Sisalation Insulation – Reflective Foil – Vapor Barrier

Sisalation is one of South Africa’s most trusted radiant barrier insulation products, commonly installed beneath metal and tiled roofs to combat radiant heat and moisture build-up. Engineered for durability and high reflectivity, Sisalation helps regulate indoor temperatures by reflecting up to 95% of radiant heat — reducing cooling costs and enhancing comfort in all seasons.

Unlike bulk insulation such as fiberglass or polyester, which slow down heat transfer by conduction, Sisalation acts as a radiant barrier and vapor shield, offering additional protection against condensation and thermal buildup in your roofing system. When paired with traditional ceiling insulation materials like Aerolite, Knauf, Isotherm, or Fabufill, it forms a powerful hybrid solution for superior thermal performance.

At Home Insulations, we supply a full range of reflective foil insulation products at competitive pricing. Whether you’re comparing prices or planning a full retrofit for energy efficiency, Sisalation offers lasting value, improved roof performance, and peace of mind across across Johannesburg, Centurion, Pretoria, Cape Town, and Durban.

Estimate your project with our insulation price list

Benefits of Sisalation Insulation

✅ Reflects up to 95% of radiant heat – keeps interiors cooler in summer
✅ Vapor Barrier – helps prevent condensation and roof moisture buildup
✅ Durable Construction – tear-resistant laminate reinforced for longevity
✅ Energy Efficiency – supports thermal regulation and lower utility bills
✅ Versatile Use – ideal under metal sheeting or tiled roofing systems
✅ Fire Performance – SANS compliant with rated fire safety classifications

Where Can Sisalation Be Installed?

• Residential homes
• Commercial and industrial roofs
• Warehouses and factories
• Workshops and garages
• Under metal or tiled roof sheeting
• Ceiling retrofits and new builds

Sisalation is ideal for both new constructions and retrofit applications where reflective insulation is required.

Sisalation GR405 Reflective Foil Insulation

Sisalation GR405 is a premium residential-grade reflective foil insulation for roofs designed to protect homes from radiant heat and condensation. Each roll measures 1.25 m x 40 m and weighs approximately 160 g/m², making it lightweight and easy to install. The laminate consists of double-sided aluminium foil reinforced with kraft paper and a scrim layer, ensuring superior durability and long-term thermal performance.

Product Specifications

• Brand: Sisalation
• Type: GR405 (Residential Grade)
• Material: Double-sided reflective foil with kraft paper + reinforcing scrim
• Roll Size: 1.25 m × 40 m
• Coverage: 50 m² (effective 44 m² with 150 mm overlap)
• R‑Value: 1.38 (m²·K)/W for downward heat flow (with ≥ 15 mm airspace)
• Fire Rating: B/B1/2/H – SANS 428 compliant
• Mass & Thickness: Approx. 160 g/m² • 240 µm nominal thickness

Key Benefits

✅ Effective reflective barrier – blocks radiant heat
✅ Vapor barrier – helps reduce roof condensation
✅ Dust-resistant – promotes better indoor air quality
✅ Lightweight and easy to install – long-lasting performance

In addition to its moisture-blocking properties and heat reflectivity, Sisalation GR405 complies with SANS 10400-XA building regulations and offers an R-value of 1.38 (m²·K)/W when installed with a 15 mm air gap. It is rated B/B1/2/H for fire safety under SANS 428, making it a trusted and compliant choice for ceiling and roof applications in homes throughout South Africa.

Sisalation FR405 Light Industrial Reflective Foil Insulation

Sisalation FR405 is a light industrial-grade reflective foil insulation for ceilings designed for enhanced durability and thermal performance in factories, warehouses, and light commercial buildings. Each roll is 1.25 m x 40 m in size and made with double-sided aluminium foil, laminated to reinforced kraft and scrim layers for strength and resilience. With a higher mass of 180 g/m², this product is engineered for environments where added toughness is essential.

Product Specifications:

• Product Name: Sisalation FR405
• Roll Size: 1.25 m x 40 m
• Total Coverage: 50 m²
• Effective Coverage: 44 m² (allowing for overlaps)
• Material Composition: Double-sided aluminium foil + reinforced kraft + scrim
• Mass: ±180 g/m²
• Thickness: Nominal 240 µm
• Water Vapor Transmission Rate: Low – functions as a vapor barrier
• R-Value (with 15 mm air gap): 1.38 (m²·K)/W
• Fire Rating: B/B1/2/H – SANS 428
• Building Compliance: SANS 10400-XA

Key Benefits

✅ Reflects radiant heat – enhances thermal efficiency in industrial spaces
✅ Moisture barrier – reduces risk of condensation damage
✅ Tough and tear-resistant – ideal for light commercial use
✅ Easy to handle and install – suitable for various roof structures

In addition to its reflective insulation capabilities, Sisalation FR405 offers an R-value of 1.38 (m²·K)/W when installed with a 15 mm air gap. It complies with SANS 10400-XA for energy efficiency and carries a fire rating of B/B1/2/H in accordance with SANS 428. This makes FR405 a robust and dependable choice for light industrial applications across South Africa.

Sisalation FR430 Heavy Industrial Reflective Foil Insulation

Sisalation FR430 is engineered for high-demand environments like factories, warehouses, and large-scale agricultural or commercial buildings. Each roll measures 1.25 m x 40 m, offering 50 m² total coverage (with 44 m² effective coverage after overlaps). It features a robust laminate made from double-sided aluminium foil bonded to reinforced kraft paper and scrim, delivering a nominal thickness of 260 µm and a weight of approximately 240 g/m² for superior durability and thermal performance in industrial applications.

