Vermiculite Insulation R Value

16 1 m2k w per metre of insulation.

Vermiculite insulation r value.

K value 0 063 w mk. Large commercial vermiculite mines currently exist in the united states of america. A principal derived from this material is zonolite stabilized concrete aggregate. The bright walls of the vermiculite mica flakes are a multitude of screens that reflect and disperse the heat energy transmitted by radiation and make such the insulating material suitable for high temperatures.

Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board. As long ago as 1945 the national bureau of standards reported in its bms report 103 that the. Vermiculite has many uses such as loose fill insulation for attic spaces block core fill insulation insulation around chimney flues and in gardening applications. The thermal resistance or r value of polystyrene foam board depends on its density.

Can you give me an r value. Vermiculite is a hydrous phyllosilicate mineral which undergoes significant expansion when heated. Vermiculite is a mineral mined from the earth composed of shiny flakes that look like mica. 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.

Vermiculite forms by the weathering or hydrothermal alteration of biotite or phlogopite. Fiberglass blankets and batts. Notes on the r value k values of different forms of asbestos. Since it has an r value of about r 2 per inch it was used for decades as an insulation material.

Insulation and the r values shown above should be used for the purposes of comparison with other system values. Vermiculite is a naturally mined ore product that is non combustible and fire proof. And not only do they significantly increase the tested r values of these walls they also can help change the fire rating of many walls from a basic 2 hour fire rating to a 4 hour rating. Zonolite when mixed with.

Perlite and vermiculite are used as loose fill insulation in the construction of modern insulated masonry wall systems. Exfoliation occurs when the mineral is heated sufficiently and commercial furnaces can routinely produce this effect. How much good can i get out of perlite or vermiculite concrete as an insulating material under a slab on ground for my house. Vermiculite is a form of mica that expands when heated.

Before giving a specific answer we should point out that it is normally uneconomical to use insulation under the whole slab. Type of insulation r value per inch of thickness. Notes to the table above.