# Thermablok^{®} Technical Support

### Thermablok Physical Properties

**Thickness**

**Max. Use Temperature**

**Color**

**Density**

**Hydrophobic**

**Material Form**

**R-Value**

0.40 in (10 mm)

390°F (200°C)

White or Gray

9.4 lb/ft^{3} (0.15 g/cc)

Yes

57 in (1,450 mm) wide 3/8" X 1.5" X 4.5' long

R-Value = 10.3 / inch

### Thermablok Standards Organization Test Results

**Test Procedure**

ASTM C 177

EN 12667

ASTM C 518

ASTM E 84

EN13501-1: 2007

ASTM C 165

Specific Heat

ASTM E 96

ASTM E 228

ASTM C 1104

**Results**

0.0131 W/m*K @ 10°C

0.0131 W/m*K @ 10°C

0.0148 W/m*K @ 2°C (avg of 3 samples)

Class A: FSI >5, SDI 20

Passed Euroclass C-s1,d0

8.0psi @ 10% strain, 30.5 psi @ 25% strain

1.00 J/g*K @ 40°C

1877 ng/Pa*s*m

^{2}(dry cup method)

X: 1.06 x 10

^{-5}K

^{-1}, y: 1.90 x 10

^{-5}K

^{-1}

Mass Gain = 1.08%

**Property**

Thermal Conductivity via Guarded Hot Plate

Thermal Conductivity via Guarded Hot Plate

Thermal Conductivity via Heat Flow Meter

Flame and Smoke Spread

Reaction to Fire Performance

Compressive Stress / Strain

Specific Heat

Water Vapor Transmission Rate

Linear Coefficient of Thermal Expansion (@ 10°C)

Water Vapor Sorption

### Common Insulators: R-Value / U-Value - Energy of Mfg / CO_{2} (Environmental Impact)

**Material**

Thermablok

Fiberglass

Polyisocyanurate

Polystyrene

(Expanded)

(Extruded)

**R-Value**

10.3 USA

1.813 Metric

3.8 USA

0.669 Metric

6.0 USA

1.056 Metric

4.5 USA

0.792 Metric

**U-Value***

(W/m-K)

(W/m-K)

0.014

0.040

0.024

0.032

**Energy /**

Mfg

Mfg

50.0

39.2

69.8

116.3

**CO**

Mfg

_{2}/Mfg

4.2

1.9

5.5

3.0

**Health & Safety**

No Known Hazards

(Occupants/Environment)

Some Fiberglass Contains

Formaldehyde - Toxic SbO

_{3}

Creates Hydrogen Cyanide

During a Building Fire

Contains Mutagens -

Suspected Carcinogens -

Some add Toxic HBCD

**Environment**

100% Recylable

(Air/Sand/Poly)

Recyclable

Thermoset - Plastic

Not Recycled

Petroleum Product

Polluting the Oceans

Little is Recycled

(Breaks down in the

Environment creating

Vinyl-Benzene)

Petroleum Product

Notes: R-value is expressed in ft^{2}•h•°F/Btu. U-value is expressed in W/m-K per standard convention.

- Thermal conductivity,
*k*, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Thermal conductivity is measured in watts per kelvin per metre (W•K^{−1}•m^{−1}). Multiplied by a temperature difference (in kelvins, K) and an area (in square metres, m^{2}), and divided by a thickness (in metres, m) the thermal conductivity predicts the power loss (in watts, W) through a piece of material. - Wall assembly R-values are computed and expressed in the U.S. in (ft
^{2}•h•°F/Btu). Thermablok U -value expressed using this measurement is 0.0971 (BTU-in/ft^{2}•h•°F). - Metric U-factors are defined as Watts per square meter per degree Celsius. To convert inch-pound Imperial U-values to metric U-factors, multiply by 5.678. To convert metric U-factors to Imperial inch-pound U-factors, divide by 5.678. To convert Imperial inch-pound R-values to metric R-values, multiply by 0.1761. One inch = 2.54 cms. One (RSI) U-factor coefficient = 5.678; one R-value = .1761 RSI.
- USA R Value X 0.176 = Metric R Value

