Concrete & Aircrete Blocks for Watford, delivered to site

Which concrete blocks can you order in Watford?

• Hollow and cellular blocksLighter dense blocks with voids, used for some garden and retaining walls.
• Trench and foundation blocksWide blocks laid in foundation trenches instead of lots of concrete.
• Dense concrete blocksHeavy, strong blocks for loadbearing walls, below ground and good sound separation.
• Aircrete (aerated) blocksVery light, easy to cut and good insulators; check the strength grade for loadbearing work.

Working out quantities for your Watford job

A single-skin block wall in Watford 4 m long and 2.7 m high is 10.8 m². At 10 blocks per square metre plus 5% you need 114 blocks, with about 0.16 tonnes of building sand and 2 bags of cement for the mortar at 1:4. Try the block calculator

Getting the right concrete blocks

What strength do I need?

Most houses use 3.6 N/mm² or 7.3 N/mm² blocks. Your structural design, your building control officer or the block manufacturer's guidance sets the grade; tell us what is specified and we will match it.

Handling heavy blocks

Health and safety guidance discourages laying very heavy blocks by hand for long periods. Lighter blocks or planning the lift can make a big difference on site.

In England, building work is checked against the Approved Documents, for example Part A for structure and Part L for energy efficiency, through your council's building control team or a registered building control approver.

Delivery to Watford: what helps

Blocks are banded on pallets and usually crane-offloaded where the vehicle and access allow; tell us the weight limit of any drive or the ground where pallets will sit. Watford is inside our standard mainland delivery area.

• If neighbours share the access, it helps to let them know a lorry is coming.
• Have someone on site for the delivery if you can, or agree a safe drop point with us in advance.
• Weight limits on bridges or private roads near the site matter for larger lorries, so mention any you know of.

Concrete & Aircrete Blocks in Watford: questions

How much mortar for blockwork?

Roughly 0.008 to 0.01 cubic metres of mortar per square metre of 100 mm blockwork, allowing for waste. Use our block calculator for sand and cement quantities.

What is the difference between 3.6 and 7.3 N/mm² blocks?

The number is the compressive strength. 7.3 N/mm² blocks carry more load and are often specified below ground or for heavily loaded walls; 3.6 N/mm² is common for upper storeys and partitions. Follow your drawings.

Do you deliver concrete blocks to Watford?

Yes. We deliver across Watford, including WD17, WD18, WD19, WD24. Watford is inside our standard mainland delivery area. Send your list or call 0800 088 6341 and we will price it delivered to your postcode.

Is there a minimum order for delivery to Watford?

There is no fixed minimum. For very small orders we will tell you honestly if the delivery cost outweighs the materials, so you can decide.