Ceiling & Roof Insulation Price List South Africa (2025)

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2. Sisalation Roof Insulation Prices

Sisalation is one of South Africa’s most widely used roofing insulation materials, designed to reflect radiant heat away from the roof cavity. It is installed under metal or tiled roofs to improve thermal performance, reduce heat gain and support a fully insulated roof system. Sisalation is ideal for residential and commercial buildings across Johannesburg, Centurion, and Pretoria where insulation for roofs is essential for comfort and energy efficiency.

Variant	Roll Price	Coverage	Roll Price/m²	R-value	Mass (g/m²)
Sisalation GR405	R1,480	44m²	R34/m²	1.38	160 g/m²
Sisalation FR405	R1,825	44m²	R42/m²	1.43	185 g/m²
Sisalation FR430	R2,420	44m²	R55/m²	1.47	256 g/m²
Sisalation Fireshield	R2,599	44m²	R60/m²	1.38	210 g/m²

Sisalation enhances the performance of bulk roof insulation products like Aerolite or Knauf, creating a complete system that blocks both radiant and conductive heat. This makes it perfect for insulating roofs in hot climates and helps maintain stable indoor temperatures throughout the year.

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3. RadenShield Roof Insulation Prices

RadenShield is a premium aluminium roof insulation membrane designed to block radiant heat and protect the roof cavity from moisture, dust, and wind intrusion. It is widely used in South African homes, warehouses, factories, and commercial buildings where durable roofing insulation materials are required for stable indoor comfort.

Variant	Roll Price	Coverage	Roll Price/m²	R-value	Mass (g/m²)
RadenShield Single-Sided	R899	40.5m²	R22/m²	1.05	126g/m²
RadenShield Double-Sided	R1,348	40.5m²	R33/m²	1.59	172g/m²
RadenShield Ecosential	R1,056	40.5m²	R26/m²	1.52	134g/m²
RadenShield Industrial	R2,025	45m²	R45/m²	1.57	220g/m²

Installed beneath metal sheeting or tiled roofs, RadenShield improves thermal performance, reduces heat gain, and forms part of a complete insulated roof system when combined with bulk insulation such as Aerolite, Knauf, or Factorylite. It is popular across Johannesburg, Centurion, and Pretoria for both residential and industrial insulation for roofs.

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4. Alububble Roof Insulation Prices

Alububble is a high-performance reflective foil insulation used as roof insulation under metal or tiled roofs. Available in both white and black finishes (with identical specifications), it is ideal for creating an insulated roof system in residential, commercial, or industrial buildings across Johannesburg, Centurion, and Pretoria. The product helps reduce radiant heat gain, improves the performance of bulk insulation, and contributes to cooler, more comfortable indoor areas.

Variant	Roll Price	Coverage	Roll Price/m²	R-value	Mass (g/m²)
Alububble White	R1,899	46m²	R42/m²	1.38	270 g/m²
Alububble Black	R1,920	46m²	R42/m²	1.38	270 g/m²

Alububble is a reliable reflective foil used for roof insulation. It reduces radiant heat entering the roof cavity, improves the effectiveness of bulk insulation, and helps maintain stable indoor temperatures throughout the year. With identical performance in both white and black finishes, Alububble offers a lightweight, durable, and cost-effective solution for insulating roofs in South African homes and buildings.

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Ceiling Insulation vs Roof Insulation

Ceiling insulation is installed directly on top of the ceiling board, blocking heat transfer between the roof cavity and your living space. It keeps homes cooler in summer, warmer in winter, and reduces electricity use by improving overall energy efficiency. This is the most common insulation method for houses in Johannesburg, Centurion, and Pretoria.

Roof insulation, on the other hand, is installed at the roof level — either beneath or above the roof sheeting. It stops radiant heat before it enters the roof cavity, making it essential for metal roofs, warehouses, factories, commercial buildings, and hot roof structures.

In summary:

• Ceiling insulation: Best for homes, retrofits, temperature control, and energy savings
• Roof insulation: Best for metal roofs, industrial buildings, flat roofs, and high-heat environments
• Both together: Maximum comfort, stable indoor temperatures, and the highest energy-efficiency performance

This simple comparison helps homeowners understand exactly where each product is used and why combining the two often delivers the best results.

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Ready to insulate your home, office, or building?

Home Insulations supplies and installs all major ceiling insulation and roof insulation products across Johannesburg, Centurion, and Pretoria. Whether you need help choosing the right product, calculating how much insulation your project requires, or booking a professional installation — our team is here to assist.

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FAQ: Ceiling & Roof Insulation (South Africa)

1. Which thickness of ceiling insulation do I need?
Most Johannesburg, Centurion, and Pretoria homes require 135mm insulation to meet SANS 10400-XA standards. Thinner options like 100mm or 75mm can be used for topping up existing insulation.

2. What is the difference between ceiling insulation and roof insulation?
Ceiling insulation sits on top of the ceiling board and controls heat inside the living space. Roof insulation is installed directly under the roof sheeting to block radiant heat before it enters the roof cavity.

3. How long does insulation last?
High-quality insulation like Knauf and Aerolite lasts 25–30+ years, provided it stays dry and undisturbed.

4. Can I install insulation myself?
Yes, ceiling insulation rolls can be installed DIY if you have access to the roof space. Roof insulation foil products are best installed by professionals to ensure correct overlaps, tensioning, and moisture control.

5. Does insulation reduce electricity usage?
Absolutely. Proper ceiling insulation can reduce heating and cooling costs by 20–35%, depending on your home’s size and climate zone.

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Which Insulation Product Should I Choose? (Simple Buyer Guide)

Here’s a quick breakdown to help homeowners choose the right product:

Best Overall Performance → Knauf Earthwool
Highest R-values, A1 fire rating, soft handling, best energy savings.

Best Value for Money → Aerolite Soft Touch
Affordable, high-performing ceiling insulation with SABS approval.

Softest / Non-Irritant Option → Fabufill or Isotherm
Easy to handle but lower R-values, acoustic performance, fire ratings, and cost more.

Best for Factories / Metal Roofs → Factorylite
Excellent for warehouses, workshops, and commercial buildings.

Best Radiant Heat Control → Sisalation, RadenShield, Alububble
Stops radiant heat before it enters the roof cavity. Works well with Knauf or Aerolite.

If you want maximum comfort and lowest electricity bills, the best solution is:
Ceiling insulation + Roof insulation foil together

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How to Calculate How Many Rolls You Need

Here’s a simple method homeowners can follow:

Step 1: Measure the ceiling area

Measure the length × width of each room, or use your house plan.
Example:
5m × 4m = 20m²

Add all rooms together for the total.
Example:
20m² + 15m² + 12m² + 25m² = 72m² total area

Always add 10% for overlaps and offcuts.
72m² × 1.10 = 79.2m²

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Step 2: Check the coverage per roll

Use the coverage values from your tables:

• Knauf 135mm → 9m² per roll

• Aerolite 135mm → 6m² per roll

• Fabufill 100mm → 7.2m² per roll

• Factorylite → 12m² per roll

• Sisalation GR405 → 44m² per roll

• etc.

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Step 3: Divide total area by roll coverage

Example for Knauf 135mm:
79.2m² ÷ 9m² = 8.8 rolls → order 9 rolls

Example for Aerolite 135mm:
79.2m² ÷ 6m² = 13.2 rolls → order 14 rolls

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Step 4: If you have a pitched roof

Multiply by 1.15 instead of 1.10 to account for slope.
79.2m² × 1.15 = 91.1m²

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Need help?

We calculate rolls for homeowners daily — simply send your house size, and we’ll do it for you.