditional insulation is used. HempWool® can also be used in vans, trucks, or bus building projects.

How can I order HempWool®?

HempWool® can be ordered directly through our Buy Direct Portal: buy.hempitecture.com. If there are any questions feel free to contact us via email sales@hempitecture.com or schedule a call here: https://www.hempitecture.com/book-online

How do I install HempWool®?

HempWool is very easy to install and worker-friendly through a pressure-fit system. We recommend you cut it .5” thicker than the cavity you are filling it with.
Learn the techniques and tools of the trade by visiting our HempWool specific web pages.

What do you cut HempWool® with?

There are a number of tools you can use to cut HempWool. A non-serated blade is best. This could be a manual insulation knife used for cutting RockWool. Additional tools include a metal cut off wheel on a handheld grinder, a FESTOOL insulation saw, or even an electric bread knife.

Who can I hire near me to install HempWool®?

HempWool® can be installed by any local insulation subcontractor, general laborer, or even yourself! It's easy and safe to use!

How do I know how much insulation I will need?

You can find our HempWool® calculator by visiting our Buy Direct Platform: Buy.Hempitecture.com In addition to finding the total square feet of the wall(s) is by multiplying ceiling height by total wall length.

What is the R-Value of HempWool®?

The R Value of HempWool® is 3.69 per inch

What are complementary products for the HempWool®?

HempWool is a 1-to-1 replacement for conventional insulation products. Therefore, it works in conventional situations with 16" OC or 24" OC framing layouts. HempWool works well under drywall, but can be used in conjunction with nearly every standard building material.

Is HempWool® fireproof?

HempWool® has Class-E fire resistance, so although it is seen as higher on the FSI and SDI, you can protect HempWool between fire-resistant walling (both your exterior siding and interior wallboards). Due to the lack of fire resistance, it is generally approved by a case-by-case project and is not applicable for some projects. As we transition to a new manufacturing facility, we are integrating fire-retardants into HempWool®. Expect Fire Resistant HempWool in 2022.

Is HempWool® susceptible to mold growth?

HempWool is Vapor Permeable and Hygroscopic – meaning it can interact with moisture without any problems. HempWool helps prevent airborne moisture movement, improving building durability and longevity. HempWool disperses moisture and helps to protect the surrounding building components. It has the ability to store and release moisture without loss of its insulating properties. In fact, we're currently doing a study on its mold resistance, since it is a great characteristic of the product. It's not complete yet though. ASTM Standards testing shows no mold growth. If HempWool is exposed to excessive moisture such as a flood or a persistant leak, like any product, mold can grow.

How does HempWool® interact with pests and insects?

Hemp Fiber naturally repels rodents, mites, and termites because of the silica (a mineral) in the hemp plant. Hemp also has very little protein for pests and the mechanical strength of this material is too strong for anything to nest in it.

What are the acoustical details of HempWool®?

HempWool performs comparably to conventional insulation products in regards to sound attenuation. In the future, we intend to launch acoustic insulation products.

How does HempWool® withstand humid environments?

HempWool is ideal for humid environments, since the hygrometric insulation is vapor permeable and also resistant to mold. HempWool should not be exposed to excessive moisture, as excessive moisture can cause mold. Interior to a cavity that is properly air and vapor sealed, HempWool is the ideal product for humid climates.

Is HempWool® toxic?


Why is HempWool® so expensive compared to other insulation materials?

HempWool is currently more expensive than other products because it is manufactured out of the US and imported long distances to meet our end customer. We’re working on addressing this with our US manufacturing facility which will allow for sourcing the raw materials from a regional radius, and position us closer to our customers.

What about the health and safety of HempWool®?

HempWool insulation is extremely safe to handle and install. It contains no formaldehyde, glass fibers, asbestos, Chlorofluorocarbons (CFCs), Hydrofluorocarbons (HFC), or Hydrochlorofluorocarbons (HCFCs). There are no health risks such as cancer-related warnings associated with its installation. It does not irritate skin or itch as does mineral wool and fiberglass insulation.

Will my local building code and permitting office allow the use of your products?

Our products have been approved for use by building departments across the country. Because HempWool® and hempcrete are new to the construction industry, a technical conversation is useful for most building offices and inspectors to become familiar with these materials but they are often supportive of their use once they realize the sustainability potential. It is usually up to the local building jurisdiction to decide whether or not these building materials can be permitted.

Where is HempWool® made?

Our products are currently manufactured in Canada. We are currently building a US manufacturing facility in Jerome, Idaho.

What makes HempWool® sustainable?

Plant based products generally are more sustainable than petrochemical, synthetic, or resource extracted products. This is because plants grow quickly, and during their growth cycle, the offset and store carbon dioxide. Industrial hemp is particularly adept at this.

What types of certifications does HempWool® have?

HempWool is currently ASTM tested for a number of criteria. With our US manufacturing facility, we intend to have our products tested and qualified for numerous certifications.

Is HempWool® from the Marijuana plant?

Hemp and Marijuana both derive from the cannabis Sativa family, they do share certain similarities. However, due to each plant’s biological structure, they have several and very distinct differences. Hemp plants are slim and very tall, reaching a height between 10 and 18 ft. Hemp leaves are also very skinny and are commonly found nearer the top of the stalk alongside the trichome-rich buds. Hemp plant color varies. Some are a lighter green, while others have a greyish hue. Historically, industrial hemp and its fibers have been used for clothes, rope, shoes, carpets, and paper. Our products are 100% THC free.

What is the Hempitecture Shipping Policy for HempWool®

See our full shipping policy here: https://www.hempitecture.com/shipping-policy


What is Hempitecture?

Hempitecture was founded with the idea that healthy, sustainable materials can help build a better world. These materials can help build a better world by contributing to our health, saving energy, and storing carbon dioxide. We achieve our mission by focusing on biobased, natural building materials that are designed to replace conventional, toxic materials.



Why Hemp?

Industrial Hemp is a rapidly renewable crop that can be harvested in 3 to 4 months cycles and produces more usable mass per acre than timber. During its growth cycle, industrial hemp captures 9.8 tons of CO2 per acre, making it a carbon-sequestering crop. There are multiple usable parts from the industrial hemp stalk. Hempitecture uses the inner wooden core of the hemp stalk for hempcrete, and the outer fiber from the stalk is used in HempWool.


How does shipping work?

Hempitecture currently works with third-party shipping companies. Once you purchase your order, we will handle the shipping arrangements and share the tracking information (via a pro-number) with you once the shipment has been picked up.

How long does it take to receive my insulation?

If the inventory is in stock, it usually takes about one to two weeks to receive your insulation.

If you would like to place a larger order, please contact us at sales@hempitecture.com in order to best prepare your shipment.