What type of insulation do straw bales provide to a structure?

Straw bales are known for their unique insulating properties due to the air pockets trapped within the straw fibers. When used in construction, straw bales can provide substantial thermal resistance, making them an effective insulation material. The natural composition of straw gives it a high R-value, which measures thermal resistance, thus allowing it to significantly reduce the amount of heat that can escape or enter a building.

In terms of insulation capacity, straw bales offer better thermal performance than conventional insulations when employed correctly. They create a natural barrier against heat loss in winter and heat gain in summer due to their thick and dense structure. This makes them particularly advantageous in energy-efficient building designs.

Therefore, the assertion that straw bales provide "little insulation" does not align with the well-documented capabilities of straw bale construction. Instead, they are widely regarded as an exceptional green building material, providing significant insulation that contributes to energy efficiency in structures.