Insulation for More Comfortable Homes
Ceiling Insulation
Products, Prices & Professional Installation
Compare ceiling insulation products and materials in South Africa, including glasswool and polyester insulation. Explore prices and R-values, or request professional installation in Johannesburg, Centurion and Pretoria.
Compare Materials & Products
Ceiling Insulation Products in South Africa
Compare glasswool and polyester insulation materials for ceilings, including Knauf Earthwool, Aerolite Soft Touch, Fabufill and Isotherm. Explore available thicknesses, R-values, roll coverage and prices to choose a suitable product for your home or building project.
Knauf Earthwool
Glasswool rolls made with ECOSE® Technology.
Aerolite Soft Touch
Flexible glasswool for thermal and acoustic comfort.
Fabufill
Soft polyester insulation made from recycled fibres.
Isotherm
Soft polyester insulation made from recycled PET.
Explore each range for product specifications, roll coverage and current prices.
Compare All Insulation PricesLocal Supply & Installation
Ceiling Insulation in Johannesburg, Centurion & Pretoria
Home Insulations supplies glasswool and polyester insulation for ceilings and offers professional installation in Johannesburg, Centurion and Pretoria. We help homeowners compare thermal performance, roll coverage and installation requirements before choosing materials or requesting a quotation.
Johannesburg
For homes in Johannesburg, we supply glasswool and polyester insulation rolls with professional installation available for new and existing ceilings. Where material is already installed, its condition, thickness and coverage should be checked before deciding whether to retain, supplement or replace it.
Centurion
In Centurion, we offer insulation products and installation quotations for residential ceilings. Choose from different roll thicknesses and compare their declared R-values to suit your project. Ceiling area, roof construction and existing materials help determine the quantities needed and installation costs.
Pretoria
Homeowners in Pretoria can request insulation material supply or professional installation for new and existing ceilings. Before upgrading an insulated roof space, consider the current material, available access, ventilation and necessary clearances around fittings. These factors help establish the work required and an accurate quotation.
Which Materials Suit Your Ceiling?
Our range includes Knauf Earthwool and Aerolite glasswool, together with Fabufill and Isotherm polyester insulation. Compare their R-values, fire classifications and roll coverage before ordering. The appropriate product depends on your roof construction, available space and required thermal performance.
Professional Installation in Gauteng
Our insulation installation service covers residential projects in Johannesburg, Centurion and Pretoria. The work required depends on roof access, the selected insulation, existing ceiling conditions and whether preparation, cleaning or removal is necessary.
Supply & Installation Quotes
Get an Insulation Quote for Your Gauteng Property
Tell us your suburb, approximate ceiling area and whether insulation is already installed. We can help establish material quantities and provide a quotation for supply or professional installation.
Thermal Comfort Explained
How Insulation for Ceilings Works
Insulation for ceilings slows heat transfer between the living spaces below and the roof space above. In homes with an accessible roof void, insulation rolls are usually installed above the ceiling boards. This creates a thermal barrier that helps limit heat movement between the rooms and the roof space.
During winter, insulation reduces heat loss through the ceiling. In summer, it helps reduce heat entering from a hot roof space. A properly insulated ceiling can improve indoor comfort and reduce the need for heating and cooling. Windows, walls, draughts and shading also influence overall thermal performance.
Insulating a New or Existing Ceiling
Insulation can be installed during construction or added to an existing ceiling where roof access allows. For an existing home, assess the available access, the condition of any insulation already in place and whether preparation work is required.
Choosing the right material involves more than selecting a thickness. Compare its declared R-value, material, fire classification and installation requirements. The product should suit the roof and ceiling construction, with the necessary clearances and ventilation maintained.
Compare Before You Order
Compare Insulation Types & R-Values
Compare insulation for ceilings by thickness, thermal resistance and roll coverage. Knauf Earthwool and Aerolite are glasswool products, while Fabufill and Isotherm use polyester fibres. Products of the same thickness can have different R-values, and roll sizes affect the quantity needed for your project.
