# Do you want a low or high R-value?

## Do you want a low or high R-value?

There is a relationship between U-value and R-value—they are mathematical reciprocals of each other. Thus, while lower U-values indicate better insulating performance, higher R-values indicate better thermal resistance.

What is a good R-value for a house?

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.

Is a higher R-value better for insulation?

An insulating material’s resistance to conductive heat flow is measured or rated in terms of its thermal resistance or R-value — the higher the R-value, the greater the insulating effectiveness.

### Is a higher R-value always better?

R Value is the measurement of how well a product resists conductive heat flow. Simply put, R Value is a term the construction industry uses to explain how well a material prevents heat from passing through a given material. The higher the R Value, the greater the resistance and better thermal insulating power.

What is R and U value?

R-Value is a measure of thermal resistance, or the ability of an object or material to resist the flow of heat. U-Value is a thermal transmittance, or the heat loss through a structural element.

What is considered a high R-value?

12 or below indicate low, between . 13 to . 25 values indicate medium, . 26 or above and above values indicate high effect size.

## What R-value do I need in my walls?

Generally, climates that need to keep the heat in require higher R-Values. Insulation in Zones 1 and 2 typically require an R-Value of 3 or 4 while properties in zones 3 to 7 will require an R-Value of at least 5.

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 insulation 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 insulation has highest R-value?

What Windows R-value is best?

A good R-value range: Greater than R-5. A good U-value range: 0.20 – 1.20 according to energy.gov.

What is a good U-value for insulation?

The best insulating materials have a U-value of close to zero – the lower the better. Building regulations currently stipulate that for a new building, the elements must have maximum U-values as follows: Wall – 0.3 W/m2k. Roof – 0.15 W/m2k.

## What kind of R-value do I need for my house?

What R-value Do I Need? 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 does a higher are value mean for insulation?

Higher R-value means greater insulation performance, and thus more savings on your next heating and cooling bill. This guide will teach you everything you need to know about insulation R-values so you can better insulate your home.

Which is more efficient higher your or lower R?

It’s more efficient to use a higher R Value rated product in the upper levels of your home, such as the attic and in rooms with particularly high ceilings – this makes sense if you consider that heat tends to rise. We want to keep a lid on that!

### Which is an example of an effective your value?

For example, when insulating an attic, an effective R value will take into consideration not only the insulation materials, but the roofing, flooring, and other components that will affect the overall performance. Why Is R Value Important? How Does It Affect Energy Efficiency?