300mm Celcon H+H Standard Aerated 3.6N Concrete Foundation Block
Nationwide Delivery
Wed 24 Jun
- 0days
- 11hrs
- 4mins
- 0secs
| 20+ units | 40+ units | 50+ units |
| £7.63ex. VAT | £7.56ex. VAT | £7.48ex. VAT |
Nationwide Delivery
Wed 24 Jun
- 0days
- 11hrs
- 4mins
- 0secs
lock Secure checkout (powered by Stripe)
Learn more
Pay in 3 interest-free payments
Split your purchase of £7.71 into 3 with no sign-up fees or late fees.
£124.67
today
£124.67
1 month
£124.67
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
£7.71
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
£124.67
Every 30 days
Pay in 3
£124.67
today
£124.67
in 30 days
£124.67
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 £7.71 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
£93.50
today
£93.50
second payment
£93.50
third payment
£93.50
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
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
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £25 ex. VAT |
| Over £300 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.
Key Features
- {{fitness_center}} Compressive strength of 3.6N/mm²
- {{home}} Ideal for solid wall construction and load-bearing applications
- {{file_download}} Engineered for below-ground foundation application
- {{whatshot}} Non-combustible design provides exceptional fire safety
Technical Specification
| URN: | 5003291 |
|---|---|
| Brand: | Celcon |
| Application: | Below DPC Internal & External Leaf Cavity Walls |
| Indoor/Outdoor Usage: | Outdoor |
| Material Type: | Autoclaved Aerated Concrete |
| Thickness: | 300mm |
| Length: | 440mm |
| Height: | 215mm |
| Weight: | 22kg |
| Sales Unit: | Each |
| Sales Unit Coverage: | 0.1m2 |
| Fire Rating: | A1 Non-Combustible |
| Moisture Resistant: | Yes |
| Thermal Conductivity: | 0.24W/mK |
| Compressive Strength: | 3.6N |
| Density: | 600kg/m3 |
| Certification: | BBA Certified |
| Product Standard: | BS EN 771-1 |
| Grade: | Foundation Grade |
| Edge: | Square |
| Colour: | Natural / Grey |
| Manufacturer's Reference: | SFC30030 |
Product Overview
300mm Celcon H+H Standard Aerated 3.6N Concrete Foundation Block, designed for below-ground foundation walls and courses below damp proof course.
Provides strength, insulation, and reliable support in low to medium-load residential and commercial applications.
Features & Benefits
- Compressive strength 3.6N/mm²: Suitable for foundation work in multi-storey buildings and heavy-load areas.
- Lightweight aerated concrete: Easier to handle and install, reducing labour effort on site.
- Thermal efficiency: Aerated structure provides better insulation than dense concrete blocks.
- Class A1 fire resistance: Non-combustible, meeting the highest standard for fire safety.
- Frost resistance: Withstands freeze-thaw cycles for long-term durability in varying climates.
- Sulfate resistance (DS1–DS4 soils): Reliable in mild to severe sulfate conditions below ground.
- Quality assurance: Manufactured under strict controls for consistent strength and performance.
- Versatile application: Suitable for foundations, solid walls, cavity walls, and beam & block flooring.
Applications
- Foundation walls (below DPC): Provides a stable, load-bearing base in residential and commercial construction.
- Solid or cavity walls: Supports a wide range of wall designs for structural flexibility.
- Suspended floors: Compatible with beam and block floor systems for ground or basement levels.
- Framed construction support: Used below ground to stabilise structural frames in framed buildings.
Installation Guidance
- Laying below ground without mortar perpends: Ensures proper drainage and installation efficiency.
- Follow engineer’s embedment depth requirements: Guarantees foundations perform to structural design.
- Bed blocks on suitable mortar: Provides stable seating and maximises load-bearing capacity.
Compliance & Performance
- Compressive strength 3.6N/mm²: Meets structural requirements for foundation blockwork.
- Sulfate condition suitability (DS1–DS4): Designed for use in soils with low to high sulfate levels. Resistant to sulfate attack in categories DS1 (mild exposure) through DS4 (severe exposure), ensuring durability across a wide range of ground conditions.
- Please Note: Blocks are designed for below-ground use and must be laid without mortar perpends when installed underground. Always follow engineer’s guidance for load-bearing requirements and soil condition suitability.
- Pallet Charge: Orders requiring a pallet will incur a refundable pallet charge. Our customer service team will confirm if this applies to your order.
