Concrete & Aircrete Blocks delivery in Harrow

Choosing from our concrete blocks range

• 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.
• Trench and foundation blocksWide blocks laid in foundation trenches instead of lots of concrete.
• 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.

Getting the right concrete blocks

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.

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.

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.

Working out quantities for your Harrow job

A single-skin block wall in Harrow 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

How delivery works in Harrow

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. Harrow is inside our standard mainland delivery area.

• On busy streets in Harrow, a parking suspension or a quiet time slot can make offloading safer, so tell us about local restrictions you know of.
• Mention any overhead cables, low branches or narrow gateways, because they decide whether a crane offload is possible.
• Pallets left on a pavement can block the footway, so plan a drop point inside your boundary where you can.

Common questions from Harrow

Do you deliver concrete blocks to trades and homeowners in Harrow?

Both. Trades can apply for a trade account; homeowners and self-builders can order on a delivered quote.

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.

How many blocks on a pallet?

It varies with the block size and maker. We confirm the pallet quantity with your price.

Can I add other materials to my Harrow 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.