There are many different types of insulation available for residential and commercial use in South Africa. Conducted and Convected heat is mainly resisted by bulk ceiling insulation. It traps the heat in pockets within its structure. Thermal resistance is really the same. It doesn’t really matter which way the heat flows through it. When broken down into categories you would have:

  • Reflective insulation
  • Bulk insulation

 

Bulk Insulation – Types of insulation

 

There are many different types of insulation on the South African market. In recent years we have seen more insulation products entering the market. Some even being imported for over seas. Below is a list of some high preforming insulation products available:

 

 

When selecting an insulation product make sure to select a product that is compliant with the SANS 10400-xa building laws. If you live in Johannesburg or Western Cape you should be using the 135mm products. Durban can use the 100mm products where it doesn’t get too cold.

 

Reflective Insulation – Types of insulation

 

Insulations with reflective properties are used to resist radiant heat flow, this is because of its high reflectivity and it also has low emissivity (ability to re-radiate heat). Reflective insulation relies on a 25mm layer of air next to the shiny surface. Heat flow through the product changes, depending on which way the heat is flowing through the product.

Reflective insulation is an aluminum foil (shiny) laminated to plastic or paper and comes in long rolls. When dust settles on the reflective surface it slowly starts to reduce its performance. Always face the reflective surfaces downwards or keep them vertical. With single sided foil the antiglare surface should always face outwards or upwards.

Reflective insulation R-values are supplied as up and down values. Depending on where and how the reflective insulation is installed will change the products total R-value. Make sure system values given by the manufacturer relate to your situation.

  • 45% on cooling and heating energy can be saved with roof and ceiling insulation
  • 20% additional cooling and heating energy with wall bulk insulation
  • 5% on winter costs with the right floor insulation used on your home