Higher product R-value
135mm
135mm Aerolite insulation
For projects specifying the 135mm roll. Check the complete roof and ceiling requirement before choosing.
- Coverage per roll
- 6 m²
- Product R-value
- 3.38 m²·K/W
- Unrolled dimensions
- 5 m × 1.2 m
Aerolite insulation · Supply & installation
Cape Town: 021 837 1824
The Aerolite learning & product hub
Aerolite installers.
Start with the
right know-how.
Learn how to install Aerolite insulation, understand the different roll thicknesses and work out what to buy. Practical guidance for homeowners, DIY projects and the trade.
Installation information & product supply. No installation bookings through this website.
Aerolite® Soft TouchKnow your options
Useful knowledge. Clear product choices.
A good installation starts before you open a roll.
Aerolite Installers helps you connect the practical questions: where the insulation goes, which thickness your project needs and how many rolls to order. Start with the guidance, then explore the product details in our shop.
Whether you plan to do suitable work yourself or appoint independent Aerolite installers, use the same starting point: a checked roof space, a clear specification and measured ceiling areas. Arrange installation separately with your chosen contractor.
Learn the method
How to install Aerolite insulation: start here.
This Aerolite Installers overview explains the sequence for ceiling-level insulation. Read the current manufacturer’s instructions before starting; the roof structure, services and specified build-up determine the details.
Position illustrated schematically. This is not a construction detail or a walking surface.
Watch Isover’s installation tutorialManufacturer’s video · opens on YouTubeCheck the roof space
Check access, leaks, ceiling condition and existing insulation. Identify electrical fittings and other services before work starts. Resolve defects first and use a competent contractor where safe access or the condition is uncertain.
Measure the ceiling area
Measure each ceiling section and record its area. Use the horizontal ceiling footprint for ceiling-level insulation. Keep a separate measurement of the spaces between trusses for cutting the blanket.
Confirm the product thickness
Choose the specified thickness and product R-value before ordering. Your location, roof construction and existing layers matter. A thinner roll covering more area is not a substitute for the required thermal performance.
Cut and roll out carefully
Isover describes cutting the packaged roll to fit between trusses, then unrolling it above the ceiling. Follow its current fitting instructions and allow the blanket to recover without compressing it.
Respect fittings and access
Maintain the clearances required by light fittings, flues and other equipment. Keep necessary ventilation and access routes clear. Have a qualified electrician assess electrical concerns; do not move wiring as part of a DIY insulation job.
Inspect the completed coverage
Check for missed sections, gaps and compressed areas. Keep packaging details and project photographs for your records. Store any unused rolls dry and protected until they are needed.
Reference: Isover Aerolite Soft Touch technical data and installation instructions ↗
Choose with the specification in mind
Three thicknesses.
A clearer buying decision.
Compare coverage and thermal resistance, then open the product for current pricing and ordering. Aerolite Installers keeps the buying information close to the practical guidance.
A specified 100mm layer
100mm
100mm Aerolite insulation
For applications where 100mm is specified. Confirm suitability instead of choosing by roll price alone.
- Coverage per roll
- 7.2 m²
- Product R-value
- 2.50 m²·K/W
- Unrolled dimensions
- 6 m × 1.2 m
Suitable assessed top-ups
50mm
50mm Aerolite insulation
Consider for an assessed top-up to existing insulation. It is not a universal replacement for a thicker layer.
- Coverage per roll
- 12 m²
- Product R-value
- 1.14 m²·K/W
- Unrolled dimensions
- 10 m × 1.2 m
Product R-value describes the insulation itself, not the total roof assembly. See Isover’s published product data and confirm the required build-up for your project.
Plan your purchase
Your ceiling area.
Your roll quantity.
Use the Aerolite Installers calculator to estimate whole rolls. Enter the area you intend to insulate, choose the thickness and add a cutting allowance if your layout needs one.
Ceiling area ÷ roll coverage = rolls.
Round up to a whole roll. For example, 120 m² using 135mm rolls needs 20 rolls before allowance, or 21 with 5%. This estimates material quantity, not installation cost or compliance.
If someone else is doing the work
Choosing Aerolite installers for your project.
If you appoint independent Aerolite installers, agree the job in writing before buying materials. A useful quotation explains the product, thickness, measured area and what the contractor will actually do.
Aerolite Installers provides information and product supply through this website. Contractor selection, site assessment and installation arrangements remain between you and your chosen installer.
- Ask for the exact product specificationRecord thickness, product R-value and the proposed roof build-up. Avoid comparing quotations that describe different work.
- Clarify preparation and accessAgree how leaks, damaged areas, old material and restricted access will be handled before the insulation goes in.
- Check experience and the written scopeAsk prospective Aerolite installers for relevant references, clear terms and details of any workmanship guarantee they offer.
- Agree the final inspectionDiscuss how coverage, service clearances and any inaccessible areas will be recorded. Keep your product and purchase details.
Measure room by room
Keep a simple area schedule. Aerolite installers and homeowners can use the same measurements to discuss quantities and spot missing sections before ordering.
Keep supply and labour clear
Product prices in the shop relate to materials. Ask separately about delivery and arrange any fitting work directly with your chosen contractor.
Use a specification, not a guess
Existing insulation needs assessment before a top-up. Aerolite installers should consider the condition and performance of the complete ceiling build-up.
Before you get started
Good questions.
Practical answers.
The Aerolite Installers guide brings product selection and installation planning together. For a question about buying rolls, send us the area, thickness and delivery location.
Ask a product question ↗Does Aerolite Installers offer installation services?
No. This website focuses on installation tutorials, product information and Aerolite roll sales. We do not book installation teams through this site. Arrange fitting separately with an independent contractor.
Can I install Aerolite insulation myself?
Some projects may be suitable for a capable DIY installer with safe access and the right equipment. Roof-space risks, electrical services and the specification must be assessed first. If these are uncertain, use a competent contractor.
Which Aerolite thickness should I buy?
Choose by the required thermal performance and the roof and ceiling build-up. The 135mm, 100mm and 50mm rolls have different product R-values. Coverage per roll alone does not determine suitability.
Can 50mm Aerolite be used as a top-up?
Isover identifies 50mm for suitable top-up applications. Check the existing material, its condition and the required overall performance before adding another layer. A top-up should follow a clear specification.
How do I compare Aerolite roll prices?
Compare the same thickness and specification first. Divide the current roll price by its coverage to find the material cost per square metre, then account for whole-roll quantities and delivery. The product pages show current pricing.
Does insulation make a room completely soundproof?
No. Glasswool can contribute to sound absorption, but sound control depends on the complete ceiling or wall system, including gaps, boards and other transmission paths. Do not treat a roll of insulation as a complete soundproofing system.
Learn the method. Get the rolls.
Use Aerolite Installers to plan your next step, compare the range and buy the insulation your project calls for.