Concrete & Aircrete Blocks delivery in Harpenden

Our concrete blocks range for Harpenden jobs

• Dense concrete blocksHeavy, strong blocks for loadbearing walls, below ground and good sound separation.
• Lightweight aggregate blocksLighter to handle with better thermal performance than dense blocks.
• Aircrete (aerated) blocksVery light, easy to cut and good insulators; check the strength grade for loadbearing work.
• Hollow and cellular blocksLighter dense blocks with voids, used for some garden and retaining walls.
• Block paving and edgingsOn request alongside your sub-base and sand.

Picking the right product

Dense or aircrete?

Dense blocks are strong and good for sound separation but heavy; a 100 mm dense block can weigh around 20 kg. Aircrete blocks are much lighter and insulate better, which helps with energy targets, but need the right fixings.

Thickness

100 mm is the common inner-leaf thickness. Wider blocks (140, 190, 215 mm) are used for separating walls, single-skin garage walls and foundations.

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.

Quantities: a worked example

A single-skin block wall in Harpenden 6 m long and 2.4 m high is 14.4 m². At 10 blocks per square metre plus 5% you need 152 blocks, with about 0.21 tonnes of building sand and 2 bags of cement for the mortar at 1:4. Try the block calculator

Planning the drop in Harpenden

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. Harpenden is inside our standard mainland delivery area.

• If the site is up a shared drive or behind other houses, tell us the distance from the road.
• In summer Harpenden gets around 16h 42m of daylight, but early deliveries still beat the traffic and give the longest working day.
• Keep cement, plaster and boards dry: have a tarpaulin or a garage space ready before they arrive.

Common questions from Harpenden

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.

Can I add other materials to my Harpenden delivery?

Yes. Put everything on one list, from concrete blocks to fixings and PPE, and we will price it as one delivery where the products can travel together.

Are aircrete blocks strong enough for an extension?

Many aircrete blocks are designed for loadbearing walls, but grades differ. Check the strength your design calls for and the manufacturer's guidance on use below DPC.

Is there a minimum order for delivery to Harpenden?

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.