Why do concrete blocks have good thermal performance?

Thermal resistance of concrete block used in the wall is very low. Its thermal insulation value is enhanced by using thermal insulation as parallel layer to the block in the wall. Such arrangement gives higher thermal resistance and low thermal transmittance.

What is the best material for thermal mass?

Water is one of the best thermal mass materials. It is because it has the highest specific heat capacity among all different materials. Many factors determine the efficiency of thermal mass materials. Efficiency refers to how good a material is at absorbing, storing, and releasing heat.

Is high thermal mass good?

Using thermal mass appropriately can improve the thermal performance of your home. Using it inappropriately can make your home less comfortable and increase your energy bills. High thermal mass is beneficial in climates where there is a reasonable difference between day and night temperatures.

Is cement block a good insulator?

Cinder block walls have an extremely low R-value, ranging between 1.9 and 2.5. The recommended value for an exterior wall is between R-13 and R-23. Therefore, a cinder block wall, without any additional material, has very little insulating properties.

Does concrete insulate heat?

While concrete is a very strong and reliable building material, it’s a terrible insulator. Hot and cold pass right through it. In the building industry we call materials like concrete a thermal bridge. Any heat inside the home will pass right through the concrete with very little resistance.

What building material is best for cold weather?

Best Building Materials For Cold Climates

  • Brick. Bricks are a solid and durable building material that is also affordable. …
  • Stone. Like brick, stone is also good building material. …
  • Concrete. Concrete is an incredibly durable building material. …
  • Plastic. …
  • Wood. …
  • Metal.

Which building material has the highest thermal conductivity?


Diamond is the leading thermally conductive material and has conductivity values measured 5x’s higher than copper, the most manufactured metal in the United States. Diamond atoms are composed of a simple carbon backbone that is an ideal molecular structure for effective heat transfer.

Does concrete have good thermal properties?

Concrete has a high thermal mass with properties similar to brick and stone. It is possible to absorb heat from the atmosphere in warm weather and release it during cooler periods, e.g. overnight.

Are cinder block walls energy efficient?

Concrete block houses are energy-efficient, fire-resistant, noise-reducing, pest-resistant, low-maintenance, and healthy.

Do concrete block walls need insulation?

Cement block walls, concrete block walls, or cinder blocks – they’re the same thing, and in your case, those existing walls need insulation. You’ve landed on injection foam insulation as the best solution for your comfort and energy efficiency issues related to your existing walls.

Are concrete walls energy efficient?

Just looking at a piece of lumber and then a concrete masonry block makes it clear why concrete homes are more energy efficient than wood-frame homes. Concrete’s mass slows down the passage of heat moving through the wall.

Is concrete thermally efficient?

Due to its high specific heat and the considerable volume in a house, concrete possesses a natural advantage in heat storage capacity (thermal mass). When used in passive solar design, concrete’s thermal mass can contribute significantly to reducing energy consumption, while maintaining occupancy comfort.

Does concrete work as insulation?

It is true that concrete is not a good insulator and feels cold, but with this method, the concrete is encapsulated in rigid insulating foam. The foam provides the energy efficiency and the concrete provides the strength. The concrete inside the foam also adds thermal mass to the house.

What is the R-value of concrete block?

Tables of Building Material R-values

Concrete Masonry Unit (CMU) 4″ 0.80
Concrete Masonry Unit (CMU) 8″ 1.11
Concrete Masonry Unit (CMU) 12″ 1.28
Concrete 60 pounds per cubic foot 1″ 0.52

Does cinder block retain heat?

A wall’s thermal resistance, or its R-value, is its ability to slow the transfer of heat from one side to the other. Concrete block makes a cost-effective and structurally sound wall, but it has little thermal resistance.

Should concrete blocks be filled?

Considering everything, filling your cinder blocks isn’t exactly necessary, but it is completely safe, assuming you don’t add dirt in it. Filling cinder blocks can help you make the structure sturdier or improve insulation, while a mix of gravel and sand can actually help you achieve both.

Can you insulate concrete block walls?

Answer: You can’t. And there is no effective way to fill the voids in an existing concrete-block wall. Your only option is to cover the inside of the exterior walls with a continuous layer of insulation, as though you were insulating a basement wall.

What is the best way to insulate a block wall?

The simplest and most affordable method of insulating the interior of a block wall is to install rigid foam board insulation. Available in large, three-by-five or four-by-eight sizes, the panels are lightweight and held in place with special foam-safe glue.

How do you insulate exterior concrete block walls?

Depending on whether the concrete block walls will be covered or if the top of the wall is exposed can really change the way they are insulated. The option for insulating concrete block walls includes spray foam insulation, injection foam insulation, polystyrene beads, foam boards, and loose-fill masonry insulation.