Vermiculite Insulation R Value

Fiberglass blankets and batts.

Vermiculite insulation r value.

Notes to the table above. Large commercial vermiculite mines currently exist in the united states of america. Expanded vermiculite is lightweight fire resistant and odorless. Vermiculite is a hydrous phyllosilicate mineral which undergoes significant expansion when heated.

The thermal resistance or r value of polystyrene foam board depends on its density. Vermiculite is a naturally mined ore product that is non combustible and fire proof. As long ago as 1945 the national bureau of standards reported in its bms report 103 that the. 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.

Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board. 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. Vermiculite is a form of mica that expands when heated. 16 1 m2k w per metre of insulation.

Perlite and vermiculite are used as loose fill insulation in the construction of modern insulated masonry wall systems. Type of insulation r value per inch of thickness. How much good can i get out of perlite or vermiculite concrete as an insulating material under a slab on ground for my house. A principal derived from this material is zonolite stabilized concrete aggregate.

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. Can you give me an r value. When this mineral is put in an oven it expands like popcorn. Exfoliation occurs when the mineral is heated sufficiently and commercial furnaces can routinely produce this effect.

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. Since it has an r value of about r 2 per inch it was used for decades as an insulation material. Vermiculite has many uses such as loose fill insulation for attic spaces block core fill insulation insulation around chimney flues and in gardening applications. Before giving a specific answer we should point out that it is normally uneconomical to use insulation under the whole slab.

Insulation and the r values shown above should be used for the purposes of comparison with other system values. Notes on the r value k values of different forms of asbestos. Vermiculite is a mineral mined from the earth composed of shiny flakes that look like mica.