Wool Insulation R Value

The thermal resistance or r value of polystyrene foam board depends on its density.

Wool insulation r value.

The common denominator among varieties of insulation is the r value. Sheep wool insulation r value equals or often surpasses that of other insulation materials. Mineral wool insulation is made from rock and blast furnace slag. 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.

On average sheep s wool insulation is approximately 0 3 to 0 6 points higher than alternative insulation options such as mineral wool cellulose and fiberglass. 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. The r values of each product are 3 6 per inch and 4 3 per inch respectively. The r value of sheep s wool insulation ranges between 3 5 and 3 8 per inch.

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. Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board. Ceiling insulation r value r value for walls and more. Notes on the r value k values of different forms of asbestos.

The higher an insulation s r value the greater its insulating power. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. 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.

Havelock wool offers both wool batt and blow in insulation. 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. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. Notes to the table above.

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. As a benchmark one inch of solid wood has an r value of 1. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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 additional r value is primarily due to the crimped nature of sheep wool insulation which traps air in.