.jpg)
.jpg)
1 Review
View Product Reviews50mm Knauf DriTherm Cavity Wall Insulation Slab 37 (6.55m2/Pack)
Product
Coverage required
Product
Nationwide Delivery
Wed 10 Jun
- 0days
- 0hrs
- 2mins
- 17secs
lock Secure checkout (powered by Stripe)
Learn more
Pay in 3 interest-free payments
Split your purchase of £23.58 into 3 with no sign-up fees or late fees.
£7.86
today
£7.86
1 month
£7.86
2 months
How it works
- Choose PayPal at checkout to pay later with Pay in 3.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Pay in 3 is a form of credit, so carefully consider whether the purchase is affordable and how you will make the repayments. Be aware of the possible impact of using Pay in 3 and of missing payments, including making other borrowing more difficult or more expensive. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Available for purchases of £30 to £2,000. Terms and conditions apply. PayPal Pay in 3 is a trading name of PayPal (Europe) S.à r.l. et Cie, S.C.A. 22-24 Boulevard Royal L-2449, Luxembourg.
Learn more
Buy now. Pay with Klarna at your own pace.
Get what you need for your next project, choose how you pay.
Pay in 30 days
£23.58
Pay in full
Klarna's Pay in 30 days is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
Pay over time
£7.86
Every 30 days
Pay in 3
£7.86
today
£7.86
in 30 days
£7.86
in 60 days
Klarna's Pay in 3 is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
How it works
- At checkout select Klarna.
- Choose your payment plan.
- Different payment plans may be shown depending on the purchase amount and credit score.
- Complete your checkout.
- The amount will be charged based on the payment plan you chose.
Learn more
Pay in 4 interest-free payments
Split your purchase of £23.58 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
£5.90
today
£5.90
second payment
£5.90
third payment
£5.90
fourth payment
How it works
- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
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
Key Features
- {{home}} Use in external masonry cavity walls
- {{local_fire_department}} A1 non-combustible
- {{thermostat}} 0.035 W/mK thermal conductivity
- {{water_drop}} Water repellent
- {{public}} Zero Global Warming Potential (GWP)
- {{verified_user}} BBA certified
Technical Specification
| URN: | 3002126 |
|---|---|
| Product: | DriTherm 37 |
| Brand: | Knauf Insulation |
| Material Type: | Glass Mineral |
| Thickness: | 50mm |
| Width: | 455mm |
| Length: | 1200mm |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 6.55m2 |
| Pieces Per Pack: | 12 |
| Fire Rating: | A1 Non-Combustible |
| Thermal Conductivity: | 0.037W/mK |
| Manufacturer's Reference: | 316650 |
Technical Downloads
Product Overview
Full-fill glass mineral wool insulation slab, measuring 50mm in thickness, for use in masonry cavity walls.
Produced with a high recycled glass content and ECOSE® Technology, it delivers strong thermal insulation while allowing vapour to pass through, supporting a healthier building fabric.
A thermal conductivity of 0.035 W/mK ensures effective energy efficiency, reducing heat loss and supporting compliance with modern Building Regulations.
With a Euroclass A1 non-combustible rating and full BBA certification for every UK exposure zone, it also delivers confidence in fire protection, durability, and performance over time.
At 50mm thick, the slab is suited to narrow cavity widths often found in older properties and refurbishment projects, offering a practical insulation solution where space is restricted while still delivering reliable thermal and acoustic performance.
Features & Benefits
- Non-combustible Euroclass A1 fire rating: Ensures maximum fire safety in external walls.
- Thermal conductivity 0.035 W/mK: Reliable thermal efficiency for narrow cavities.
- Water-repellent additive: Stops moisture transfer while staying vapour permeable.
- 455mm width: Fits standard wall tie spacing for a close jointed finish.
- Slabs knit together: Prevents air gaps and reduces thermal bridging.
- Lightweight and cuttable: Simple handling and fitting on site.
- ECOSE® Technology binder: No added formaldehyde and reduced embodied energy.
- 50mm thickness: Ensures that restricted cavities are fully filled, stopping draughts and heat loss while maintaining breathability.
Applications
- Narrow cavity walls (50mm): Designed for older housing and properties built with very slim cavity widths.
- Refurbishment and retrofits: Practical solution for upgrading insulation where cavity depth is restricted.
- Masonry cavity external walls: Provides long-term performance in narrow external wall constructions.
- Space-limited projects: Suitable for situations where maintaining a thinner wall build-up is essential.
Installation Guidance
- Cut to fit: Slabs can be trimmed cleanly with a sharp knife for an accurate fit.
- Close-butt joints: Ensure slabs are tightly butted together with no gaps to maintain insulation performance.
- Keep dry before fitting: Store indoors or under cover to protect the slabs until installation.
Compliance & Performance
- Euroclass A1 to BS EN 13501-1: Highest level of non-combustibility.
- BBA certified for all exposure zones: Approved for UK use in severe weather locations.
Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £45 ex. VAT |
| Over £400 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £90 ex. VAT |
| Over £400 ex. VAT | £55 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 |
How delivery works
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
- Deliveries are typically kerbside.
- Please ensure someone is on-site to accept delivery. For heavier items, help with offloading may be required.
- Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
Returns
Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
Customer Reviews
excellent glass mineral wool. best price. heard Materials Market will off credit account soon, can't wait!
Leave a Review
Related Articles
