What Is Isotherm Insulation?

Isotherm Insulation is a premium polyester fibre insulation product developed specifically for the South African market. Manufactured from thermally bonded polyester fibres, Isotherm provides excellent thermal and acoustic performance while offering a soft, non-irritating alternative to traditional insulation materials.

Designed to reduce heat transfer through roof structures, Isotherm helps maintain comfortable indoor temperatures throughout the year. During summer it reduces excessive heat entering the building, while during winter it assists in retaining warmth inside occupied spaces.

Its combination of thermal efficiency, ease of handling and long-term durability has made Isotherm one of South Africa’s most recognised ceiling insulation products.

Why Choose Isotherm Insulation?

Excellent Thermal Performance

One of the primary reasons homeowners and businesses install Isotherm is its ability to reduce heat transfer through the roof.

Benefits include:

• Cooler homes during summer
• Improved warmth during winter
• Reduced temperature fluctuations
• Lower energy consumption
• Improved indoor comfort

Proper roof insulation can significantly improve the overall performance of a building while helping reduce heating and cooling costs.

Soft and Easy to Handle

Unlike some traditional ceiling insulation products, Isotherm is manufactured from polyester fibres that are soft and pleasant to work with.

Benefits include:

• Non-itch material
• Easy installation
• No protective clothing required
• No sharp fibres
• Comfortable handling

These characteristics make Isotherm a popular choice for both professional installers and DIY homeowners.

Improved Acoustic Performance

Isotherm provides excellent sound absorption properties which help reduce unwanted noise entering a building.

Benefits include reducing:

• Rain noise
• Traffic noise
• Aircraft noise
• External environmental sounds

Improved acoustic comfort contributes to a quieter and more enjoyable indoor environment.

Long Service Life

Isotherm insulation is designed to provide reliable thermal performance for many years.

The product is:

• Durable
• Moisture resistant
• Resistant to sagging
• Resistant to settlement

When correctly installed, Isotherm can continue performing effectively throughout the life of the building.

Environmentally Friendly

Isotherm is manufactured using recycled polyester fibres and is considered an environmentally responsible insulation solution.

Benefits include:

• Recycled content
• Reduced environmental impact
• Long product lifespan
• Sustainable manufacturing principles

Isotherm Insulation Thickness Options

50mm Isotherm Insulation

50mm Isotherm provides an entry-level insulation solution where moderate thermal improvement is required.

Suitable for:

• Homes
• Garages
• Workshops
• Offices

Benefits include improved comfort and reduced roof heat gain.

75mm Isotherm Insulation

75mm Isotherm provides enhanced thermal performance while maintaining excellent value.

Applications include:

• Residential homes
• Offices
• Schools
• Light commercial buildings

 

100mm Isotherm Insulation

100mm Isotherm is one of the most popular options for homeowners seeking effective year-round thermal protection.

Benefits include:

• Improved thermal resistance
• Better acoustic absorption
• Reduced energy costs
• Increased indoor comfort

 

 

135mm Isotherm Insulation

135mm Isotherm provides excellent thermal performance and is frequently specified for residential and commercial projects requiring improved energy efficiency.

Suitable for:

• New homes
• Renovations
• Offices
• Commercial buildings

 

145mm Isotherm Insulation

145mm Isotherm delivers the highest thermal performance within the Isotherm ceiling insulation range. Is an ideal insulation for thermal ceilings.

Benefits include:

• Maximum thermal efficiency
• Excellent acoustic performance
• Reduced heating and cooling requirements
• Superior year-round comfort

This option is often selected for energy-conscious homeowners and high-performance building projects.

Residential Applications

Isotherm ceiling insulation is widely used in homes throughout South Africa.

Benefits for homeowners include:

• Reduced electricity consumption
• Improved indoor comfort
• Better temperature control
• Quieter living environments
• Long-term value

Many homeowners consider Isotherm one of the most comfortable insulation products available due to its soft polyester construction.

Commercial Applications

Commercial properties can benefit significantly from effective ceiling insulation.

Isotherm is commonly installed in:

• Offices
• Schools
• Churches
• Retail stores
• Medical facilities
• Community buildings

The combination of thermal and limited acoustic performance helps create more comfortable working environments.

Isotherm and Energy Efficiency

As electricity prices continue to rise, improving building efficiency has become increasingly important.

Isotherm helps:

• Reduce heat transfer
• Improve HVAC efficiency
• Lower energy costs
• Improve building performance

The result is improved comfort and reduced operating expenses throughout the year.

Isotherm and Acoustic Comfort

In addition to thermal performance, Isotherm provides medium acoustic benefits.

Its sound-absorbing properties help reduce:

• Roof noise
• Rain noise
• External traffic noise
• General environmental sound

This makes Isotherm particularly attractive for residential and office applications.

Isotherm Insulation and Sisalation Foils

For maximum roof performance, Isotherm is often installed together with reflective foil insulation products.

Combining Isotherm with:

• Alubrite Foils
• Alububble Foils
• Radenshield Foils

helps address both radiant and conductive heat transfer.

This creates a highly effective roof insulation system suitable for South African conditions.

Isotherm Insulation and Roof Ventilation

Roof ventilation systems can further improve building comfort by removing trapped hot air from roof spaces.

Combining Isotherm with:

• Whirlybird Ventilators
• Turbine Ventilators
• Roof Ventilation Systems

helps create a more efficient and comfortable roof environment.

Why Buy Isotherm Insulation From INSUL8SA?

INSUL8SA supplies genuine Isotherm insulation products suitable for residential, commercial and industrial applications throughout South Africa.

We offer:

• Competitive pricing
• Expert advice
• Nationwide delivery
• Multiple thickness options
• Reliable customer service

Whether you are building a new home or upgrading an existing roof, our team can help you select the right Isotherm insulation solution. If you need a profesional insulation Installer at the best installed price call Cape Ceilings & drywalling

---

Frequently Asked Questions

What is Isotherm insulation made from?

Isotherm is manufactured from thermally bonded polyester fibres, including recycled polyester materials.

Does Isotherm itch?

No. One of the advantages of Isotherm is that it is soft and non-irritating to handle.

Is Isotherm suitable for South African conditions?

Yes. Isotherm was specifically developed for South African climatic conditions.

Does Isotherm reduce electricity costs?

Yes. By reducing heat transfer through the roof, Isotherm can help lower heating and cooling energy requirements.

Which Isotherm thickness should I choose?

The ideal thickness depends on your insulation requirements and budget. 135mm and 145mm options generally provide the highest thermal performance.

---

Product Variations