170mm Knauf Loft Roll 44 Combi-cut
1140mm x 7.03m | 8.01m² per pack
FREE delivery over £500 excluding VAT
170mm Knauf Loft Roll 44 Combi-cut
1140mm x 7.03m | 8.01m² per pack
FREE delivery over £500 excluding VAT
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Product Description
Product Description
Knauf Loft Roll 44 (170mm) is a glass mineral wool loft insulation roll for insulating cold pitched roofs at ceiling level, and it can also be used between joists in suspended timber floors. It is the most practical choice for reaching the standard loft depth in a two-layer installation: laid as a cross-laid layer over a 100mm base between the joists, it brings total depth to 270mm, the depth commonly used to meet the 0.16 W/m²K roof U-value target under Part L of the Building Regulations in England and Wales. Laying the second layer at right angles to the first helps reduce thermal bridging across the joists for more consistent coverage. Where higher performance or a greater depth is specified, a second 170mm cross-laid layer takes the total to 440mm.
Thermal conductivity is 0.044 W/mK and thermal resistance is 3.85 m²K/W, giving reliable thermal performance across loft applications. As a glass mineral wool, it also offers a degree of acoustic absorption, helping to soften airborne sound through the ceiling. Each roll measures 1140mm wide by 7.03m long and covers 8.01m², and carries a Euroclass A1 non-combustible reaction-to-fire classification, the best possible rating, meaning the product does not burn.
The combi-cut format means the roll is partially perforated to give widths of 2 x 570mm or 3 x 380mm, so it can be split to sit neatly between joists at standard centres or laid uncut as a full-width cross-laid layer. This reduces cutting and offcuts on site, speeding up installation and helping maintain continuous coverage with fewer gaps.
Manufactured using ECOSE® Technology, Knauf's bio-based binder, it contains no added formaldehyde or phenol, is CFC and HCFC free, and has zero ozone depletion potential. Made with up to 80% recycled glass content, it is one of the more environmentally responsible loft insulation products available. Modern manufacturing means it is classed as low itch and more pleasant to handle, though gloves and basic protection remain sensible when working with any mineral wool. Rot proof, odourless and non-hygroscopic, it will not attract rodents or support the growth of mould, fungi or bacteria, and will last for the lifetime of the building.
Install in line with the Knauf Loft Roll Installation Guide and the project specification, taking care not to block eaves ventilation. A full step-by-step walkthrough is available in the [loft insulation guide](LOFT INSULATION GUIDE LINK). Suitable for both new build and renovation work, it offers a straightforward route to improving loft thermal performance and reducing heat loss.
Benefits
- Thermal conductivity of 0.044 W/mK: reliable, effective thermal performance for loft applications
- Thermal resistance (R-value) of 3.85 m²K/W for the 170mm roll
- Euroclass A1 non-combustible: the best possible reaction-to-fire classification, meaning the product does not burn
- Combi-cut format, partially perforated at 2 x 570mm and 3 x 380mm to suit standard joist centres
- 8.01m² coverage per roll
- The practical choice for reaching the 270mm standard loft depth as a cross-laid layer over a 100mm base
- Also suitable as a primary single layer between joists, or in suspended timber floors
- Manufactured with ECOSE® Technology, a bio-based binder with no added formaldehyde or phenol
- Made with up to 80% recycled glass content: CFC free, HCFC free, with zero ozone depletion potential
- Rot proof, odourless and non-hygroscopic: will not attract vermin or support mould or fungi
- Lightweight, low-itch and easy to handle on site
- BRE Green Guide rating A+
Good to know
- Thickness: 170mm; width: 2 x 570mm or 3 x 380mm; length: 7.03m; coverage: 8.01m² per roll
- Thermal resistance: 3.85 m²K/W; vapour resistivity: 5.00 MNs/g.m
- Packs per pallet: 24; pallet product code: 2404156
- 100mm base plus a 170mm cross-laid layer gives 270mm total, the standard depth for the 0.16 W/m²K roof U-value target under Part L
- 100mm base plus two 170mm cross-laid layers gives 440mm total, for a U-value of approximately 0.10 W/m²K where higher performance is wanted
- Keep insulation clear of downlights and other heat-producing fixtures, using non-combustible covers where required
- Store indoors, dry and flat; protect from prolonged sunlight and moisture
- Always refer to the Knauf Loft Roll Installation Guide before installation
Certifications & Standards
Certifications & Standards
Product FAQs
Product FAQs
What is the thermal conductivity of Knauf Loft Roll 44 170mm?
