Straw Roof Insulation

If two string bales yield an r value of r 40 debated by the way across the 18 direction then one.

Straw roof insulation.

Why use bales as a roof insulation. The farmer makes some money by selling the bales and the homebuilder gains an excellent insulation and building material. The quality of insulation that a straw bale wall provides depends on a number of factors including the way the bales are stacked the way the bales mesh with the roof s insulation the type of post and beam structure or if loadbearing the type of top plate the type of plaster used the quality of the plaster work and the design of the house. It would provide a better form of insulation than bats as they are completely sealed and you only have to look at the results of bush fires.

The straw clay material is a sort of hybrid between pure insulation straw baled or not and pure mass cob for ex. The thicker the bale the better the r value. The values fall between r 2 38 p in parallel with the straw and r 3 05 perpendicular to the straw. It can be made into different grades closer to one extreme or the other.

Straw insulation for the home. The amount of time effort cost and embodied energy in such a task seems to me to heavily outweigh the benefits. Straw bale roof i simply must ask. What you want is closer to the insulative side.

Strawbale insulation has been studied and tested in some of the coldest places in the world. By bailing the straw a new life is given to the material. The reason the fire s still burning is the fire got into the straw. There s multiple layers of straw through the roof because they had to reach a very high insulation rating and acoustic rating.

Homes insulated with straw bale can have insulation values of r 30 to r 35 or more. When it comes to home insulation and energy efficiency a bale of straw may seem like something only the amish do but in fact straw bale insulation has turned out to be an excellent green building element. Granted it was smaller bale sections and they had rough rendering covering them. Firstly you would not use a full bale in the roof and secondly i have previously seen a completed straw bale roof insulation.

The r value of strawbale varies between studies but is mostly consistent. Thatching is the craft of building a roof with dry vegetation such as straw water reed sedge cladium mariscus rushes heather or palm branches layering the vegetation so as to shed water away from the inner roof since the bulk of the vegetation stays dry and is densely packed trapping air thatching also functions as insulation.