Knauf Earthwool
GlasswoolAerolite Soft Touch
GlasswoolFabufill
PolyesterIsotherm
PolyesterUnderstanding R-value
*R-values are expressed in m²·K/W and describe the thermal resistance of the insulation product. Higher values indicate greater resistance to heat flow. Knauf figures use the South African values in its datasheet.
Understanding Coverage
Coverage is calculated from the nominal dimensions for 1.2m-wide rolls. Other widths and pack formats may differ. Divide your ceiling area by roll coverage and round up to whole rolls.
Choose for Your Project
Thickness alone does not establish the thermal performance of a complete roof and ceiling system. Compare the selected product, roof construction and installation requirements before ordering.
Glasswool vs Polyester: Insulation for Ceilings
Glasswool and polyester are two common insulation materials for ceilings in South African homes. They differ in fibre composition, handling and fire classification, while thermal performance depends on the specific product and thickness. Compare insulation materials before choosing an option that suits your roof construction and required performance.
Glasswool Insulation
Glasswool consists of fine glass fibres formed into flexible insulation rolls. Our range for ceilings includes Knauf Earthwool and Aerolite Soft Touch, with different thicknesses, roll dimensions and declared R-values.
- Provides thermal and acoustic insulation.
- Flexible rolls fitted above ceiling boards.
- Non-combustible product options available.
Knauf Ceiling Roll has an A1 reaction-to-fire classification. Check the manufacturer's technical documentation for the specific product selected.
View Glasswool Products
Polyester Insulation
Polyester insulation is manufactured from soft synthetic fibres, including recycled PET. Fabufill and Isotherm offer different thicknesses and thermal resistance values for installation above residential ceilings.
- Soft fibres that are comfortable to handle.
- Products incorporating recycled polyester fibres.
- Various thicknesses and R-values available.
Polyester products have different fire classifications from A1 glasswool. Always compare the declared fire and thermal performance of the specific insulation product.
View Polyester ProductsWhat Thickness Do You Need?
Thickness alone does not establish the thermal performance of insulation. A product's R-value indicates its resistance to heat flow, with higher values providing greater thermal resistance.
Compare the declared R-values of the actual products rather than assuming equal thickness means equal performance. The appropriate insulation also depends on the local climate, roof construction and the performance required.
Already Have Insulation Installed?
Assess the existing insulation before deciding whether to retain, supplement or replace it. Check its condition, coverage and thickness, and address any roof leaks or other defects. If the material is damp, read how moisture affects insulation.
Tell us what material is currently installed and provide photographs where possible. This helps determine whether preparation, cleaning or removal should be included in your installation quotation.
Insulating an Existing Ceiling?
Installing insulation above an existing ceiling requires suitable roof access and consideration of any material already in place. Ceiling construction, existing coverage and the condition of the insulation help determine whether preparation, cleaning or removal is needed before fitting new rolls.
How Your Installation Works
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Tell us about your project
Share your suburb, ceiling area and photographs of the existing insulation where possible.
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Confirm the work required
Select a suitable product and establish whether preparation or removal is required.
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Arrange your installation
Confirm the quotation and schedule the installation work.
Plan Your Insulation Project
Insulation Costs & Roll Coverage
What Does Your Project Cost?
Supply Only
Use the product price and roll coverage to estimate material costs for insulating your ceiling. Allow for cutting waste, minimum order quantities and delivery.
Supply & Installation
Installation costs depend on roof access, ceiling area, the selected material and any preparation or removal work required. Request a quotation for your property.
Before You Order
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Measure the Ceiling Area
Add together the areas you want to insulate. Measure at ceiling level rather than using the sloping roof area, and identify rooms where insulation is already installed.
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Choose the Required Performance
Compare declared R-values, material types and thicknesses. Products of equal thickness can have different thermal resistance. Consider the available roof space and any existing insulation.
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Confirm Quantities and Access
Use the calculator to estimate whole rolls, then confirm cutting waste, order quantities and delivery. For installation, provide details about roof access and any preparation work.
Estimate Your Material Cost
Loading current product prices.
Whole rolls only. Cutting waste, delivery and installation are excluded. Minimum order quantities may apply.
Need Ceiling Insulation Supplied or Installed?
Tell us your ceiling area and location. We can help you choose a product and quote for supply or professional installation.