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Up to 70% recycled materials and full-cycle verified carbon reductions.

Tough on performance. Kinder on the planet.

  • Up To 70% Recycled Content

    Designed to meet sustainability goals and contribute to eco-conscious construction.

  • Reduced Embodied Carbon

    Up to a 70% carbon reduction from source to site (A1-A4) and third-party verified.

  • Independently Certified

    Accredited with extensive BSI certifications including
BES 6001, ISO 9001, ISO 14001, and ISO 50001.

  • Greener Miles

    HVO-fuelled deliveries cut transport emissions by at least 90%.

  • Class A1 Fire Rating

    Non-combustible for use in high-performance applications.

  • Heritage You Can Build On

    Decades of proven performance. Trusted by architects and contractors across generations.

Cutting Carbon. Not Corners.

Sustainable Ingredients
Recycled sand
Recycled graded wood particles
Natural lightweight expanded clay
70% Recycled. 100% Reliable

Made with 70% recycled content and verified carbon savings across A1–A4 stages, ECO 70 is ideal for projects with green specs.

50% Recycled. 100% Reliable

Made with 50% recycled content and verified carbon savings across A1–A4 stages, ECO 50 is ideal for lower impact construction.

ECO 50

ECO 70

Compare Blocks

This block is green. So is this one.

Up to

70%

Recycled Content
Low impact, high spec.

<20kg

Unit Weight
Easy handling, long lasting.

90%+

Less CO₂

Cleaner deliveries, HVO-driven.

ECO 50

Lighter Impact. Solid Performance.

With 50% recycled content and up to 70% A1-A4 independently verified carbon reductions, ECO 50 is the smart choice for lower-impact construction with solid technical performance.

  • Medium Dense
  • Class A1 Fire Rated
  • Up to 48dB Sound Reduction
  • <20kg for Easier Handling
  • Airtight and Paint Ready
Make Enquiry
Specify on NBS
Datasheet

ECO 70

Eco-Friendly. High-Performance. One Smart Block.

Our next-generation concrete block combines 70% recycled content with excellent technical performance including up to 69% A1–A4 independently verified carbon reductions.

  • Medium Dense
  • Class A1 Fire Rated
  • Up to 48dB Sound Reduction
  • <20kg for Easier Handling
  • Airtight and Paint Ready
Make Enquiry
Specify on NBS
Datasheet
Download Product Range Datasheet
Download EPDs

See your Carbon Savings with Lignacite ECO

1
Select your block
ECO 50
ECO 70
2
How many m2 of blocks do you need?
XXXX m²
For other quantities, please contact quotes@lignacite.co.uk
3
Choose your delivery method

HVO delivery cuts transport emissions by at least 90%.
A cleaner alternative to diesel, powered by renewable, plant-based fuel.

Standard
(Diesel)
HVO
(Hydrotreated Vegetable Oil)
By using Lignacite ECO, you’ll save
9,320kg of CO2*
That's the equivalent to:
XXXX
Hours on the train
XXXX
Litres boiled in a kettle
XXXX
Trees planted
*Compared to our Lignacite Standard block.
Data Source: clevercarbon.io
Note: HVO delivery (A4 stage) based on a 50-mile radius of Nazeing (EN9).

Built by Lignacite

Compare Blocks

Lignacite ECO Range vs Lignacite Standard Range

Block Size:

100mm

140mm

Block Type
Form
Dry Density (kg/m3)
Approximate Weight (kg)
Compressive Strength (N/mm2)
Thermal Conductivity (W/mK)
Reaction to Fire
Moisture Movement (mm/m)
Weighted Sound Reduction (dB)
Air Tightness (m3/hr/m2)
Block painted on one site with two coats
% of Recycled Content
Embodied Carbon (kgCO2e/m2)**
% Reduction in Embodied CO2**
In comparison to the Standard Lignacite block
Download Comparison Table
ECO 50
Medium Dense PG
Medium Dense PG
Solid
Solid
1570
1450
14.9
19.2
7.3
7.3
0.90
0.79
Class A1
Class A1
< 0.7
< 0.7

Bare Block 44
Painted Block 45

Bare Block 47
Painted Block 48

0.60
0.56*
50%
50%

A1-A3 6.5
A1-A4 6.6

A1-A3 17.3
A1-A4 17.4

A1-A3 68%
A1-A4 70%

A1-A3 47%
A1-A4 52%

Datasheet
ECO 70
Medium Dense PG
Medium Dense PG
Solid
Solid
1570
1450
14.9
19.2
7.3
7.3
0.90
0.79
Class A1
Class A1
< 0.7
< 0.7

