## What is the R-value of plaster?

According to Bon, plaster has an R-value of about 0.12/inch, so your plan will give you about 0.24. That little insulation is not going to be of any practical value (R-0.24 means you’re stopping about 4% of the heat transfer).

### What is the R-value of cement?

Tables of Building Material R-values

Material | Thickness | R-value (F° · sq.ft. · hr/Btu) |
---|---|---|

Concrete 60 pounds per cubic foot | 1″ | 0.52 |

Concrete 70 pounds per cubic foot | 1″ | 0.42 |

Concrete 80 pounds per cubic foot | 1″ | 0.33 |

Concrete 90 pounds per cubic foot | 1″ | 0.26 |

#### Is plaster a good insulator?

Plaster is a Better Insulator Than Drywall Yes, your plaster walls likely have little to no insulation behind them, but the wall covering itself has an R-value twice that of drywall.

**What is the R-value of a concrete slab?**

The type of concrete used for floor slabs typically has an R-value of 0.1 to 0.2 per inch of thickness, meaning a 6-inch-thick slab would have an R-value between 0.6 and 1.2.

**What is the R-value of a 10 concrete wall?**

The R-value for this wall system is R-14. The average cost for a 10-inch block semifinished wall system (including materials and labor) is about $8.40/ft2.

## What R-value is drywall?

about R-0.5

Drywall, for instance, has an R-value of about R-0.5 for its half-inch of thickness. This is quite minimal when you consider that filling a four-inch-thick wall cavity with insulation increases the R-value to about R-15.

### What is insulating plaster?

Insulating plaster is an excellent example of a modern-day plaster. Made from either either lime or gypsum, it contains special ingredients that change only one thing about the plaster — the insulating factor. Traditional plaster insulated the wall little to not at all.

#### What is the R-value of brick veneer?

Table 1.

Wall Type | Thermal Transmittance (U) | Thermal Resistance (R) |
---|---|---|

Brick Cavity | 1.22 | 0.82 |

Brick Veneer | 1.52 | 0.66 |

Weatherboard | 1.82 | 0.55 |

**What material has the highest R-value?**

Vacuum insulated panels have the highest R-value, approximately R-45 (in U.S. units) per inch; aerogel has the next highest R-value (about R-10 to R-30 per inch), followed by polyurethane (PUR) and phenolic foam insulations with R-7 per inch.

**What is the highest R-value for a 2×4 wall?**

Cavity insulation, like framing, has options. A 2×4 wall cavity can be insulated from R-13 to roughly R-25. A 2×6 wall can be insulated from R-19 to R-39.

## What is the R-value of 2 inch Styrofoam?

A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.