Straw bale home construction has been used since the early 20th century, originating in the farmlands of the mid-western United States. This new trend in home construction is proving to be one of the most eco-friendly choices a new home builder can make. This article will explain straw bale insulation and tell you what you need to get started.

 

What is it and How Does it Work?

 

Straw can be any mixture of wheat, rye, rice, oats, and barley. These natural ingredients are packed into bales which provide excellent thermal insulation for your home. The ‘R-Value’ for straw bale insulation is typically 35-50, more than double that of standard home insulation. Although walls can be fully built from straw bales, it is more structurally dependable if the straw is used as insulation, and wooden beams used for load bearing.

 

 All the major components of home building should be the same, except that the glass mineral insulation is replaced with eco-friendly straw bales. Stack the straw bales in between the frames like bricks and cover them with some mesh to keep them secure. Place a long metal stake through the straw bales to ensure that they do not shift over time. Continue the rest of the wall building process; moisture barrier, dry wall, painting etc.

 

How Much Does it Cost?

 

The cost of straw bales varies depending on the region. But compared to glass mineral insulation you can expect to pay much less for straw bales. This is especially true in rural areas where you might have access to local straw bales. You will also be saving a large amount on your heating and cooling bills due to the increased insulation factor.

 

Eco Benefits

 

By using a natural ingredient for your home insulation you are reducing the amount of harmful emission created while making synthetic (glass mineral) insulation. You are also reducing the amount of gas and electricity your home uses thanks to the increased insulation factor. Reducing gas and electricity usage reduces the amount of carbon emissions generated in gas and electricity production. Lastly straw bales are bio-degradable and are easy to dispose of at the end of their life (unlike glass mineral insulation).

 

Precautions

 

Straw bales do not have to be made specifically for insulation, though it is important that the bales are very dry and tight (less than 15% moisture). If the straw is too moist it could lead to rotting and mold. If this is a concern it is wise to install moisture detectors in your straw bale insulation walls.


There are some concerns relating to the flammability of straw bales. It is surprising to know that straw bales are considerably difficult to burn. This is because the straw is so tightly packed, it is like trying to burn a phone book. Regardless, flame retardant adhesive should be used on the straw insulation. Consult your local building code for fire-proofing regulations.

 

 

 

Straw bale insulation is a great way to insulate your house in an environmentally friendly way. You can double your home’s insulation factor and reduce those climbing utility bills, all while reducing synthetic material production and carbon emissions. So before shelling out big bucks for typical insulation, go find some dry straw bales, and put mother nature to work in your home.

 

Green-Home-Building.com