R Value Of 16 Concrete Wall

As we said before the r value measures the thermal resistance of a material.

R value of 16 concrete wall.

Energy and the environment. Concrete homes magazine web search 5 18 2010 r value for concrete glass other materials wikipedia web search 5 18 2010 citing ristinen robert a and jack j. This material offers the highest r values about r 6 to 6 5. The higher the r value the better the thermal performance of the insulation.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. It provides r values that range from 3 6 to 4 2 per inch. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other. The r value of an uninsulated 8 inch thick basement wall built using normal weight concrete is 1 35 based on data from the 1993 american society of heating refrigeration and air conditioning engineers handbook.

By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. Concrete block wall with perlite in cavities r 2 9. R value is a measure of insulation s ability to resist heat traveling through it. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15.

The reason that it is important to make a good estimate for the current r value for uninsulated spaces is that small changes in r values result in large changes in heat loss when the total r value is low. Concrete block wall with air in cavities r 2 0. Concrete block makes a cost effective and structurally sound wall but it has. Type of building section r value wood frame walls 3 plus r value of the insulation used floors above unheated spaces 2 plus r value of the insulation used ceilings 1 1 2 plus r value of the insulation single glazed windows 0 88 double glazed windows 1 67 doors with glass use r value of the glass for the entire door.

It provides about r 5 per inch. Therefore the doe s value is on the high end of the r value of a log wall. 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. Insulation level are specified by r value.

R values of uninsulated concrete. Some products have reinforced facing to make them sturdier.