Ceiling insulation like aerolite and isotherm become the heat flow barrier between your roof tiles and ceiling. It prevents heat from passing through. Keeping you cooler in summer and warmer in winter.

Furthermore, well designed and insulated homes. That use an insulation that meets the South African requirements. Will give year round comfort. Additionally it will cut the heating and cooling costs. Which in turn reduces greenhouse gas emissions. Choosing the best ceiling insulation for your situation is an important factor too.

The appropriate thickness will be influenced by climatic conditions. You will need to establish if you are trying to keep the heat in, out or both. Ceiling insulations are effective against daily temperature change as well as seasonal.


Design Technique And Ceiling Insulation

Another important factor when it comes to properly insulating your home or office, is design technique. If ceiling insulation is installed in an area. That does not have shading or curtains thick enough. To block out morning and afternoon sun. You could get a reverse effect. You can create an oven effect if heat comes through your windows and gets trapped under the new roof installation.

Moisture problems like condensation. Can be eliminated by installing reflective ceiling insulation. Furthermore, can help assist with weather proofing your home or office. Aerolite and Isotherm ceiling insulation also have excellent sound absorption properties and is good for soundproofing a room or office. It is best to get the roof installation installed during construction. All new homes must be insulated according to the new building regulations. They must achieve a curtain R-value in order to be compliant.

Ceilings, floors and roofs. Have a small thermal resistance on their own. Not enough to be compliant with the sans 10400-xa building laws. Your new roof installation will need to be bulk insulation.

You will need to install a product with the right R-value for your climatic region. It must be compliant with the sans 10400-xa building laws.


Choosing Ceiling Insulation

When choosing the right ceiling insulation, there are two main categories to choose from – reflective or bulk roof installation. You can get an even greater insulating effect by combining reflective and bulk insulation.

Examples of combined insulation would be factorylite. Which is aerolite combined with a reflective insulation. Isofoil which is isotherm combined with a reflective insulation. The R-value of the product determines the products ability to resist heat flow. The higher the R-value, the better insulating affect you will get out of the product.


Aerolite and Isotherm Bulk Ceiling Insulation

Bulk insulation is excellent for resisting convected and conducted heat. The air pockets inside the insulation traps the heat. Thermal resistance works the same way, and it make no difference which way the heat flows through it.

Additionally, bulk insulation and reflective insulation are the two types of insulations currently on the market. The Leading bulk insulations are think pink aerolite. Which is a glasswool roof product. Isotherm ceiling insulation which is a polyester material. Bulk insulation comes with an R-value. Which differs according to which thickness of insulation you require.


  • 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


Read more on the advantages of solar energy or the advantages of wind energy.


Reflective Insulation

Radiant heat flow is resisted by insulations with reflective properties. This is achieved because the insulation is highly reflective and its ability to re-radiate heat. There is a 25mm layer of air that the reflective insulation relies on next to the shiny surface. Heat flows differently through reflective insulation depending on which direction the heat source is coming from.

Reflective foil is made from aluminum and is laminated to paper or plastic. You can get a decrease in performance from reflective insulation when dust settles on it. Dust reduces its ability to reflect. The shiny foil surface should always face downwards. The anti-glare surface of single sided foil should always face upwards or outwards.

Up and down R-values are supplied with reflective insulation. You get a different R-value for each thickness. Always make sure the values given by the manufacturer relate to what you are looking for.


Gaps in Insulation

When installing any kind of roof insulation, you need to avoid leaving any gaps. Even the smallest gap in the roof insulation can decrease the insulating value. You need to install the roof insulation snugly between the beams. Additionally, you must not leave any gaps in the roof once installed.

Furthermore, you need to seal joins and holes in reflective insulation. Even taped up if necessary. You can leak a large amount of heat. Through the ceilings, floors and walls. So make sure these areas are properly insulated. When installing roof insulation. You need to leave the right amount of space around down lights and transformers. Overheating can cause a problem in your roof.

Wall insulation needs to fit snugly around door and window frames. Additionally, in really cold locations you should have thermal breaks around metal frames to reduce heat loss. You should insulate the internal walls in your house. This will soundproof the room and give less echo.


Do Not Compress Roof Insulation

Furthermore, never compress bulk roof insulation! This reduces the roof installations ability to insulate properly. Of course tiny air spaces within the roof insulation traps the hot air. Additionally, in order for the roof installation to maintain its thickness. Likewise, you must leave sufficient space. Vapour barriers such as sisalation or spunsulation. Can infact be utilized to keep the moisture off the bulk roof insulation. Moisture could cause a decrease in the products insulating performance. Use reflective roof insulation vapour barriers where condensation may occur.

Not to mention, you cant install loose fill insulation on a 25 degree slope or more. Due to it being loose and not in a roll for like aerolite or isotherm. You can’t maintain its thickness on angles.

Roll form roof insulation is the best route to take when insulating your home or office. Additionally, the product installed will keep its thickness constant and not reduce R-values in curtain areas. Regardless of slopes and strong winds that can blow loose insulation around your roof. Furthermore, loose fill roof insulation will settle by up to 25 percent. Over a period of time reducing its original thickness. Read more on living life in the green zone.

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