Polyester Insulation – Eco‑Friendly Thermal Solutions

Polyester insulation (also known as PET or synthetic fiber insulation) is a sustainable, non-itch alternative to traditional glasswool insulation materials, ideal for homeowners and builders. Made from recycled plastic (like PET bottles), it offers reliable warmth, and moisture resistance — while being soft to touch and easy to install.

At Home Insulations, we offer leading brands like Isotherm and Fabufill, delivering premium quality polyester insulation across Johannesburg, Pretoria, Cape Town, and Durban.

What Is Polyester Insulation?

Polyester insulation is a modern, eco-friendly ceiling insulation product made primarily from recycled plastic bottles (PET). Its soft, non-itch synthetic fibers make it safe for installers and occupants, while delivering reliable year-round temperature control inside homes and commercial buildings.

Unlike glasswool or mineral wool, it contains no glass fibers making it non-itch and ideal for allergy-sensitive environments, children’s rooms, and health-conscious homeowners.

How Polyester Insulation Works

It works by trapping millions of tiny air pockets within its dense fiber matrix, slowing heat transfer and maintaining stable indoor temperatures. While its primary function is thermal performance, polyester also provides moderate sound absorption, though denser materials like glasswool (e.g., 135mm Knauf or 135mm Aerolite) offer superior noise control.

Where Polyester Insulation Excels:

• Ceilings (primary application in South Africa)
• Interior walls and partitions
• Office ceilings & partitions
• Non-toxic environments
• DIY installations (due to its soft, skin-friendly nature)

Polyester insulation has become one of South Africa’s fastest growing roof insulation materials thanks to its thermal efficiency, user safety, and environmental sustainability. Whether for ceilings, walls, or retrofit upgrades, it remains a smart insulation choice.

Why Choose Polyester Insulation?

Safe & Skin-Friendly – Soft synthetic fibers that are non-irritating and gentle on installers and occupants 
Thermal Efficiency – Keeps interiors cooler in summer and warmer in winter
Moisture Tolerant – Resistant to mold, mildew, and water damage 
Durable Structure – Holds its shape over time without sagging or settling 
Environmental Impact – Made from up to 100% recycled PET, recyclable at end of life 
Low VOC Emissions – Free from formaldehyde and harmful chemicals
Multiple Thickness Options – Available from 40 mm to 145 mm, suitable for a range of applications
Ideal for PHYSICAL COMFORT – Skin-friendly, making it a great choice for interior spaces

Our Polyester Brands

Fabufill Insulation (SABS Approved)

Highly regarded for its thermal benefits, Fabufill offers insulation in popular thicknesses from 40 mm to 145 mm, suited for ceilings and walls.

Read more on Knauf vs Fabufill

Isotherm Insulation (Not SABS Approved)

Made from 100% recycled PET, Isotherm is available in thicknesses up to 145 mm. Suitable for walls, ceilings, and floors, it delivers comfort and energy efficiency across applications

Read more on Knauf vs Isotherm

Where to Use Polyester Insulation

Ideal for:

• Ceiling joists and roof spaces
• Internal walls and partitions
• Between floors for noise control
• Office and commercial applications

Polyester insulation is perfect for environments where user comfort, moisture resistance, and eco-conscious construction matter most.

Order Polyester Insulation in South Africa

Looking for premium polyester insulation? Whether you’re renovating or building new, our expert team can guide you to the right thickness and product. Shop online or request a free quote for fast delivery and professional installation.

Related Insulation Pages

• Insulation – A full breakdown of insulation types and uses.
• Materials – Explore insulation by material type.
• Applications – See which insulation suits each area of your home.
• Guides – Expert tips for installation, care, and choosing materials.
• Comparisons – Compare insulation products and materials side by side.