It will bring your home to a thermal comfort level that will require the minimum intervention of electrical space heating and cooling.

Radi-Therm - The ultimate ‘2 in 1’ Foil Reflective Ceiling Insulation Solution for your home.

Energyweb - Roof Insulation

Best combination

Radi-Therm ceiling insulation combines the best properties of bulk, as well as reflective insulation materials. It will bring your home to a thermal comfort level that will require the minimum intervention of electrical space heating and cooling.
Energyweb - Roof Insulation

2 in 1 Insulation solution

Radi-Therm is a “2 in 1” Insulation solution, which combines two types of insulation materials into one product. The product consists of reflective foil insulation and bulk Polyester fibre, with the result that 93% of the radiant heat is reflected away and cannot penetrate through the ceiling.

It will bring your home to a thermal comfort level that will require the minimum intervention of electrical space heating and cooling.

Radi-Therm Ceiling Insulation combines the best properties of bulk, as well as reflective insulation materials.

Radi-Therm is a “2 in 1” Insulation solution, which combines two types of insulation materials into one product. The product consists of reflective foil insulation and bulk Polyester fibre, with the result that 93% of the radiant heat is reflected away and cannot penetrate through the ceiling. Radi-Therm insulation material has set the benchmark by addressing all three of the following heat transfer principles:

Reflectivity:

The aluminium foil layer reflects 93% of the thermal heat.

Conductivity:

The thick polyester layer stops the direct transfer of heat through the material – a top-quality SABS APPROVED virgin Polyester fibre.

Convection:

The fibre stops the movement of heated air, stopping the convection loop. This foil side also provides a much-needed vapour barrier.

Fully recyclable:

Made from recycled PET bottles and fully recyclable, which makes it 00% eco-friendly. Comes in safe and simple rolls which are easy to install. (non-allergenic, non-irritant and very flexible. No special health and safety precautions are required when installing the product.

Safe to use:

The product will not absorb any water, and will dry naturally should it be exposed to small amounts of water. Fire tested and is safe to use in both residential and commercial applications, and will not contribute to the spread of flame, but rather self-extinguish once heat source is removed.

Non toxic:

It's also non toxic, does not contain any chemical additives and is completely odourless. It does not degrade over time and retains loft maintenance free.

Insulation requirements for Pretoria and Johannesburg

The RADI-THERM Roof Insulation in Pretoria and Johannesburg is a strong established brand in Gauteng.

It is a durable product with a tough lamination foil lining attributing incredible energy saving ability. The Roof Insulation installed by Energyweb in Pretoria and Johannesburg drastically improves the thermal comfort levels of your home.

How Insulation Works

Reflective Insulation

Ceiling insulation that REFLECTS the radiant thermal heat. 

radiant barrier (foil Insulation) blocks and reflects heat back to where it came from.  This is the most effective way to reduce the amount of heat entering your home. It is of utmost importance to use high-quality reflective insulation that will REFLECT at least 90% of the Radiant heat and will last for many years. Using a substandard product will reduce the lifespan of the product and also the effectivity.
Roof Insulation, Ceiling Insulation

Bulk Insulation

A thick Polyester fibre material with thermal properties, that reduces (RETARDS) heat transfer into the house (summer) or heat loss out of the room (winter).

Bulk insulation, with time, will become saturated with dust because of the air movement in the roof and moisture in the air. This causes the insulation to lose its thermal properties and basically conduct the heat flow without insulating anymore. Radi-Therm protects the bulk insulation with the foil layer which is laminated on top of the material. This way, the infiltration of dust and movement is drastically reduced – making this a high quality product which will last and be effective much longer RADI-THERM Foil Laminated Insulation – the ultimate ceiling insulation where all these properties are combined into one- product.
Reflective Isobooster Roof Insulation

Frequently Asked Questions

The RADI-THERM product is pre-packed in plastic bags and fits into the width of the standard roof rafter spacing. The product is rolled out in between the roof rafters with the foil facing up.

The installation teams access the roof space through the manhole cover and simply rolls the product in between the roof rafters. The typical time for installation of a standard 200 to 300 square metre house ceiling voids is on average a morning of three to four hours.

YES, it is ABSOLUTELY possible to install the ceiling insulation product yourself. Radi-Therm is a non-itchy, non-irritant and 100% safe to use product which does not require any specific safety wear for installation. Radi-Therm is easy to handle and can be installed even by one person – if you have the necessary skills set to move around in the ceiling space, and know the safe procedure of where you can place your feet without damaging the ceiling boards.

If you have a plumbing or Electrical Contractor or teams that are confident enough to move in the roof space, they can definitely install the product given the fact that it’s rolled out in between the roof rafters with the foil facing up.

ENERGYWEB has a confidant installation team who will be able to handle your full installation – giving you the peace of mind of a proper installation by qualified and trained personnel.

The South African building code SANS 10400 stipulates insulation minimum ceiling insulation values for the specific climatic regions within South Africa. As example the Gauteng area is recommended as a minimum thermal R-value of 3.6. To achieve this building regulation R-value of 3.6 the maximum thickness of 140 millimetre with foil facing needs to be installed.

However even the 50 mm fibre with foil does create a significant change in your thermal comfort levels in your home. Each family has various capacities and needs regarding their insulation – therefore we assist the customer to find the optimal solution for each application based on their needs.

Majority of installations is however 75 mm as well as 100mm thick insulation with the foil facing.

RADI-THERM is manufactured from a Virgin polyester fibre material, which is laminated using an environmentally friendly pressure-sensitive rubber-based adhesive that bond the Aluminium foil facing to the fibre.

The material requires no special safety equipment to handle as all the materials are environmentally friendly as well as non-irritant rated products.

RADI-THERM ceiling insulation has been tested against all the required SABS testing legislation in Southern Africa. The roof insulation was also tested by the fire lab at the CSIR with a resultant approval to be used as roof insulation material.

The polyester fibre material is a hollow based fibre which is bonded, using a low-melt polyester bonded agent as well. The bonding ensures that the long length fibres are bonded together to give you the solid mat insulation that’s installed in the roof.

The bonded mat is the final high-quality product that is installed in the roof cavity and is a solid construction without any glass fibre related irritant properties. The respiratory risk associated with conventional fibre mat materials, bonded with resins, is not applicable to the polyester fibre.

The polyester fibre is a respiratory non-risk product and does not break down into a dust that seeps through the ceiling boards on the side of the cornices like the older conventional fibre type products. The foil lamination further protects the bulk fibre mat by keeping moisture and dust out of the insulation.

R-value is a technical term that refers to the insulation retarded value of a specific thickness of insulation material, and how long that material can retard the flow of thermal energy or heat through that material of insulation product.

The R-value gives us a technical comparison between the various insulation products available in the market. The insulation values differ between the various thicknesses; however, the values are available on our website. The 140mm foil-faced RADI-THERM product has an R-value sufficient enough to comply to the building regulations. The higher the R-value the better the insulation properties.

The SABS test have shown that our roof insulation is both fungal and rodent resistant. This implies that rats cannot eat and sustain life from the roof insulation polyester material. However, rats are very robust household vermin creatures and will even chew on electrical cables. Rats could destroy portions of the roof insulation material if they are in the roof space and use it to make nests.

Youtube Videos

Ceiling Insulation BENEFITS for foil faced Polyester laminated insulation - Wally Weber
Ceiling Insulation FITMENT training for foil faced Polyester laminated insulation