**R Value Of Drywall**. These values may not be accurate for your building material. Calculate r value of components not in cavity:

This will assume that the wall has 18.75 percentage stud area. 2 layers gypsum board 1.12 Doe are in error except for square log walls.

### The R Value Of Drywall Is Relatively Low, About 0.45 With A Thickness Of 1/2 Inch.

K/w), an estimate of the building envelope energy use for this structure is approximately 27,800. 2 layers gypsum board 1.12 Doe are in error except for square log walls.

### Calculation Using Type 2, Ashrae Method:

It is similar to building materials such as siding, concrete, soil, bricks, particle board, wood and single glazing. Other typical wall materials have similarly low values: This will assume that the wall has 18.75 percentage stud area.

### Calculate R Value Of Components Not In Cavity:

Consult your manufacturer for more accurate data if required. These values may not be accurate for your building material. Does drywall have an r value?

### 10.645 X.1875 + 41.17 X.8425 = 36.68.

Just keep in mind this. So we are using 5 inches so 5 times 3.7 would be 18.50.