## What is a good R factor for insulation?

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 insulation board?

It provides an R-value of 6 per inch of thickness and often comes foil-faced to help reflect radiant heat.

**What is the R-value of 1.5 ISO board?**

R-Value Chart for EnerfoilTM Rigid Foam Faced Insulation

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

1.0 | 6.2 | 1.08 |

1.5 | 9.3 | 1.62 |

2.0 | 12.4 | 2.16 |

2.5 | 15.5 | 2.7 |

**What is the R-value of 3 ISO board?**

Foilfaced polyiso has an R-value of about 6.5 per inch and permeability faced polyiso wall insulation has an R-value of around 6.0 per inch.

### How thick is R60 insulation?

The average recommended level is 17 inches of R60.

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

Thermablok® Aerogel

Thermablok® Aerogel is a revolutionary advancement in thermal technology offering the thinnest insulation available to prevent thermal and cold bridging. Classed as a Super Insulation, Aerogel has the highest insulation value of any known material with the lowest thermal conductivity value of any solid (0.015W/mK).

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

**What is the R-value of 2-inch foam board?**

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 insulation has the highest R value?

USA Premium Foam®

USA Premium Foam® has the highest R-Value in its class. Our proprietary USA Premium Foam Insulation has a superior R-Value of 5.1 per inch, which is 35% higher than any retrofit stud wall application. In fact, it’s the highest on the market.

## What is the R value of 1/2 rigid insulation?

STYROFOAM/BLUE BOARD 1/2″ 4’X8′ DOW R-VALUE 3.0 (RESIDENTIAL SHEATHING)/ P2S FACING.

**How thick is R30 insulation?**

Typical R-30 fiberglass insulation is 10-inches-thick.

**How thick should insulation be?**

In the attic: A good rule of thumb for insulating your attic is to make sure it is at least as tall as your ceiling joists. If you only have a few inches of insulation in your attic, you are likely wasting money on your energy bills. Build it up to at least 12 inches for optimum insulating power.

### How do you calculate the are – value of insulation?

One way to calculate the R-value of existing insulation is to measure it with a tape measure. Place the tape measure down and touch the ceiling board to get the height. For most insulations, including fiberglass and cellulose , every inch of insulation is roughly equal to an R-value of 3.5.

### What does the “R” factor in insulation mean?

The R factor of insulation can be found most easily of the insulation factors discussed, and it is the most popular indicator of a material’s insulator properties. Generally it is listed on an insulation material’s label. The R factor stands for thermal resistance.

**How to determine the R-value of insulation?**

Calculate the R-value of your attic insulation by multiplying the measurement you took by a factor based on the type of insulation you have in the attic. The Oak Ridge National Laboratory recommends using a factor of 2.5 for loose fiberglass; 2.8 for rock wool; 3.7 for cellulose; and 3.2 for fiberglass batting.

**What is the best your value in insulation?**

The insulation with the highest R value is, perhaps ironically, nothing at all. That is to say, a vacuum provides the most ideal insulation. Vacuum insulated panels have an R value of as high as 50, compared to approximately three for conventional fiberglass insulation.