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View Product Reviews170mm Knauf Loft Roll 44 Insulation Combi-Cut (8.01m2/Roll)
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- Choose Clearpay at checkout to pay later with Pay in 4.
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Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/en-GB
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{home}} Use in floors and pitched roofs
- {{local_fire_department}} A1 non-combustible
- {{thermostat}} 0.044 W/mK thermal conductivity
- {{build}} Easy to handle and install
- {{content_cut}} Ready-cut for use at 600mm or 400mm centres
- {{public}} Zero Ozone Depletion Potential (ODP)
Technical Specification
| Material Type: | Glass Mineral |
|---|---|
| Thickness: | 170mm |
| Width: | 1140mm |
| Length: | 7030mm |
| Sales Unit: | Roll |
| Sales Unit Coverage: | 8.01m2 |
| Brand: | Knauf Insulation |
| Manufacturer's Reference: | 2404156 |
| Thermal Conductivity: | 0.044W/mK |
| Fire Rating: | A1 Non-Combustible |
Technical Downloads
Product Overview
Glass mineral wool insulation roll, measuring 170mm in thickness and supplied in a combi-cut format for loft applications.
Manufactured using ECOSE® Technology with a high recycled content, the roll provides effective thermal insulation with reduced environmental impact.
Combi-cut part-splits allow installation as either 2 × 570mm or 3 × 380mm widths, aligning with both 400mm and 600mm joist centres for straightforward fitting and minimal waste.
The flexible composition adapts to minor surface irregularities and knits together at joins, helping to maintain continuous coverage without gaps.
With a thermal conductivity of 0.044 W/mK and a Euroclass A1 non-combustible rating, the roll delivers dependable thermal performance and the highest level of fire safety.
At 170mm thick, it is well suited for use as a primary layer between loft joists, and can be combined with a secondary top-up layer to achieve or exceed Building Regulation requirements.
Features & Benefits
- Glass mineral wool composition: Provides dependable acoustic absorption alongside strong thermal insulation.
- Made from recycled glass: High recycled content supports sustainability and reduces environmental impact.
- ECOSE® Technology: Uses a formaldehyde-free binder for improved indoor air quality and lower embodied energy.
- Combi-Cut flexibility: Pre-split to suit both 400mm and 600mm joist centres, reducing waste and speeding up installation.
- Resilient quilt form: Recovers thickness after compression, ensuring consistent thermal performance.
- Adapts to surfaces: Conforms to slight irregularities in the substrate to improve coverage.
- Knits together in place: Quilts interlock to minimise air gaps, maintaining reliable performance across the loft area.
- Euroclass A1 fire rating: Non-combustible for maximum fire safety within the building fabric.
- Thermal conductivity 0.044 W/mK: Ensures effective heat retention, supporting energy savings.
- Lightweight and flexible: Easy to handle, carry, and fit in confined loft spaces.
- 170mm thickness: Provides strong thermal performance as a primary layer, with the option of combining with additional layers for maximum efficiency.
Applications
- Primary loft insulation: Commonly installed between timber joists at ceiling level as the main insulation layer.
- Top-up option: Can be paired with thinner rolls to bring total loft insulation to the recommended depth.
- Pitched roofs at ceiling level: Designed for cold roof applications, installed between and across joists.
- Overlay insulation: May be cross-laid above joists to improve thermal resistance and minimise thermal bridging.
- Suspended timber floors: Suitable for installation between joists in timber floor systems where greater insulation depth is achievable.
Installation Guidance
- Install between joists as first layer: Creates base thermal coverage.
- Lay second layer at right angles: Enhances performance by reducing gaps.
- Ensure tight fit with no voids: Maintains insulation continuity.
Compliance & Performance
- BS EN 13162 certified: Meets requirements for mineral wool insulation products.
- Euroclass A1 fire rating: Fully non-combustible material.
- Generic BRE Green Guide rating A+: Recognised as environmentally preferable.
- Zero ODP and Zero GWP: Contains no ozone-depleting or greenhouse gas substances.
- DECLARE Red List Free label: Free from formaldehyde, phenol, and other restricted substances.
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