Insulation Zones

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Recommeded Levels of Insulation to Achieve Deemed-T-Satisfy Rule for Energy Efficiency in an Unventilated Roof And Ceiling Construction
Climate Zones 1
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more
than 0.55)
3.7
Direction of heat flow Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering
& plasterboard only)
0.35 – 0.40
Estimated Minimum added R-Value of Insulation (m².K/W) 2.30 – 3.35
Generic Insulation Products Density Kg/m³ Thermal Conductivity

W/(m.k.)

Recommended
deemed-tosatisfy
min
thickness
(mm) of
insulation
product
Flexible Mineral/Rockwool 60-120 0.033 115
Note 1: Thermal Conductivity used for calculation of recommended thicknesses of insulation materials as per TIASA Protocol for Routine Testing for naturally ventilated buildings. Thermal efficiencies are dependant on materials thickness, density, age, operating temperature and moisture. Thicknesses rounded-up to nearest production standard. This is a guideline for general design purposes. For critical design purposes; i.e. rational design, contact manufacturers for actual R-values (Thermal Resistance (m²K/W)) and valid test reports and refer to ISO 10456.Note 2: The aforementioned deemed-to-satisfy recommended levels of insulation could be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account. Rational assessment is always an alternative to deemed-to-satisfy provisions.Note 3: Actual R-Values for roof construction systems are established through testing in accordance with ASTM 1363 in the Rotatable Guarded Hot Box with
SAFIERA. Specifiers are encouraged to obtain these test results from the thermal insulation manufacturers.
Recommeded Levels of Insulation to Achieve Deemed-T-Satisfy Rule for Energy Efficiency in an Unventilated Roof And Ceiling Construction
Climate Zones 2
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more
than 0.55)
3.2
Direction of heat flow Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering
& plasterboard only)
0.35 – 0.40
Estimated Minimum added R-Value of Insulation (m².K/W) 2.30 – 3.35
Generic Insulation Products Density Kg/m³ Thermal Conductivity

W/(m.k.)

Recommended
deemed-tosatisfy
min
thickness
(mm) of
insulation
product
Flexible Mineral/Rockwool 60-120 0.033 100
Note 1: Thermal Conductivity used for calculation of recommended thicknesses of insulation materials as per TIASA Protocol for Routine Testing for naturally ventilated buildings. Thermal efficiencies are dependant on materials thickness, density, age, operating temperature and moisture. Thicknesses rounded-up to nearest production standard. This is a guideline for general design purposes. For critical design purposes; i.e. rational design, contact manufacturers for actual R-values (Thermal Resistance (m²K/W)) and valid test reports and refer to ISO 10456.Note 2: The aforementioned deemed-to-satisfy recommended levels of insulation could be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account. Rational assessment is always an alternative to deemed-to-satisfy provisions.Note 3: Actual R-Values for roof construction systems are established through testing in accordance with ASTM 1363 in the Rotatable Guarded Hot Box with
SAFIERA. Specifiers are encouraged to obtain these test results from the thermal insulation manufacturers.
Recommeded Levels of Insulation to Achieve Deemed-T-Satisfy Rule for Energy Efficiency in an Unventilated Roof And Ceiling Construction
Climate Zones 3
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more
than 0.55)
2.7
Direction of heat flow Down & Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering
& plasterboard only)
0.35 – 0.40
Estimated Minimum added R-Value of Insulation (m².K/W) 2.30 – 3.35
Generic Insulation Products Density Kg/m³ Thermal Conductivity

W/(m.k.)

Recommended
deemed-tosatisfy
min
thickness
(mm) of
insulation
product
Flexible Mineral/Rockwool 60-120 0.033 80
Note 1: Thermal Conductivity used for calculation of recommended thicknesses of insulation materials as per TIASA Protocol for Routine Testing for naturally ventilated buildings. Thermal efficiencies are dependant on materials thickness, density, age, operating temperature and moisture. Thicknesses rounded-up to nearest production standard. This is a guideline for general design purposes. For critical design purposes; i.e. rational design, contact manufacturers for actual R-values (Thermal Resistance (m²K/W)) and valid test reports and refer to ISO 10456.Note 2: The aforementioned deemed-to-satisfy recommended levels of insulation could be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account. Rational assessment is always an alternative to deemed-to-satisfy provisions.Note 3: Actual R-Values for roof construction systems are established through testing in accordance with ASTM 1363 in the Rotatable Guarded Hot Box with
SAFIERA. Specifiers are encouraged to obtain these test results from the thermal insulation manufacturers.
Recommeded Levels of Insulation to Achieve Deemed-T-Satisfy Rule for Energy Efficiency in an Unventilated Roof And Ceiling Construction
Climate Zones 4
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more
than 0.55)
3.7
Direction of heat flow Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering
& plasterboard only)
0.35 – 0.40
Estimated Minimum added R-Value of Insulation (m².K/W) 2.30 – 3.35
Generic Insulation Products Density Kg/m³ Thermal Conductivity

W/(m.k.)

