Useful for top-up work
A relatively slim roll may suit a carefully planned additional layer over suitable existing material. Examine the old insulation first and keep ventilation and service clearances in mind.
ECO FRIENDLY HOMES / AEROLITE SOFT TOUCH
50mm Aerolite Insulation
Refresh an existing ceiling.
Make every roll count.
50mm Aerolite Insulation is a lightweight glasswool blanket particularly useful for suitable ceiling-insulation top-ups and refurbishment projects. Each 10 m × 1.2 m roll covers a nominal 12 m² with a declared material R-value of 1.14 m²·K/W. Check your existing ceiling specification, calculate the rolls and ask us for a current quotation.
Simple roll planning · No checkout payment · Product-specific quote
ISOVERSOFT TOUCH
12 m²Nominal coverage per roll
1.14Material R-value · m²·K/W
10 × 1.2 mRoll dimensions
A1Non-combustible glasswool
SMARTER CEILING IMPROVEMENTS
When does 50mm Aerolite Insulation make sense?
Many older homes already have some ceiling insulation, but the coverage may be patchy or the original layer may be thinner than the desired specification. Where the existing material is suitable to retain, 50mm Aerolite Insulation can be considered as an additional blanket. A site inspection should establish whether topping up, replacing damaged material or choosing a different thickness is the correct solution.
Do not treat this 50 mm roll as a universal new-build specification. Isover identifies it as a possible top-up option for homes with insulation that falls short of the requirements for new buildings. Your roof construction, energy zone and existing assembly determine what thermal performance is appropriate.
12 m² per roll
The longer 10 m blanket provides generous nominal area coverage. Enter your measured ceiling area in the live calculator to estimate whole rolls before you request a quote.
Passive heat resistance
50mm Aerolite Insulation reduces heat transfer through the blanket and also absorbs some sound energy. Performance depends on installation quality and the complete ceiling system.
LIGHTWEIGHT / FLEXIBLE / PRACTICAL
A little extra thickness.
More considered comfort.
50mm Aerolite Soft Touch is made from flexible glasswool supplied in compression-packed rolls. It can be cut to suit roof timber spacing and can help improve a ceiling that has gaps or insufficient insulation, provided the overall design is suitable.
The manufacturer's guidance says the blanket recovers to full thickness after unpacking, normally within 24–48 hours. Do not squash the fibres underneath stored items, wiring or roof-space equipment; the declared thermal performance is based on the intended installed thickness.
Before fitting 50mm Soft Touch Aerolite, inspect for damp patches, pests, damaged ceiling boards and exposed electrical work. If the existing insulation is wet, contaminated or deteriorated, replacing it may be more appropriate than adding another layer.
Important for new homes: 50mm Aerolite Insulation alone should not be assumed to satisfy South African new-building energy-efficiency requirements. Confirm the relevant SANS 10400-XA specification for the project. Isover describes this thickness principally as a top-up option.
CHECK THE PRODUCT, NOT ONLY THE PACK
50mm Aerolite Insulation specifications
These figures come from Isover's published Aerolite Soft Touch product range. The R-value describes the material itself, not the measured result of a complete installed roof and ceiling. Individual packs should be checked when goods arrive.
MATERIAL THERMAL RESISTANCER-1.14 m²·K/W
The 50 mm blanket provides less resistance to heat flow than the thicker 100 mm and 135 mm rolls. Only choose 50mm Aerolite Insulation after checking your actual ceiling requirements rather than relying on pack size alone.
| Product | 50mm Aerolite Insulation |
|---|---|
| Manufacturer | Isover / Saint-Gobain |
| Nominal thickness | 50 mm |
| Roll length | 10,000 mm (10 m) |
| Roll width | 1,200 mm (1.2 m) |
| Nominal area | 12 m² per roll |
| Declared material R-value | 1.14 m²·K/W |
| Manufacturer SKU | 2345 |
| Product material | Flexible glasswool blanket |
| Fire classification | A1 under SANS 53501-1, as listed by Isover |
| Typical application | Ceiling insulation top-up / suitable retrofit |
Manufacturer specifications are subject to change. Always verify delivered packaging and project requirements.
INTERACTIVE MATERIAL PLANNER
Calculate 50mm Aerolite Insulation rolls.
Start with the ceiling area you actually need to cover, not an estimate of the roof pitch. A full roll provides 12 m² of nominal coverage before cuts or site waste. Select 0%, 5% or 10% for cutting allowance, and the calculator rounds up to complete rolls.
