What are insulating values ​​R?

insulation values ​​R are numeric values ​​that indicate the level of heat resistance in the insulation. Thermal resistance is the ability of the material to reduce the heat loss of the wall. In construction and construction, the insulation value R is a measure of the efficiency of the insulation products. The insulation is used to stop the heat loss of convection, line and radiation. In homes and buildings, most of the air in the room is lost by natural convection out.

The insulation acts as a barrier for loss of heat by acting just like the air captured. The insulation fills the space between the outer wall and the inner walls of the room. The higher the insulation value R, the closer the thermal conductivity of the captured air. The air cannot move through the air, so the insulation eliminates heat loss through natural convection by creating an insulating barrier. As a rule, the larger the value, the greater the level of insulation. The purpose of insulation values ​​is to provide homeowners and consume one comparable value that helpsin the decision -making process.

The highest insulation values ​​R are for vacuum insulated panels at R-45. Flat, Airgel has an R-10 rating, with isocyanurate foam at R-8.3 and phenolic foam on R-7. Glass fiber blown or free cellulose has an R-3 R-3.

In the US, there were many cases of misleading advertising demands on the values ​​of isolation R. In response to this, the Federal Commission (FTC) issued a rule of value R to stop the wide industry unfair or misleading actions. The R-Value insulation value must be provided to customers before the processes are purchased and the R product insulation values ​​must be clearly shown on the product label.

R-value insulation is calculated on the basis of a specific product thickness. Doubling thickness does not necessarily increase the efficiency of insulation and may actually have the opposite effect. For this reason, the insulation values ​​R.

are used instead of inches

The value of the heat loss of the wall must take into account the losses caused by windows, walls on the wall and other pipes through the wall. All these factors affect the heat loss of the wall. To maintain permanently low heat loss values, examine the value of the R windows installed in the room.