Product Specifications

• Product Name: Sisalation FR430 Heavy Industrial
• Roll Size: 1.25 m x 40 m
• Total Coverage: 50 m²
• Effective Coverage: 44 m² (allowing for overlaps)
• Material Composition: Double-sided aluminium foil + reinforced kraft + scrim
• Mass: ±240 g/m²
• Thickness: Nominal 260 µm
• Water Vapour Transmission Rate: Low (vapour barrier)
• Fire Rating: B/B1/2/H – SANS 428
• R-Value: 1.38 (m²·K)/W (with 15 mm air gap)

Key Benefits

✅ Heavy-duty construction – ideal for industrial roof spaces
✅ Blocks radiant heat – enhances internal temperature control
✅ Vapour barrier – helps prevent condensation and moisture damage
✅ Tear-resistant – reinforced for long-term performance

Sisalation FR430 meets the stringent SANS 10400-XA energy regulations and carries a fire rating of B/B1/2/H, making it a trusted choice for South African industrial buildings where heat reflection, fire resistance, and moisture control are critical.

Sisalation Fireshield NC 502 D/S (210 g/m²) Reflective Foil Insulation

Sisalation Fireshield NC 502 D/S (210 g/m²) is a double-sided reflective foil insulation developed for non-combustible applications where fire performance and thermal efficiency are essential. Each roll measures 1.25 m x 40 m, offering a total coverage of 50 m², with an effective coverage of 44 m² after accounting for overlaps. The product consists of double-sided aluminium foil bonded to a non-combustible reinforced glass fabric, delivering excellent strength, a mass of ±210 g/m², and a nominal thickness of 270 µm. It’s designed for buildings that require compliance with stringent fire safety standards.

Product Specifications

• Product Name: Sisalation Fireshield NC 502 D/S (210 g/m²)
• Roll Size: 1.25 m x 40 m
• Total Coverage: 50 m²
• Effective Coverage: 44 m² (allowing for overlaps)
• Material Composition: Double-sided aluminium foil + non-combustible glass fabric
• Mass: ±210 g/m²
• Thickness: Nominal 270 µm
• Water Vapour Transmission Rate: Low (vapour barrier)
• Fire Rating: B/B1/2/H – SANS 428
• R-Value: 1.38 (m²·K)/W (with 15 mm air gap)

Key Benefits

✅ Non-combustible glass core – superior fire resistance
✅ Dual-sided foil – reflects radiant heat from both directions
✅ Moisture barrier – reduces condensation buildup
✅ High strength – reinforced for demanding environments

Sisalation Fireshield NC 502 D/S is a high-performance insulation solution ideal for commercial or industrial buildings where fire rating, thermal control, and moisture protection are top priorities. Fully compliant with SANS 10400-XA and SANS 428, it provides dependable protection and lasting performance.

How Sisalation Works as a Radiant Barrier

Sisalation works by reflecting radiant heat away from the building envelope, significantly reducing heat transfer through the roof or walls. Its reflective aluminum foil surface bounces up to 95% of radiant heat, preventing it from penetrating the interior. This keeps homes cooler in summer and warmer in winter, reducing energy costs year-round.

The closed vapor barrier layer also controls moisture, preventing condensation buildup, mold growth, and structural damage. Unlike bulk insulation, Sisalation addresses both heat radiation and moisture simultaneously.

Sisalation vs Alububble vs Radenshield vs Scrim Foil — Radiant Barrier Comparison

Here’s a complete side-by-side comparison of South Africa’s leading radiant barrier insulation products:

Choosing the Right Sisalation Product

Sisalation is available in several variants to suit different building types and safety requirements:

Our experts can help you select the ideal variant depending on your building code requirements, budget, and project specifications.

Installation Tips for Sisalation

• Sisalation should be installed with the reflective foil side facing the heat source (usually downwards for roofs).

• Ensure sheets overlap correctly, typically 100–150mm.

• Seal overlaps with Sisalation-approved foil tape for maximum vapor barrier performance.

• Secure firmly to prevent wind uplift prior to sheeting installation.

• Installation should comply with SANS 10400-XA and local building codes.

Always consult professional installers for correct installation procedures.

Sisalation Pricing Factors

Sisalation pricing depends on several factors:

• Chosen product variant (GR, FR, or NC models)

• Roll size (standard 40m x 1350mm or custom sizes)

• Quantity required for project size

• Fire rating and compliance level

• Installation labor costs

For the most accurate Sisalation price quote, contact Home Insulations for a tailored quotation based on your specific project needs.

Certifications & Compliance

• ✅ SANS 428 (Fire Rating: B/B1/2/H)

• ✅ SANS 10400-XA (Energy Efficiency Compliance)

• ✅ Recognized by TIPSASA

Insulating your ceilings and roofs is just the start. Adding wall insulation and floor insulation helps stop heat loss throughout your entire home, lowering electricity bills and keeping every room comfortable year-round.

Why Choose Home Insulations?

We’ve supplied thousands of square meters of Sisalation across South Africa. Here’s why homeowners and contractors trust us:

✅ Over 30 years of ceiling insulation experience
✅ Friendly, trained installers
✅ Prompt delivery and professional installation
✅ Branches in Johannesburg, Centurion, Pretoria, Cape Town & Durban
✅ We only use genuine Sisalation (no imitation products)

Frequently Asked Questions