What is the R-value of a bale of hay?

The reported R-value of straw bale walls varies from R 2.38 per inch to R 0.94 per inch.

Is hay a good insulator of heat?

Inch for inch, straw bales insulate about the same as fiberglass, but because they are so much thicker than typical rolls of insulation, they provide a stronger shield against heat and cold.

Are straw bales good insulation?

Straw is a renewable material offering good thermal insulation properties and a much lower environmental impact than many current mainstream construction materials. Straw bale is very suitable as infill insulation for timber- frame buildings with either an external render or timber rainscreen finish.

Is straw a good insulator?

Straw is a natural and renewable material with excellent insulation properties. Compared to other types of insulation alternatives, straw bales have a much lower environmental impact.

Does straw attract mice?

Straw has nothing edible to attract mice but hay has grass seeds that provide good winter provender for mice families. Straw bales stacked for supporting walls and structures have no holes in which mice can tunnel and no spaces in which to build nests, but hay bales stacked in a barn have many.

How long does straw bale insulation last?

Other insulation materials, such as fiberglass, require a substantial amount of energy to produce. 7. Straw bales are 100% biodegradable—when the time comes. Straw Bale homes can last over 100 years if properly maintained.

What are the disadvantages of straw?

Drinking through a straw can contribute to lip wrinkles, bloating, cavities, and teeth staining. If you must drink through a straw, consider using a reusable straw to reduce plastic waste. The production and disposal of plastic straws contribute to environmental pollution.

How long do straw bales last?

Straw is slow to break down, and Joel has found they tend to last for two growing seasons. Hay bales are used to feed livestock. The grass crop – like alfalfa, fescue, or clover – is grown specifically to be dried and baled as a food source, so hay is more expensive.

What is the R-value of fiberglass insulation?

The R-value for fiberglass batts ranges from 3.1–3.4 per inch of thickness. For loose-fill fiberglass insulation in an attic, the R-value is 2.2–4.3 per inch and for the wall is 3.7—4.3 per inch.

How big is a straw bale?

Straw bales are compressed in “flakes” of about 4". The two standard bale sizes are 18" x 36" x 14" ("2-string") and 24" x 46-48" x 15-16" ("3-string"). The length of bales can be easily changed, but because of the shoot of the baler, the height and width are fixed.

Why is using straw for insulation good for the environment?

Straw bale walls offer good insulating performance, as well as high thermal inertia, and can be used in green buildings since straw is derived from agricultural waste, does not require an industrial process, and is degradable.

What's the difference between straw and hay?

Hay is a crop that is grown and harvested as a feed crop for cattle, horses and other farm animals. Straw on the other hand is a byproduct of a grain crop; in our area it's usually usually wheat straw that we see.

Can straw self combust?

Breadcrumb Menu. Usually, we think of water and moisture as a way to put a fire out, but the opposite is true with hay and straw, which when too wet can heat and spontaneously combust.

Is hay a good insulator for dogs?

"Hay is an amazing insulator because it's a cheap source of something that is going to really warm up your animal," Newell said. "You can get a huge bail of hay from anywhere from $10 to $15 and that hay splits off into smaller flakes and you can use just a couple flakes, you know, for one dog."

Why is a straw bale house considered a green home?

Advantages of a straw bale home over a conventionally built one include: They use a fast growing and renewable agricultural byproduct that is otherwise wasted. They contain fewer toxins than conventional materials. They have a high insulation factor that lowers the cost of heating and cooling.

How long does a hay bale house last?

If built correctly a straw bale home can last 100 years at least. When it's life cycle is complete, a structure stripped of all but the walls can be tilled back into the earth. That can't be said for stick frame homes using modern insulation.

Do straw bale houses rot?

Lastly, hay also decomposes naturally, making the house likely to rot, while straw usually requires additional nitrates to decompose. The main threat to straw bale homes is moisture, as it is for many homes.

What are the disadvantages of straw bale construction?

The Disadvantages of Straw Bale Construction

• Labor.
• Moisture Susceptibility.
• Maintenance.
• Structural Movement.
• Acceptance Problems.

Are straw bale houses strong?

Because straw bales are so tightly packed, they have three times the fire resistance of conventionally constructed walls. It seems counterintuitive, but straw bale is an excellent choice in areas prone to wildfires.

Do termites eat straw bales?

Very few termites are likely to be interested in eating the straw bales themselves. Even those that normally eat grass. Lots of subterranean termites will happily travel through the bales to reach unprotected framing timbers (such as door frames and window lintels – see photo).

How do I keep rats out of my hay bales?

Pack any small openings with steel wool or stiff metal screen; use caulking to hold the metal in place. Eliminating feed sources and blocking access will deter a significant number of rodents. Now you can use traps and bait stations/rodenticides to get rid of any remaining rats and mice.

Do mice nest in hay bales?

Hay bales are more likely to attract rodents looking for a place to nest. Similarly, use straw to stuff a scarecrow, not hay. The packed hay is a perfect place for rodents to nest.

Are snakes attracted to hay?

Snakes are not attracted to straw, however if they already live in the area of your garden, they may take the opportunity to sun themselves on top of the bales before the bales are covered with plants to shade the surface.