Wool Insulation R Value

As a benchmark one inch of solid wood has an r value of 1.

Wool insulation r value.

Fiberglass offers an r value of 2 2 to 2 7 per inch while rock wool has an r value of 3 0 to 3 3 per inch making it a slightly better insulator than fiberglass according to the u s. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications. Havelock wool offers both wool batt and blow in insulation. The r values of each product are 3 6 per inch and 4 3 per inch respectively.

The thermal resistance or r value of polystyrene foam board depends on its density. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. What is the advantage on pure wool.

Pure wool life insulation is an improved performance natural wool insulation that the r value is increased the other major advantage is that pure wool life insulation will not maintain a flame at a temperature below 1 200 f without the use of any chemicals whereas other natural wool insulation products often need the addition of chemicals such as boric. Mineral wool insulation is made from rock and blast furnace slag. Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal. R value is a measurement that rates how resistant a product is to heat flow measuring the ability of heat to transfer from one side of an object to another. R value denotes resistance to heat flow. Over time the r value of xps insulation can drop as some of the low conductivity gas escapes and air replaces it a phenomenon is known as thermal drift or ageing.

The r value of sheep s wool insulation ranges between 3 5 and 3 8 per inch. The additional r value is primarily due to the crimped nature of sheep wool insulation which traps air in. The molten substance is spun into billions of fibers which are formed into insulating blankets with a high recycled content that provide fire resistive characteristics thermal insulation and sound control. Sheep wool insulation r value equals or often surpasses that of other insulation materials.

R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. The raw materials are melted in a furnace at temperatures above 2 600 f. Notes to the table above. Notes on the r value k values of different forms of asbestos.

The higher an insulation s r value the greater its insulating power.