## What is the R-value of 1/2 foam board?

STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F.

## What is the R-value of foam board insulation?

Foam board insulation R-value varies based on type but is anywhere from 3.6 per inch of insulation thickness to 8.0. The types of foam board insulation include polyurethane, polyisocyanurate, extruded polystyrene foam, and expanded polystyrene foam.

**What is the R-value of 1.5 Rigid insulation?**

9.3 1.62

R-Value Chart for EnerfoilTM Rigid Foam Faced Insulation

Thickness (Inches) | R-value (in I-P/Imperial) | RSI (R-value in Metric) |
---|---|---|

0.75 | 4.5 | 0.81 |

1.0 | 6.2 | 1.08 |

1.5 | 9.3 | 1.62 |

2.0 | 12.4 | 2.16 |

### What is the R-value of blue foam board?

DuPont™ STYROFOAM™ Scoreboard Insulation Board (Blue Board) 4 ft by 8 ft Sheet, 1.5″ Thick, R value 7.5 A nonstructural, rigid board insulation manufactured of Extruded Polystyrene Foam (XPS).

### What is the R-value of 1 2 drywall?

0.45

Total R-Value of Composite Wall

Material | R-Value (ft2 o Fh / BTU) |
---|---|

1/2 inch Gypsum Board (Drywall or plasterboard) | 0.45 |

Wood Siding, 1/2 inch | 0.81 |

Plywood, 3/4 inch | 0.94 |

Insulating sheathing, 3/4 inch | 2.06 |

**What is the difference between pink and blue foam board?**

Both are manufactured using the same process and contain similar chemical components. The two products also have the same insulating power. However, blue foam boards are manufactured by Dow Chemical Co. whereas the pink foam boards are manufactured by Owens Corning company.

## What is the thinnest insulation with the highest R-value?

Aerogel insulation

Aerogel insulation offers the highest R-value of any insulating material at less weight and thickness—ideal for construction, refineries, pipelines, and thin-gap thermal barriers.

## What is the R-value of 1.5 inch foam board?

R 7.5

Additional Information

Thickness | 1.5 in |
---|---|

Length | 8 ft |

Width | 4 ft |

Edge Type | Square |

R Value | R 7.5 |

**What is the difference between blue and pink foam board?**

### What’s the R-value of 5/8 Sheetrock?

Further, drywall commonly comes in two thicknesses 1/2-inch and 5/8-inch. Therefore, a 1/2-inch thick sheet of drywall has an R-value of about 0.5, and a 5/8-inch thick sheet of drywall has an R-value of around 0.6.

### What is the R-value of 3 4 plywood?

Plywood is not as effective an insulator as fiberglass. It comes in a number of widths, the widest being 3/4 inch, which has an R-value of 0.94.

**Which foam board insulation is best?**

Polyisocyanurate

Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation.

## Which insulation has the highest R-value?

Rigid Foam or Panel Insulation. The type of insulation with the highest R-Values,with a few exceptions,is rigid foam or panel insulation.

## What is the best insulation foam board?

Polyisocyanurate. Polyisocyanurate,or Polyiso (PIR),is a foam used as insulation.

**What is the are value of 2 inch foam board?**

The R-value is R-3.5 to R-3.6 per inch, so filling a 2×4 cavity yields about an R-13. Subsequently, question is, How thick should foam board insulation be? It comes in standard-size 4×8 sheets, and smaller sizes, in many different thicknesses from 1/4 inch to 2 inches.

### What do you need to know about foam board insulation?

Keep foam board insulation away from direct sunlight prior to installation; it will degrade its R-value.