Technical

Technical definitions and information

If you are a home owner, contractor or architect seeking to under some key points regarding insulation and the more technical aspects as to how exactly insulation works and manages to control temperature, this page will present you the basics. Below we will briefly explain key point's specific to Thermguard cellulose fibre insulation as well as general figures pertaining to roof structures and values they represent.

R-Value

  • When talking about the SANS 10400-XA home insulation requirements we often refer to an insulation materials R –value. The R-value is a measure of thermal resistance. It is expressed as the thickness of the roof insulation material divided by the thermal conductivity. In non-technical language, R-value measures how effectively a roof insulation material slows the flow of heat from a warmer to a colder area. Hence, the higher the R-value of the roof insulation material, the better it insulates. It is expressed as (m².K/W)
  • Total R-Value is the sum of all roofing components combined to form a final value. Typically this will comprise of the roof tile, air space between tile and ceiling, insulation (if insulate) and ceiling itself.

Embodied Energy

  • The energy that was consumed during manufacturing is often referred to as the embodied energy of a ceiling insulation material.

    Thermguard home insulation has a very low embodied energy as the major raw material, waste paper, has an effective value of zero. It merely has to be transported to the factory rather than to landfill sites. The milling of the product is a relatively low energy process. By contrast, processing of raw materials for glass fibre manufacture requires extraction and crushing of finite mineral resources by energy-intensive methods.

    Thermguard home insulation uses significantly less energy to manufacture than typical home insulations. It uses 12 times less energy than polystyrene, 15 times less than glass-fibre and 33 times less than polyurethane. Given South Africa’s energy crisis as well as the “Green- Building” requirements, the construction of buildings with a low embodied energy is an important objective for Architects

U-Value

  •  The U-Value addresses the ability of a material to conduct heat, while the R-Value measures the ability
    to resist heat flow. The higher the U-Value number, the greater the amount of heat that can pass through
    that material. A lower value would mean a better insulator. U-Value is expressed as (W/m².K)

Thermguard technical specifactions

Insulation thickness

R-Value

U-Value

Heat flow reduction

75mm

1.88

0.43

82%

115mm

2.88

0.30

87%

135mm

3.38

0.26

89%

The table represents the specifications of Thermguard Material R-Values only. The Total R-Value is specific to individual buildings and therefore not stated.

 

  • Thermal Conductivity: 0.040W/(m.k)

Summer conditions - heat flow downwards

Winter conditions - heat flow upwards

The table represents the specifications of Thermguard Material R-Values only. The Total R-Value is specific to individual buildings and therefore not stated.

 

  • Thermal Conductivity: 0.040W/(m.k)

Insulation thickness

R-Value

U-Value

Heat flow reduction

75mm

1.88

0.45

85%

115mm

2.88

0.31

90%

135mm

3.38

0.27

91%

Certification

  • Thermguard insulation has both ISO 9001:2015 Certification and the S.A.B.S. Mark
  • Thermguard is a member of TIPSASA, (Thermal Insulation Products & Systems Association SA).
  • Thermguard roof insulation is fire tested to SANS 10177 Part 5 and 10 test protocols. It does not support flame spread. It is classified B/B1/2
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