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Isotherm 135mm Thermal Insulation is a high-performance polyester insulation designed for maximum energy efficiency and indoor comfort. Manufactured from 100% recycled PET fibres, it is soft, safe, non-itch and easy to install. The 135mm thickness delivers top-tier thermal performance, reduces electricity costs, and improves both temperature and sound regulation.


Key Features

  • 135mm thick premium insulation

  • 6m² coverage per roll

  • Excellent thermal efficiency (high R-value)

  • Made from 100% recycled PET bottles

  • Non-itch, non-allergenic, safe to handle

  • Moisture-resistant & mould-resistant

  • Fire-rated (B/B1/2 – low flame spread)

  • Lightweight, durable and long-lasting

  • Ideal for ceilings and energy-efficient builds


Applications

  • Ceiling insulation

  • Internal acoustic insulation

  • Between-floor insulation

  • Residential and commercial construction


Mini Data Sheet

Specification Value
Thickness 135mm
Roll Size 1.2m x 5m
Coverage 6m² per roll
Material Thermally bonded polyester
Density ±10–12 kg/m³ (approx.)
R-Value ±3.38
Moisture Absorption ≤2%
Fire Rating B/B1/2 (Low flame spread)
Weight ±6–7kg per roll
Composition 100% recycled PET fibre

Benefits

  • Superior thermal and acoustic performance

  • Reduces heating and cooling costs

  • Eco-friendly and fully recyclable

  • Soft, safe and easy to install

  • Long-lasting and maintains loft


Why Choose the 135mm x 1.2m x 5m Roll?

Perfect for smaller areas requiring top-grade insulation, contractors needing compact rolls, or homes upgrading to SANS-compliant ceiling insulation.

Branch Availability & Bulk Supply

Isotherm Thermal Insulation 135mm x 1.2 x 5m is available for online orders, delivery or collection through Nutec Suppliers & Hardware. We supply builders, contractors, resellers and project buyers from our Cape Town/Parow, Randburg and Fordsburg Johannesburg branches.

  • Suitable for: building projects, renovations, site work, trade supply and bulk purchases.
  • Service areas: South Africa, Western Cape, Cape Town, Parow, Gauteng, Randburg, Fordsburg and Johannesburg.
  • Buying options: branch collection, delivery where available, and bulk order support for contractors and resellers.

Quick Answers

Can I buy this product in bulk? Yes, bulk enquiries are welcome for contractors, developers, hardware stores and resellers.

Can I collect from a branch? Yes, collection may be arranged from Cape Town/Parow, Randburg or Fordsburg depending on stock confirmation.

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