Recommended
deemed-tosatisfy
min
thickness
(mm) of
insulation
product
Flexible Mineral/Rockwool 60-120 0.033 115
Note 1: Thermal Conductivity used for calculation of recommended thicknesses of insulation materials as per TIASA Protocol for Routine Testing for naturally ventilated buildings. Thermal efficiencies are dependant on materials thickness, density, age, operating temperature and moisture. Thicknesses rounded-up to nearest production standard. This is a guideline for general design purposes. For critical design purposes; i.e. rational design, contact manufacturers for actual R-values (Thermal Resistance (m²K/W)) and valid test reports and refer to ISO 10456.Note 2: The aforementioned deemed-to-satisfy recommended levels of insulation could be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account. Rational assessment is always an alternative to deemed-to-satisfy provisions.Note 3: Actual R-Values for roof construction systems are established through testing in accordance with ASTM 1363 in the Rotatable Guarded Hot Box with
SAFIERA. Specifiers are encouraged to obtain these test results from the thermal insulation manufacturers.
Recommeded Levels of Insulation to Achieve Deemed-T-Satisfy Rule for Energy Efficiency in an Unventilated Roof And Ceiling Construction
Climate Zones 5
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more
than 0.55)
2.7
Direction of heat flow Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering
& plasterboard only)
0.41 – 0.53
Estimated Minimum added R-Value of Insulation (m².K/W) 2.15 – 2.29
Generic Insulation Products Density Kg/m³ Thermal Conductivity

W/(m.k.)

Recommended
deemed-tosatisfy
min
thickness
(mm) of
insulation
product
Flexible Mineral/Rockwool 60-120 0.033 80
Note 1: Thermal Conductivity used for calculation of recommended thicknesses of insulation materials as per TIASA Protocol for Routine Testing for naturally ventilated buildings. Thermal efficiencies are dependant on materials thickness, density, age, operating temperature and moisture. Thicknesses rounded-up to nearest production standard. This is a guideline for general design purposes. For critical design purposes; i.e. rational design, contact manufacturers for actual R-values (Thermal Resistance (m²K/W)) and valid test reports and refer to ISO 10456.Note 2: The aforementioned deemed-to-satisfy recommended levels of insulation could be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account. Rational assessment is always an alternative to deemed-to-satisfy provisions.Note 3: Actual R-Values for roof construction systems are established through testing in accordance with ASTM 1363 in the Rotatable Guarded Hot Box with
SAFIERA. Specifiers are encouraged to obtain these test results from the thermal insulation manufacturers.
Recommeded Levels of Insulation to Achieve Deemed-T-Satisfy Rule for Energy Efficiency in an Unventilated Roof And Ceiling Construction
Climate Zones 6
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more
than 0.55)
3.5
Direction of heat flow Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering
& plasterboard only)
0.35 – 0.40
Estimated Minimum added R-Value of Insulation (m².K/W) 3.10 – 3.15
Generic Insulation Products Density Kg/m³ Thermal Conductivity

W/(m.k.)

Recommended
deemed-tosatisfy
min
thickness
(mm) of
insulation
product
Flexible Mineral/Rockwool 60-120 0.033 100
Note 1: Thermal Conductivity used for calculation of recommended thicknesses of insulation materials as per TIASA Protocol for Routine Testing for naturally ventilated buildings. Thermal efficiencies are dependant on materials thickness, density, age, operating temperature and moisture. Thicknesses rounded-up to nearest production standard. This is a guideline for general design purposes. For critical design purposes; i.e. rational design, contact manufacturers for actual R-values (Thermal Resistance (m²K/W)) and valid test reports and refer to ISO 10456.Note 2: The aforementioned deemed-to-satisfy recommended levels of insulation could be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account. Rational assessment is always an alternative to deemed-to-satisfy provisions.Note 3: Actual R-Values for roof construction systems are established through testing in accordance with ASTM 1363 in the Rotatable Guarded Hot Box with
SAFIERA. Specifiers are encouraged to obtain these test results from the thermal insulation manufacturers.