## What is the R-value for spray foam insulation?

Closed-Cell Spray Foam Insulation Closed-cell spray foam has a far better R-value per inch than other, less effective insulations like cellulose, fiberglass, or even open-cell foam. All these have R-values ranging from R-3.2 to R-3.8 per inch. The R-value of closed-cell foam is R-6.5-7 per inch.

## What is the R-value of 3.5 inches of spray foam?

about 3.5 per inch

The R-value of open cell spray foam is about 3.5 per inch, although the R-value can be different depending on the product. Open cell spray foam has a low density and is many times applied in interior walls and areas that are hard to reach in a home.

**What is the R-value of 4 inches of spray foam?**

Spray Foam Insulation R-Value Open cell spray foam insulation is R-3.6 to R-3.9 per inch. This R-Value is normal for open cell spray foam.

**What R-value is 2 inches of spray foam?**

R-Value In 2 Inches Of Spray Foam The R-value ranges from R-3.5 to R-3.6 per inch. The filling of a 2×4 cavity yields about an R-13.

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

Open-cell spray foam has an R-value of about R-3.7 per inch, while closed-cell spray foam has an R-value that may be as high as R-6.5 per inch.

### What is the R-value of 1 inch foam?

R-values can range from 3.6 to 4.2 per inch.

**Is 2 inches of closed cell foam enough?**

Closed cell spray foam should be 4- to 5- inches on the ceiling and 2- to 3-inches in the walls. This might come as a surprise to you, but honestly, this is all the spray foam it takes to get the biggest bang for your buck with the air seal and thermal resistance needed for certain areas of the home.

**What is the R-value of 2lb spray foam?**

R5.5-6 per inch

2 lb spray foam, when applied at a thickness of 50mm or more, can act as a vapour barrier. They offer the highest R value per inch of all spray foam systems (typically R5. 5-6 per inch depending on the thickness).

## What is a good R-value?

Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc.), you’ll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces.

## What is the R-value of 4 inch rigid insulation?

R-Value Chart for EnerfoilTM Rigid Foam Faced Insulation

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

2.5 | 15.5 | 2.7 |

3.0 | 18.6 | 3.24 |

3.5 | 21.7 | 3.78 |

4.0 | 24.8 | 4.32 |

**What is the R-value of 2 inch white 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.

**What is the R-value of 5 inches of spray foam?**

Open-cell spray foam has an R-value of 3.7 per inch, while closed-cell spray foam delivers an R-value of up to 6.5 per inch.

### 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 are rating of spray foam insulation?

The R-value of spray foam insulation is approximately 6 per inch so those using spray foam as their insulator will need about 6.3 inches of thickness to reach R-38. The R-value of fiberglass insulation is approximately 2.2 per inch so much thicker fiberglass insulation is required to achieve the same R-value of 38.

**What is the your value of spray insulation?**

R values are additive, so you can multiple the number of inches of insulation thickness times the R value to arrive at a total insulation value. A typical 2×4 stud filled with open cell spray foam will have an R value between 10.5 and 14.

**What is the are value of foam?**

The “R” in R-value stands for resistance. This is the resistance to the movement in temperature through walls, ceiling and floors in your home or commercial building. One criterion you look for when your deciding between different types of insulation foam is the R-Value of the product.