Sisalation Foils Insulation for Roofs

Heat does not only move through ceilings.
It also radiates.

And in South Africa’s climate, radiant heat from the roof is one of the biggest contributors to indoor discomfort.

That’s where Sisalation and foil insulation systems come in.

Unlike bulk insulation (like glass wool or polyester), foil insulation reflects radiant heat away from the building before it transfers into the roof space.

Used correctly, foil systems:

• Reduce roof heat gain
• Improve overall insulation performance
• Protect against condensation
• Provide dust and water barrier protection
• Increase fire safety (FR ranges)

We supply a full range of fire-retardant and industrial-grade Sisalation foils, including:

• Sisalation 430FR
• Sisalation 405FR
• Radenshield Industrial
• Radenshield Ecosential
• Radenshield Single Sided
• Alububble Double Sided
• Alububble White
• Alububble Black
• Alubright Double-Sided Foil
• Alulite Domestic Foil

Whether you’re building a home, warehouse, factory or agricultural structure, this category covers every foil insulation requirement.

What Is Sisalation Foil Insulation?

It works by reflecting radiant heat away from the building.

During summer:
→ Reflects heat outward
→ Keeps roof space cooler

During winter:
→ Reflects internal warmth into the building

It also acts as:

• Vapour barrier
• Condensation control layer
• Dust barrier
• Secondary waterproofing layer

Foil insulation does not replace bulk insulation — it enhances it.

The best performance comes from combining:

Foil + Ceiling Insulation

Sisalation 430FR – High Performance Fire Retardant

Sisalation 430FR is one of the most widely specified radiant barriers in South Africa.

Designed for:

• Residential roofing
• Commercial buildings
• Fire-sensitive projects

Key features

• Fire retardant rating (FR)
• Strong woven reinforcement
• High tensile strength
• Reflective aluminium surface
• Vapour barrier performance
• Long lifespan

Why 430FR is popular

It balances strength, performance and affordability.

It is suitable for:
• Tile roofs
• Metal sheet roofs
• Timber trusses
• Residential developments

For most standard homes, 430FR is the ideal solution.

Sisalation 405FR – Reliable & Cost Effective

Sisalation 405 FR is slightly lighter than 430FR but still offers strong fire-retardant performance.

Benefits

• FR rated
• Cost-effective
• Easy installation
• Durable reinforcement
• Reflective radiant barrier

Ideal for:
• Standard housing
• Developments
• Renovations
• Budget-controlled projects

If 430FR is premium residential, 405FR is practical everyday residential.

Radenshield Industrial Sisalation

Industrial buildings experience extreme heat build-up.

Radenshield Industrial is designed specifically for:

• Factories
• Warehouses
• Workshops
• Distribution centres

Why industrial foil matters

Metal roofs amplify heat.

Without foil:
Roof space temperatures can exceed 60°C.

With foil:
Radiant heat is reflected before entering.

Features

• Heavy-duty construction
• High tear resistance
• Large roll coverage
• Strong vapour barrier
• Long-term durability

For industrial roofing, standard domestic foil is not enough. Radenshield Industrial is built for scale.

Radenshield Ecosential Foil

Rasenshield Ecosential is a lighter, more economical radiant barrier solution.

Perfect for:
• Smaller projects
• Budget-conscious builds
• Residential upgrades

It still delivers:
• Reflective heat protection
• Moisture control
• Basic barrier protection

Radenshield Single Sided Foil

Single-sided foil is typically used in:

• Wall insulation
• Agricultural buildings
• Specific roof applications
• Retrofit projects

It reflects heat from one direction and is often combined with other insulation layers.

Alububble Double Sided Sisalation

Alububble Double Sided combines:

• Air bubble core
• Double reflective aluminium surfaces

The bubble layer adds slight thermal resistance while the foil reflects radiant heat.

Benefits

• Lightweight
• Easy handling
• Moisture resistant
• Dual reflective surface
• Cost-effective

Ideal for:
• Garages
• Carports
• Steel structures
• Agricultural buildings

Alububble White & Black Sisalation

These variations provide aesthetic and application flexibility.

White:
• Cleaner internal appearance
• Reflective surface

Black:
• Reduces glare
• Industrial look
• Hides roof structure visually

Functionally similar, visually different.

Alubright Double-Sided Foil

Alubright is a durable reflective foil membrane offering:

• High reflectivity
• Moisture barrier
• Long-term durability

Suitable for:
• Residential roofs
• Light commercial
• Renovations

Alulite Domestic Foil

Alulite is an entry-level domestic radiant barrier.

Best suited for:
• Small homes
• Budget builds
• Basic heat control

While lighter than industrial options, it still provides meaningful heat reflection.

Benefits of Sisalation & Radiant Barrier Foils

1. Reduces roof heat gain

Reflects up to 95% of radiant heat.

2. Improves insulation efficiency

Works best combined with bulk insulation.

3. Controls condensation

Acts as a vapour barrier.

4. Fire retardant protection

FR ranges enhance safety.

5. Dust barrier

Prevents dust from entering the roof cavity.

6. Lightweight & fast to install

Extensive coverage per roll.

7. Long lifespan

Does not sag or settle like bulk insulation.

Foil vs Bulk Insulation – What’s the Difference?

Foil:
Reflects radiant heat.

Bulk insulation:
Slows conductive heat transfer.

Best practice:
Use both.

Foil under the roof sheets.
Bulk insulation on the ceiling.

That combination delivers maximum performance.

Where Sisalation Is Used

• Residential homes
• Warehouses
• Factories
• Shopping centres
• Schools
• Agricultural buildings
• Steel structures
• Carports
• Workshops

Anywhere metal roofing is exposed to direct sunlight.

FAQ’S

What is Sisalation?

A reflective foil membrane is used under roofing to reflect radiant heat.

Does foil insulation really work?

Yes, especially in hot climates with metal roofing.

What is FR?

Fire Retardant – slows flame spread.

Is 430FR better than 405FR?

430FR is stronger and slightly more durable.

Can foil replace ceiling insulation?

No. It should be combined with bulk insulation.

Does foil reduce condensation?

Yes. Acts as a vapour barrier.

How long does Sisalation last?

20+ years when installed properly.

Can foil be installed on existing roofs?

Possible, but easier during new roof installation.

Which foil is best for factories?

Radenshield Industrial.

Which foil is best for homes?

430FR or 405FR.