What is the coverage of Knauf Loft Roll 44 170mm?
What is the 170mm Knauf Loft Roll 44 used for?
Does 170mm Knauf Loft Roll 44 meet building regulations?
Is the 170mm the right roll for a two-layer loft insulation installation?
What fire rating does Knauf Loft Roll 44 170mm have?
Is Knauf Loft Roll 44 170mm environmentally friendly?
Customer Information
Customer Information
Free delivery on orders over £500 ex-VAT. All orders below £500 (ex-VAT) are subject to a £50 delivery charge.
Ordering & Delivery
How do I place an order with Insulation UK?
You can place an order for delivery anytime online. If you want to collect from our distribution centre in South Yorkshire then please email us your requirements at sales@insulationuk.co.uk
and we will send a payment link and collection instructions. If you can’t see what you are looking for or need more information, then call our team on 03003 034 578 and we can sort your order from there.
How do I know what’s happening with my order and when I will receive it?
When you have placed your order, you will then receive an email confirmation, giving you an order reference number and asking you to double check everything is correct on your order such as delivery address, quantities etc. If there are any amendments to be made, then please reply to your confirmation email with any details.
Once the team has processed the order you will receive an email with a BY delivery date, this is the latest date you will receive your delivery.
Your final email will be a 24/48hr notification, on the day of the delivery if you need a more accurate ETA then contact the office on 03003 034 578.
Do you offer next-day delivery?
Yes, we do on certain lines, you will see our next day delivery products marked as NEXT DAY. Order before 12pm for next day delivery (charges will apply)
How much does delivery cost and how long will it take?
Standard delivery is £50 + VAT for all orders below £500 excluding VAT, above £500 excluding VAT delivery is free. Bespoke deliveries can be made but will incur charges. Each product page gives you an estimate delivery by date. For more accurate information call the team on 03003 034 578
Can I choose a specific delivery date or time slot?
We will endeavour to try and accommodate a preferred date, if you need a delivery on a certain day, then please call us on 03003 034 578.
Do you deliver nationwide?
We deliver across most of the UK; however, some postcodes are restricted due to their location. Check out our delivery map for more information. If you find that you are in area we don’t deliver to, we have access to a wide range of haulage options, please call the team on 03003 034 578 to discuss your requirements further.
Will the driver help unload the insulation products?
Most of our deliveries are made with vehicles with mechanical off-load (known as a moffett or fork-lift), the driver will leave them in a safe place of your choice. They will help as much as they are allowed but are not insured to bring anything into a property.
What happens if my order arrives damaged or incomplete?
In the unlikely event your order arrives damaged, then please contact within 48 hours at sales@insulationuk.co.uk with any images of the damage and the team will be in touch. If there is anything missing, then notify the team within 48 hours on 03003 034 578
What if my order doesn’t arrive and I have paid for trades to be on site, can I claim anything towards the costs I have incurred?
We advise not to have trades booked in and around the day of your delivery. Things can happen beyond our control, and your delivery may be delayed or abandoned. We cannot be held liable for any consequential loss such as tradesman wages etc.
Product Advice & Support
How do I know which insulation product is right for my project?
With such a variety of insulation products, we fully understand making sure you have the right one can seem daunting. Our team have over 50 years of experience in the construction industry and there isn’t a question they haven’t been asked! Speak to our technical team on 03003 034 578 and they will be happy to offer some help and guidance.
Do you offer technical advice or support before I buy?
Yes we do! Just call 03003 034 578 and ask for our technical team and we will be happy to support you.
Product Information & Suitability
Product descriptions on this website are provided as general guidance only and are not a substitute for the manufacturer’s Technical Data Sheet (TDS), fire classification information, and the project’s design/specification requirements. Suitability depends on the full build-up and intended use (including any requirement for encapsulation, coverings, and compliance with Building Regulations and the project fire strategy).
It is the customer’s responsibility to confirm, before ordering, that the product specification and performance are suitable for the intended application by reviewing the relevant TDS and taking professional advice where required. If you are unsure, contact us before purchase and provide your intended build-up so we can confirm what information we can support.
Nothing in this notice limits or excludes your statutory rights
Can I speak to someone to confirm product specifications?
Of course you can! There is also a range of data sheets and guides available on the product pages under Technical Information.
Are your products suitable for both DIY and trade customers?
Yes, they are. If you are new to DIY projects involving insulation,
then we advise to always do your research. We have a handy guides section which may help.
Do you offer fire-rated or eco-friendly insulation options?
