Heat, cold, sound


Youngman Roofing manufacture and has acquired the distribution rights for a number of insulation products.

The rationale for the acquisition is to enable Youngman Roofing to provide a complete solution as well as specialist advice for our clients.

These insulation products are used in various applications, from ceiling to under-floor insulation, roof-liners, etc. Youngman Roofing can now assist with both thermal and acoustic specifications, as well as providing accurate advice on where and how to use these products.

Insulation products


Manufactured from polyester fibre, Youngtherm is both kind to your pocket and your skin.


Boasts excellent acoustic as well as thermal performance in one product, Non-irritant, non-toxic and non-allergenic and Maintenance Free


ISOTHERM Thermal Insulation is suitable for roof, wall and geyser insulation.


LAMBDABOARD is a flexible faced Polyisocyanurate (PIR) insulation board made on a continuous laminator.


Envirotuff 203FR is a double sided commercial / industrial insulation, 6 layer paper based aluminium foil insulation used in commercial and industrial applications


Granric Flexiwool Insulation is manufactured from a high quality non-combustible flexible Glasswool with an inert binder which makes the product lightweight, safe and resilient.


Granric MBI is manufactured from high quality non-combustible flexible Glasswool insulation, with inert binder, which makes the product lightweight, safe and resilient. Granric MBI is faced on one or both sides with either a reinforced Foil, White metalized Foil or Black metalized foil.


Factorylite is an effective commercial and industrial roofing insulation. It is manufactured from high quality, non-combustible, flexible Glasswool.


Alububble is a superior performance radiant barrier material, simple to use, cost effective and will not propagate fire and does not present a fire hazard when installed in a building.


Sisalation is a high quality reflective foil insulation product that cost-effectively insulates and protects residential, commercial and industrial buildings against heat, cold, dust and moisture.


Poor standard of insulation in buildings causes increases in power use and pressure on the electricity grid. Buildings should meet Professor Fanger's thermal comfort theory. This theory relates to levels of comfort. For thermal insulated, naturally ventilated buildings the range should be 7°C around the thermal neutral zone, which is approximately 23°C (where 90% of people are comfortable) dropping to a range of between 10°C and 32°C (where 20% of people are comfortable). The goal is achieve 80% of the above.

Well designed buildings, with good quality insulation, improve health, productivity, reduce electricity costs and reduce the effects on the environment namely green house gases. Upon implementation of the new regulations regarding thermal insulation, up to 4500MW of electricity will be saved. Minimum thermal values will be legislated these will vary from region to region the proposed R-Values;

Roofs equate to 50 - 60% of heat load, and will need R-values of between 2.70m²K/W to 3.70m²K/W, which equates to insulation of between 80 - 150mm thick depending on the roof type. The insulation levels can also be made up of various layers of insulation such as foil, fiber and insulated ceiling.

Walls, which make up between 10 - 15% of the heat load, and will need R-values of between 1.90m²K/W to 2.20m²K/W.

Floors which loose approximately 10%, will need R-values of between 1.00m²K/W and 1.50m²K/W.

Insulation Principles: Thermal Principles

Heat is energy! Heat is a form of kinetic energy that moves from a hot area to a cold area. For insulation the flow of heat is broken down into Thermal Values:

Thermal conductivity (K-Value)

Co-efficient of a material is the amount of heat energy conducted by the specific material under standard conditions.

  • The thermal conductivity is measured in Watts conducted per meter degree temperature difference.
  • The units of K-Value (thermal conductivity) are: W/m°C (Celcius or centigrade) or W/mK (Kelvin).
  • The lower the K- Value, the better the insulation.

Thermal resistance (R)

Yes, 70% of your heat entering a building comes through the roof, and during the winter months, more than 60% of your heat loss is through your roof.

  • The thermal resistance that a specific thickness of material will provide is given by: R = t/k mK/W, where t = thickness.
  • The higher the better the Thermal resistance.

Thermal transmittance (U-value)
  • The U-value of a building system is the heat flow through the system per square meter for each degree Kelvin temperature difference across the system. It includes the co-efficient of thermal resistance of all surfaces of the system and the thermal resistance of the individual layers (i.e. external air space, roof sheets, ceilings etc) and can be calculated as follows:
  • Ut = ________1___________ where R is the resistance of each layer or surface. R1 + R2 + R3 …. Rn

System R-Value
  • Is the combination of all the R-Values (including all air gaps, materials etc)
  • The lower the R- Value the better the insulation.

Fire legislation
  • SANS 428 Fire Standard, a new standard that ensures that all insulation products are correctly classified to adhere to the new fire standards.
  • All Youngman products comply with SANS 428.

Acoustic principles

Acoustic design is generally overlooked when designing a building. Internal Acoustic design; sound absorption within a building, which improves working or living conditions, assists school children to concentrate etc. Roof Acoustic design; for sound transmission loss, from rain and wind noise. NRC value also assists. Two types of values that make acoustics important;

  • NRC, Noise Reduction Co-efficient which is the absorption of noise, the worst value is 0 and the best is 1, if the value is 0,5 it means that 50% of the noise is absorbed.
  • STL, Sound Transmission Loss is measured in Decibels (Db).
  • The higher the Db the better the product.


Alububble® is a superior performance radiant barrier material, simple to use and cost effective.

This product is manufactured using a modern sophisticated continuous laminating process which consists of a layer of low density Polyethylene air cells laminated on both sides with aluminium foil or alternatively on one side with a white polyethylene layer which provides an aesthetically pleasing finish to the underside.

Alububble® uses the thermos principal of providing a reflective barrier along with adjacent air space to keep the building cool in summer and warm in winter.

Alububble® will not propagate fire and does not present a fire hazard when installed in a building.


Sisalation® is a high quality reflective foil insulation product that cost-effectively insulates and protects residential, commercial and industrial buildings against heat, cold, dust and moisture.

Essentially Sisalation® is a lamination of aluminium foil to kraft paper, or woven cloth and reinforced with fiberglass and, in some products, flame retardant adhesive. It is economical and maintenance free.



Enviro-tuff is a range of strong, durable and cost effective insulation foil products that protect all residential, commercial and industrial buildings from heat gains and heat losses.

Enviro-tuff protects against conductive, convectional and radiant heat transfer by reflecting up to 97% of radiant heat from entering the building. During colder months, Enviro-tuff assists in keeping the heat from exiting the building. Enviro-tuff further protects against dust and moisture from entering a building.

Enviro-tuff has been extensively tested both locally and internationally, ensuring all products meet the local testing requirements and SANS standards.