### Wall R-Value losses from Thermal Bridging

**Nominal Framing**

Depth and Spacing

Depth and Spacing

2" X4" @ 16" Center

2" X 4" @ 24" Center

2" X 6" @ 16" Center

2" X 6" @ 24" Center

**"Labeled" Batt Insulation**

R-Values Between Studs

R-Values Between Studs

R-11

R-13

R-15

R-11

R-13

R-15

R-19

R-21

R-19

R-21

**Effective R-Values**

Batt Insulation / Steel Studs

Batt Insulation / Steel Studs

5.5

6.0

6.4

6.6

7.2

7.8

7.1

7.4

8.6

9.0

**Wall Thermal Loss**

R-Value

R-Value

50%

64%

67%

40%

45%

48%

63%

65%

55%

57%

### Meeting ASHRAE 90.1-2007 Building Envelope Requirements for U.S. Climate Zones

**Climate Zone**

1

2

3

4

5

6

7

8

**Nonresidential Requirements**

All occupancies other than residential

R-13 + 0 ci

U= 0.124

R= 10.6

R-13 + 0 ci

U= 0.124

R= 8.06

R-13 + 3.8 ci

U= 0.084

R= 11.90

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

**Residential Requirements**

Spaces in buildings used primarily for living and sleeping. Residential spaces include, but are not limited to, dwelling units, hotel/motel guest rooms, dormitories, nursing homes, patient rooms in hospitals, lodging houses, fraternity/sorority houses, hostels, prisons and fire stations.

R-13 + 0 ci

U= 0.124

R= 10.6

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 7.5 ci

U= 0.064

R= 15.63

R-13 + 15.6 ci

U= 0.042

R= 23.8

R-13 + 18.8 ci

U= 0.037

R= 27.0

### Basic Thermal Definitions

**Thermal conductivity** is an intensive property of a material that measures its capacity to sustain heat flow. The units of thermal conductivity are often provided in metric values of Watts/meter-degree Kelvin or W/m-K. The symbol used to denote thermal conductivity is k (or lambda, λ).

- There are many different unit conversions to Imperial and others:

1 BTU/ft hr F = 1.73 W/m-K or 1730 mW/m-K

12 BTU-in/ft2 hr F = 1 BTU/ft hr F = 1.73 W/m-K

1 BTU-in/ft2 hr F = 0.144 W/m-K or 144 mW/m-K - The reciprocal of thermal conductivity is thermal resistivity; an intensive property of a material to resist one-dimensional heat flow. Thermal resistivity has units of m-K/W.

**Thermal Resistance (R value)**

- R is thermal resistance, which is the capacity of a material to impede heat flow over a given area and at a specific temperature. The greater the value at a given set of conditions, the better the material will perform as a thermal insulator.
- The units of thermal resistance are provided in m
^{2}-K/W (or ft^{2}hr °F/BTU). - Thickness/k value = R value.
- Resistances of insulators in series can be added.
- R-value can be for whole thickness or normalized (e.g. R-value is 12 per in or 24 for 2 inches of R-12 per inch material).
- R/in = 144/k (in mW/m-K) -> 12 mW/m-K = 12 per inch R value.
- The reciprocal of thermal resistance is thermal conductance (also known as the heat transfer coefficient), with units of W/m
^{2}K. This value is frequently measured in systems as the overall heat transfer coefficient (OHTC). - Thermal resistance values are often used in the building and construction markets as a relative measure of thermal insulation performance for materials and systems.

**Heat Transfer Coefficient (U Value)**

- U values measure thermal conductance, a measure of a material or system to permit power flow per unit area and temperature change (W/m2 K).

- U-value is heat transfer coefficient.
- Low U values mean good insulation values (very similar to thermal conductivity k).
- OHTC -> Overall heat transfer coefficient; frequently used to measure the thermal conductance of systems.
- In the world of systems thermal engineering – U value and OHTC are often used synonymously.