Yes, we do. Fire ratings are indicated in the specification table on the product page, and our sustainable range is continually growing.
Pricing & Payments
Do you offer trade or bulk-buy discounts?
We always aim to offer the best price online; however we do offer project pricing for larger orders, speak to our sales team with your requirements on 03003 034 578.
What payment methods do you accept?
We accept all major cards including American Express, as well as Apple Pay, Google Pay and PayPal
Can I set up a trade account with credit terms?
We do offer trade accounts, however there are certain criteria we ask for, and any credit account application is subject to credit checks. Call the team on 03003 034 578 to discuss any credit applications.
Do your prices include VAT?
The website has a toggle at the top right of the page so the prices can be displayed including and excluding VAT. VAT, where applicable, is charged at checkout.
Returns & Cancellations
Can I return unwanted insulation products?
Contact the team via email sales@insulationuk.co.uk with the items you wish to return and any other information. Please note if we you need us to collect any unwanted items,
a collection fee will apply.
How do I arrange a return or exchange?
Contact the team via email sales@insulationuk.co.uk or check out our refund policy.
Are there any restocking fees?
Restocking charges will apply in certain instances, please contact the team via email at sales@insulationuk.co.uk check out our refund policy.
What if I’ve ordered incorrectly or need to cancel my order?
Contact the team via email as soon as possible. The best way to get in contact is to reply to any of the emails we have sent you, they will come straight through to the team and will have any relevant order information already on there.
Installation & Compliance
Do you offer installation services or just supply materials?
We do not offer any installation services; we are a supplier of insulation and building materials.
Can I get a datasheet or certificate of performance for your products?
Yes, data sheets can be found in the Technical Information drop down on the product page.
How should I store insulation products before installation?
There are a variety of insulation products each with their own storage instructions. Generally, please keep them off the ground, in a dry area, away from the elements.
Sustainability & Quality
Are your insulation products environmentally friendly?
This depends on the individual products, data sheets are available,
and any environmental benefits are noted on the product pages.
Do your products help reduce energy bills?
The correct insulation properly installed can reduce heat loss from a building and therefore help reduce energy costs.
Are your products made in the UK or imported?
With such a wide variety of products some are made in the UK and some are imported.
Customer Service & Support
How can I contact your support team?
By phone on 03003 034 578, email sales@insulationuk.co.uk or via our
webchat online
What are your opening hours?
Monday to Friday 8am to 5pm for sales and technical support, orders can be placed on line 24/7
How quickly can I expect a reply to my enquiry?
We aim to respond to our customers as quickly as possible.
Customer Reviews
Customer Reviews
Customer Reviews
I needed to top up my loft insulation after the plumbershad installed heat pump and two showers. The rolls came promptly and the delivery guy helped to put them in my garage. They cut easily and roll out a treat, inflating to the 200mm thickness. Good stuff!
Just built a new garage and wanted to insulate the roof and walls, Insulation UK had what I wanted and was in stock, offering great value. Delivery was quick and very thing was in top condition. I would recommend and use them again.
This was better to handle than many, not particularly dusty or itchy, hence less irritation. The only usual irritation is the cost of loft roll, but as said, I found Knauff loft roll good to handle and would buy again
Technical Details
- Brand:
- Knauf
- Material:
- Mineral wool
- Manufacturers Part Number:
- 002404156
- Length:
- 7030 mm
- Width:
- 1140 mm
- Thickness:
- 170 mm
- Unit Coverage:
- 8.01 m²
- Sqm Per Pack:
- 8.01 m²
- Applications:
- Loft
Thermal performance helps show how effectively the product reduces heat transfer.
Thermal conductivity measures how readily heat passes through the material, so lower figures generally indicate better insulating performance.
R Value shows the material’s thermal resistance at that thickness, so higher figures generally mean stronger insulation performance.
These figures relate to the insulation product itself and should be considered alongside the full wall, roof or floor build-up when checking project requirements.
- Thermal Conductivity:
- 0.044 W/mK
- R Value:
- 3.85 M²K/W
Euroclass reaction to fire is the European EN 13501-1 classification used to show how a construction product behaves when exposed to fire.
The main scale runs from A1 and A2 at the highest end, through B, C, D and E, down to F.
A1 is non-combustible and A2 is limited combustibility, while lower classes indicate a greater contribution to fire.
Euroclass F is the lowest rating on this scale and indicates the weakest reaction-to-fire performance.
This is different from fire resistance, which relates to how long a complete wall, floor or roof build-up can resist fire.
- Reaction to Fire:
- Euroclass A1
