Isotherm Polyester Insulation
145mm Isotherm Polyester Insulation
145mm Isotherm is a high-performance polyester insulation roll manufactured from recycled PET fibres. It provides a product R-value of 3.37, covers 6m² per roll and is suitable for residential insulation for ceilings and roof spaces.
R-Value
(R-value)
Product Overview
145mm Isotherm is a thick polyester insulation roll manufactured using recycled PET fibres. It provides a product thermal resistance of R3.37m²·K/W for insulation for ceilings and suitable roof spaces.
The manufacturer's reference roof and ceiling assembly has a total R-value of 3.77m²·K/W, including the contribution from roof and ceiling materials. Actual installed performance depends on the construction and installation.
Each roll measures 1.2m wide by 5m long, covering 6m². The nominal density is 11.5kg/m³, and the polyester fibres are soft and non-irritant to handle.
Key Benefits
- ✓ R3.37 product thermal resistance
- ✓ R3.77 manufacturer reference total R-value
- ✓ 6m² coverage per roll
- ✓ 1.2m × 5m roll dimensions
- ✓ 11.5kg/m³ nominal density
- ✓ Manufactured using recycled PET polyester
- ✓ Soft and non-irritant to handle
- ✓ B/B1/2 fire classification
Typical Application
Suitable for insulation for ceilings and roof spaces where the required thermal performance is achieved by the complete installed roof and ceiling assembly.
Technical Product Data
145mm Isotherm Technical Specifications
Product dimensions, thermal resistance, density, fire classification and other technical information for the 145mm Isotherm roll supplied by Home Insulations.
| Brand | Isotherm |
|---|---|
| Product type | Insulation for Ceilings |
| Material | Polyester Insulation |
| Thickness | 145mm |
| Roll width | 1.2m |
| Roll length | 5m |
| Nominal roll size | 1.2m × 5m |
| Coverage per roll | 6m² |
| Product R-value | 3.37m²·K/W |
| Manufacturer reference total R-value | 3.77m²·K/W, including the manufacturer's reference roof and ceiling materials |
| Nominal density | 11.5kg/m³ |
| Material composition | Thermally bonded recycled PET polyester fibres |
| Fire classification | B/B1/2 |
| SABS approved | No |
| Climatic zones | Zones 1 and 4, as listed in the manufacturer reference table |
| Handling | Soft, non-irritant polyester insulation without loose glass fibres |
| Applications | Ceilings, roof spaces and selected internal applications |
Insulation Applications
Where Can 145mm Isotherm Be Used?
145mm Isotherm provides a substantial polyester insulation layer for suitable ceiling and roof-space applications. The required thermal performance should be assessed for the complete building assembly.
Ceiling Insulation
Designed for insulation above suitable ceilings, helping reduce heat transfer through the roof and ceiling system.
View Insulation for Ceilings →
Roof Insulation
Flexible polyester insulation suitable for roof spaces where continuous coverage can be maintained.
View Roof Insulation →
Internal Applications
Can be considered for selected wall systems or internal spaces with sufficient cavity depth for 145mm insulation.
View Wall Insulation →Professional Installation
Installing 145mm Isotherm
Correct installation is important for retaining the polyester blanket's intended thickness and ensuring consistent thermal coverage.
Need Professional Installation?
Home Insulations supplies and professionally installs Isotherm polyester insulation in our Gauteng service areas.
Installation ServicesManufacturer Documentation
Isotherm Technical Specifications
View the original manufacturer technical specification image, including Isotherm thicknesses, thermal resistance, density and product dimensions.
Isotherm Product Specifications
Technical information supplied by the Isotherm manufacturer. Opens as an image in a new tab.
145mm Isotherm Information
Frequently Asked Questions
The manufacturer lists a product thermal resistance of R3.37m²·K/W for 145mm Isotherm.
The manufacturer reference table lists a total R-value of 3.77m²·K/W, including roof and ceiling materials. Actual installed performance depends on the building construction.
The roll supplied by Home Insulations measures 1.2m wide and 5m long.
Each 1.2m × 5m roll covers approximately 6m² before cutting allowances.
The nominal density is 11.5kg/m³.
The manufacturer table associates 145mm Isotherm with climatic zones 1 and 4. Project-specific thermal requirements should still be checked.
Isotherm manufacturer information lists the B/B1/2 fire classification.
No. The 145mm Isotherm product is not listed as SABS approved.
Need 145mm Isotherm Supplied or Installed?
Get help calculating quantities, confirming current pricing or arranging professional installation.