Example: for 120 m², 50mm Aerolite Insulation needs 10 whole rolls without an allowance. At 5%, the estimated requirement becomes 11 rolls, providing 132 m² of nominal material. Complicated corners, obstructions or a non-standard layout may change actual quantities.
For 50mm Aerolite Insulation, send your calculated result straight to the quotation form. You can still edit the number of rolls before submitting the enquiry.
11rolls estimated
132 m²
nominal roll coverage
120 m² + 5% allowance, rounded up to whole rolls.
Nominal coverage: 12 m² per roll. The result is an estimate, not a site measurement or a thermal-compliance assessment.
REAL ROLL QUANTITIES / CURRENT QUOTATIONS
50mm Aerolite Price — how to compare costs
The 50mm Aerolite Price depends on the number of rolls ordered and whether you need delivery or installation. We use a quotation rather than a potentially outdated website price, so the request can include your delivery suburb and project details.
When comparing roll prices, remember that one 50 mm roll covers 12 m², while thicker Aerolite rolls cover less area. The price per roll therefore does not tell the full story. To calculate the quoted material rate per square metre, divide the quoted 50 mm roll price by 12. VAT, transport, labour and site waste can affect your total project cost.
If you're trying to improve a poorly insulated roof space, check whether 50mm Aerolite Insulation is actually the best specification. Paying less for the wrong thickness is not a saving. Where a new ceiling needs a higher declared R-value, compare the 100 mm and 135 mm options before placing your order.
DO IT ONCE / DO IT PROPERLY
Planning a 50 mm insulation top-up
Good insulation cannot compensate for unsafe roof-space conditions. Follow the manufacturer’s instructions and use competent installers where electrical, structural or access issues are present.
- Check what is already installed.
Look for moisture damage, compression, gaps and missing coverage. A top-up should not trap existing problems underneath a fresh blanket.
- Measure the ceiling.
Record the actual area and subtract only areas that genuinely do not require coverage. Add a realistic cutting allowance rather than rounding the roof footprint at random.
- Lay the blanket correctly.
Fit 50mm Aerolite Insulation without leaving gaps or crushing its thickness. Keep roof ventilation paths open and maintain manufacturer-required clearances at downlights, electrical fittings and other heat sources.
- Inspect safely.
Never stand on ceiling boards. Use appropriate access and protective equipment, and check that no sections have been displaced during the work.
QUESTIONS THAT MATTER
50mm Aerolite Insulation FAQs
How many square metres does one roll cover?
One roll of 50mm Aerolite Insulation measures 10 m by 1.2 m, giving 12 m² of nominal coverage. The practical amount required can be higher when cutting around corners, trusses and roof-space obstructions.
What is the R-value of 50mm Aerolite Soft Touch?
Isover publishes a material R-value of 1.14 m²·K/W for the 50 mm product. This is not the R-value of an entire roof assembly and is not by itself evidence that a new home meets energy-efficiency regulations.
Can I use this thickness on its own in a new house?
Do not assume so. Isover identifies 50mm Aerolite Insulation as a possible top-up for existing homes. New construction should be specified using the applicable energy-zone and SANS 10400-XA requirements, taking the whole roof system into account.
Can it be installed over older ceiling insulation?
Often a top-up is possible when the old material is dry, sound and suitable to retain, but it must be assessed first. Do not simply cover wet, contaminated or severely compressed insulation. Confirm that the layered assembly suits the ceiling and roof-space services.
How do I compare 50mm Aerolite Price per m²?
Divide the quoted roll price by the nominal 12 m² coverage. Include VAT, delivery charges, cutting waste and any labour when comparing complete installed costs. Ask for a written breakdown if comparing two quotations.
Can I order by roll quantity rather than by area?
Yes. Click Add to Quote and enter a whole number of rolls. Or use the dynamic calculator to convert your ceiling area to rolls and carry that result into the form automatically.
Does a thinner blanket have any acoustic value?
Fibrous glasswool can absorb some sound, but results depend on the complete construction and the type of noise. Do not expect 50mm Aerolite Insulation alone to act as a dedicated soundproofing barrier.
PLAN THE TOP-UP WITH CONFIDENCE
Request your 50mm Aerolite Insulation quote.
Enter your rolls or measured ceiling area. Tell us where they need to go and what is already in the roof space.
