Ceiling Insulation
February 23, 2015
Insulation for Cold Homes
May 1, 2016
Roof Insulation

In this post, we look at the benefits of Roof Insulation as well as the types of Roof Insulation products on the market in South Africa. Insulation for Roofs is an important factor in any new home or existing home.

Let’s have a look at the advantages of Roofing Insulation and what types of Roof Insulation products are the most effective. As we know there are many Roof Insulation products available in South Africa. However, not all Roofing Insulation products are equal.

What is Roof Insulation?

Very simply put the name says it all. Insulation for your roof space is designed to reduce heat flow into the home via the roof space in summer. And in winter the reverse reduces the heat flow out of the home.

How this works is quite simple. All Insulation products for Roofs must have an accepted fire rating as per the new SANS legislation. Secondly, all Ceiling Insulation products must have the correct R-value as per the new building legislation.

Considerations When Selecting Your Roof Insulation

Firstly, consider the benefits of the insulation including the R-value. And secondly, consider the fire rating. These are the most important factors to consider. Next on the list is safety and lifespan.

R-value of Insulation for Roofs.

R-value of Insulation is the ability of the given Insulation product to reduce heat flow into the home and out of the home. So, all insulation products will have to be graded by the SABS as to the R-value requirements of the insulation.

In fact, the higher the R-value the better the Insulation properties will be. The Western Cape has been zoned to achieve a compulsory R-value of 3.70 including ceiling and Roof.

Johannesburg and Pretoria are also Zoned to achieve the R-value 3.70 including ceiling and Roof.

However, KZN is Zoned to achieve the R-value 2.8.

Fire Rating of Roof Insulation

The fire rating is also a very important part of this transaction. The best fire rating available is on the glass wool insulation products. With a fire rating Class, A/1 this product will not burn or sustain a flame in any way.

Polyester Insulation products like Isotherm Insulation have a B/B 1 / 2 fire rating. In fact, this fire rating means the insulation will not sustain a flame. What this means is that if you put a flame to Isotherm Insulation and take the flame away it will not continue to burn.

Cellulose fiber fire rating is also B/B 1 / 2. However, the reason we will not install this product is that with age this fire rating is known to reduce substantially. And with cones fitted over downlights, the Cellulose could become a major fire hazard.

Most homes have 40 watts downlights fitted. These lights reach temperatures of 270 degrees to 350 degrees. Having a cone over the lights can cause the paper to combust with the heat.

Another problem is the wires underneath the cone will get very hot and the cones can melt into the wires of the downlights and cause a short circuit. If your earth leakage does not trip this can become a disaster.

Why all Homes should be Insulated with Roof Insulation

Firstly, for energy saving, an insulated roof will reduce heat flow from the roof by as much as 90%. Secondly, years of comfort and to top it all if homeowners are using heating in winter and cooling in summer the Cost of Roof Insulation can be recovered in two to three years.

Another very important factor to consider is Global Warming. If we just look at weather patterns and how this has changed in the last few years, we all should conclude that Global Warming has become a major problem.

Heating and cooling in the home mean more energy and more and more Carbon Foot Print. The importance of reducing the need for heating and cooling has become more important now than ever before.

 Roof Insulation Benefits

Roof Insulation Products like the Isotherm Insulation is the best in our opinion. This is why we rate this product so highly after 31 years in the Insulation industry.

  • Cool in Summer
  • Warm in Winter
  • Save Energy
  • Isotherm Insulation is one of the only Insulation products that is baby safe.
  • Isotherm is Dust Free and Allergy free.
  • This Insulation product has a 30-year manufacturer guarantee.

 Comfort with Isotherm Roof Insulation

Properly insulated houses provide the users with exceptionally comfortable indoor temperatures. And therefore fewer energy bills, and much-improved control over temperature that cost you money over the long run.

Home comfort is increased substantially with between 4 to 8 degrees improvement in summer and winter. This reduces the need for heating and cooling.




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