Heat insulation

What is heat Insulation? Heat Thermal Insulation is the process involved in limiting heat transfer from one object to another by use of insulation materials manufactured in different shapes, sizes and density for different purpose use. A heat insulating material is a poor heat conductor thereby its inhibition of heat gain. Insulation is used in both living and comercial buildings to prevent heat gain through the roof, save on energy consumption in cooling the buildings, protect buildings against fire, protect the hot water piping systems of buildings from loosing hest, Preventing the heat transfer from the duct in the house and also increase comfort.

How do I choose the best Insulation Material?

With different Insulation materials to choose from, it is very difficult to decide the thickness of Insulation to use based on your specific needs. Our experts normally help, advise and recommend the right type of Insulation material thickness that will solve your problem. Our inhouse experts considers factors such as R-value, price, environmental impact, flammability, sound proofing and moisture permeability. Our products can be used anywhere including walls, ceilings, floors, hot pipes, furnace compartmentsand much more. Bellow are some of the most common Insulation materials manufactured and supplied by Jumbo Chem Kenya Limited:

  1. Roof Insulation
  2. Fabricated Container Insulation
  3. Wall Insulation (Sound proofing)

Roof Insulation

What is Roof  Insulation in Buildings?  Roof Insulation  is a material adopted to prevent heat transfer between outside and inside of the building. Nowadays Roof insulation has become an essential part of building construction due to its superior benefits.

Thermally insulated building roofs provides great comfort both in hot seasons and cold seasons.

  • A building’s roof fitted with thermal insulation requires less electricity to maintain the desired temperature conditions in the building. This saves on electric bills and extra costs by over 80%.
  • Roof and wall insulation when combined, shields the building interiors so that it’s less affected by the exterior temperature, thereby substantially reducing the building’s energy usage, as well

Benefits of Heat Insulation

General benefits of using insulation materials in living and comercial  buildings;

  1. No need of Air Conditioning Systems, cooler, heater etc.
  2. Thermal insulation prevents the roof deck from cracking.
  3. Expansion joints are not required in a structure during construction.
  4. The materials that are used in thermal insulation are lightweight than concrete which reduces the dead weight on the roof slab.
  5. Thermal insulating materials are manufactured from environmental friendly materials.
  6. It is easy to install.
  7. It is fire resistance.
  8. Maintenance is not required.

How houses gain or lose through Roofs

The use of Iron Sheets & Aluminium Sheets commonly known as Mabati is a very common practice in a number of countries and has been going on for many years.

In other cases, stone coated steel sheets commonly known as Roofing Tiles as well Shingles are also used in covering roofs. in addition, we have flat roofs made of concrete slabs as roof coverings.

All these roof covers allow heat to flow though them into or out of buildings
This is where our Jumbolene Roof Insulation, an effective thermal barrier, helps to reduce heat gain or lose by buildings.

Jumbolene Roof Insulation

Heat Gain or Lose though walls

Pre-fabricated houses are gaining ground in the Kenyan Construction industry. A number of players are now prefabricating houses, shops, offices, stalls, schools, cold storage, etc by use of shipping containers and Light-Gauge Steel.

These prefabs experience extreme heat or cold due to fast gaining or losing of heat through their walls and  top sections.

In addition, cold-storage facilities made of concrete walls (a compost of cement, ballast and sand) also gain or lose heat.

Jumbolene Container /Wall insulation a great solution in reducing such heat gain on lose.

Container/ Wall Insulation

Application of Thermal Insulation Materials

There are several areas where insulation materials can be used to minimize the loss of heat especially in ducts or hot water pipes as well as reduce heat radiation in the buildings through the Iron sheets(Mabati), Decra roofing, roofing tiles as well as gypsum ceilings. Some of the key areas that requires heat insulation materials include;

  • Building Roof’s Insulation
  • Fabricated container houses,offices etc
  • Wall Insulation especially for offices and other premises that are situated in a noisy environments
  • Hot water pipe insulation (Lagging)
  • Duct wrap insulation (Lagging)

Performance Terms used in Thermal Insulation

Thermal Conductivity / λ (lambda)

Thermal conductivity measures the ease with which heat can travel through a material by conduction. Conduction is the main form of heat transfer through insulation.  It is often termed as λ (lambda) value. The lower the lambda, the better the performance.

Heat Resistance (R)

Thermal Resistance is a figure that connects the Thermal Conductivity of a material to its Width – providing a figure expressed in resistance per unit area (m²K/W). Greater thickness means less heat flow and so does a low conductivity. Together these parameters form the thermal resistance of the construction. A construction layer with a high Thermal Resistance, is a good insulator; one with a low Thermal Resistance is a bad insulator.
The equation is Thermal Resistance (m²K/W) = Thickness (m) / Conductivity (W/mK)

Specific Heat Capacity

The Specific Heat Capacity of a material is the amount of heat needed to raise the temperature of 1kg of the material by 1K (or by 1oC). A good insulator has a higher Specific Heat Capacity because it takes time to absorb more heat before it actually heats up (temperature rising) to transfer the heat. High Specific Heat Capacity is a feature of materials providing Thermal Mass or Thermal Buffering (Decrement Delay).


The density refers to the mass (or ‘weight’) per unit volume of a material and is measured in kg/m3. A high-density material maximizes the overall weight and is an aspect of ‘low’ thermal diffusivity and ‘high’ thermal mass.

Thermal Diffusivity

Thermal Diffusivity measures the ability of a material to conduct thermal energy relative to its ability to store thermal energy. For instance, metals transmit thermal energy rapidly (cold to touch) whereas wood is a slow transmitter. Insulators have low Thermal Diffusivity. Copper = 98.8 mm2/s; Wood =  0.082 mm2/s.  
The equation is: Thermal Diffusivity (mm2/s) = Thermal Conductivity / Density x Specific Heat Capacity

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