What is HI R block?
The Hi-R Wall System from Concrete Block Insulating Systems, Inc. is a specially designed concrete masonry unit and individually molded insulation insert. The block and the insulation are combined at the block manufacturing plant prior to delivery to the job site.
Does CMU have an R-value?
According to the National Concrete Masonry Association (NCMA) the tested R-Value for a standard 8x8x16 concrete masonry unit (CMU) is 2.2 at 105 lb. The tested solid grouted R-Value for the same unit is 1.7 proving that air is a better insulator than grout (which is a form of concrete).
What is insulated CMU?
Hi-R® Insulated Block Hi-R® is a specially-designed CMU with smaller webs to reduce thermal bridging, and contains individually molded insulation inserts.
Does concrete block have an R-value?
Concrete block makes a cost-effective and structurally sound wall, but it has little thermal resistance. Depending on the density of the blocks, an 8-inch thick block wall without any other type of insulation has a thermal resistance value between R-1.9 and R-2.5.
What is the R-value of foam filled concrete block?
4.91 per inch
No surface preparation is required. Once set, Core-Fill 500™ foam has an R-value of 4.91 per inch, with a density of about 0.8 pounds per cubic foot. But unlike loose fill insulation products or dry mix foam products, Core-Fill 500™ won’t settle over time or experience the shrinkage of dry mix products.
Is a higher R-value better?
“R” means resistance to heat flow. Here’s what to know: The higher the R-value, the greater the insulating power. Almost all insulation products have to tell you their R-value — including duct wrap.
What is the R-value of spray foam insulation?
5.0 to 7.0 per inch
The R-value of closed cell spray foam ranges from 5.0 to 7.0 per inch, although the R-value can be different depending on the product. Closed cell spray foam is denser than open cell spray foam and is often used in areas like basement box sills where it helps prevent moisture from entering the home.
What is the R-value of 8 CMU block?
1.11
Tables of Building Material R-values
| Material | Thickness | R-value (F° · sq.ft. · hr/Btu) |
|---|---|---|
| Concrete Masonry Unit (CMU) | 8″ | 1.11 |
| Concrete Masonry Unit (CMU) | 12″ | 1.28 |
| Concrete 60 pounds per cubic foot | 1″ | 0.52 |
| Concrete 70 pounds per cubic foot | 1″ | 0.42 |
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.
Do you want a low or high R-value?
Typically, a higher insulation R rating means better climate control and better energy efficiency for your home. A higher insulation R-value usually means a higher price point as well. For every type and material of insulation, check the R-value per inch of thickness that the manufacturer has listed.