Elite QandA


What is R-value of concrete block wall?


  1. What is R-value of concrete block wall?
  2. Does concrete have an insulation value?
  3. What is the R-value of 1 inch Styrofoam?
  4. Do thick walls need insulation?
  5. What is the R-value of pine wood?
  6. How thick should wall insulation be?
  7. How thick should cavity wall insulation be?
  8. What is the thinnest insulation with the highest R-value?
  9. What is standard wall insulation R value?
  10. Is 50mm cavity wall insulation enough?
  11. What is a good U value for a wall?

What is R-value of concrete block wall?

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.

Does concrete have an insulation value?

Concrete floors have a reputation for being cold, and it's true that concrete has a lower insulating value than most other building materials.

What is the R-value of 1 inch Styrofoam?

Styrofoam insulation is the cheapest material. R-values can range from 3.6 to 4.2 per inch.

Do thick walls need insulation?

The thicker they are, the less they lose. A 9 inch brick wall is actually quite a good insulator if it is DRY. You lose heat rapidly if it is damp. Now then - a dry wall becomes even better at insulating if it is thicker.

What is the R-value of pine wood?

The R-value for wood ranges between 1.41 per inch (2.54 cm) for most softwoods and 0.71 for most hardwoods. 3/4" would be 3/4 of 1.4 or about 1.

How thick should wall insulation be?

The insulation is usually made from one of several forms of foamed plastic. It should normally be at least 60mm thick, and can be up to 100mmm. The actual thickness required will depend on the material used - Insulation boards are fixed straight onto the wall using continuous ribbons of plaster or adhesive.

How thick should cavity wall insulation be?

For example, a 'standard' cavity wall needs 70mm of PUR to achieve the Building Regulation's maximum U value of 0.30, whereas mineral wool needs 120mm.

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

Aerogel insulationAerogel 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 standard wall insulation 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. See the Department of Energy's (DOE) ranges for recommended levels of insulation below.

Is 50mm cavity wall insulation enough?

Applying 50mm of external solid wall insulation helps reduce the likelihood of these hot and cold spots. However, due to the thickness only being 50mm there is still a chance of cold bridging, which is the main cause of cold spots within the home.

What is a good U value for a wall?

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.



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