Bare Block 44
Painted Block 45

Bare Block 47
Painted Block 48

0.60
0.56*
70%
70%

A1-A3 6.8
A1-A4 6.9

A1-A3 17.3
A1-A4 17.4

A1-A3 67%
A1-A4 69%

A1-A3 47%
A1-A4 52%

Datasheet
Lignacite
Medium Dense PG
Medium Dense PG
Solid
Solid
1570
1450
14.9
19.2
7.3
7.3
0.90
0.79
Class A1
Class A1
< 0.7
< 0.7

Bare Block 46
Painted Block 47

Bare Block 49
Painted Block 50

0.50
0.25
Up to 30%
Up to 30%

A1-A3 20.9
A1-A4 22.2

A1-A3 32.8
A1-A4 36.2

A1-A3 N/A
A1-A4 N/A

A1-A3 N/A
A1-A4 N/A

Datasheet
Block Size:

100mm

140mm

Download Comparison Table
Lignacite
Block Type
Medium Dense PG
Medium Dense PG
Form
Solid
Solid
Form
Solid
Solid
Dry Density (kg/m3)
1570
1450
Approximate Weight (kg)
14.9
19.2
Compressive Strength (N/mm2)
7.3
7.3
Thermal Conductivity (W/mK)
0.90
0.79
Reaction to Fire
Class A1
Class A1
Moisture Movement (mm/m)
< 0.7
< 0.7
Weighted Sound Reduction (dB)

Bare Block 46
Painted Block 47

Bare Block 49
Painted Block 50

Air Tightness (m3/hr/m2)
Block painted on one site with two coats
0.50
0.25
% of Recycled Content
Up to 30%
Up to 30%
Embodied Carbon (kgCO2e/m2)**

A1-A3 20.9
A1-A4 22.2

A1-A3 32.8
A1-A4 36.2

% Reduction in Embodied CO2**
In comparison to the Standard Lignacite block

A1-A3 N/A
A1-A4 N/A

A1-A3 N/A
A1-A4 N/A

Datasheet
ECO 70
Block Type
Medium Dense PG
Medium Dense PG
Form
Solid
Solid
Form
Solid
Solid
Dry Density (kg/m3)
1570
1450
Approximate Weight (kg)
14.9
19.2
Compressive Strength (N/mm2)
7.3
7.3
Thermal Conductivity (W/mK)
0.90
0.79
Reaction to Fire
Class A1
Class A1
Moisture Movement (mm/m)
< 0.7
< 0.7
Weighted Sound Reduction (dB)

Bare Block 44
Painted Block 45

Bare Block 47
Painted Block 48

Air Tightness (m3/hr/m2)
Block painted on one site with two coats
0.60
0.56*
% of Recycled Content
70%
70%
Embodied Carbon (kgCO2e/m2)**

A1-A3 6.8
A1-A4 6.9

A1-A3 17.3
A1-A4 17.4

% Reduction in Embodied CO2**
In comparison to the Standard Lignacite block

A1-A3 67%
A1-A4 69%

A1-A3 47%
A1-A4 52%

Datasheet
ECO 50
Block Type
Medium Dense PG
Medium Dense PG
Form
Solid
Solid
Form
Solid
Solid
Dry Density (kg/m3)
1570
1450
Approximate Weight (kg)
14.9
19.2
Compressive Strength (N/mm2)
7.3
7.3
Thermal Conductivity (W/mK)
0.90
0.79
Reaction to Fire
Class A1
Class A1
Moisture Movement (mm/m)
< 0.7
< 0.7
Weighted Sound Reduction (dB)

Bare Block 44
Painted Block 45

Bare Block 47
Painted Block 48

Air Tightness (m3/hr/m2)
Block painted on one site with two coats
0.60
0.56*
% of Recycled Content
50%
50%
Embodied Carbon (kgCO2e/m2)**

A1-A3 6.5
A1-A4 6.6

A1-A3 17.3
A1-A4 17.4

% Reduction in Embodied CO2**
In comparison to the Standard Lignacite block

A1-A3 68%
A1-A4 70%

A1-A3 47%
A1-A4 52%

Datasheet
Data accurate as of 01/05/2025

*Estimated figure based on industry benchmarks.

**A1-A4 data based on HVO-fuelled deliveries only, within a 50-mile radius of Nazeing (EN9).

Note: The primary factor contributing to the difference in embodied carbon between the 100mm and 140mm blocks is the variation in mix design. This adjustment ensures that the 140mm blocks remain under 20kg in weight.

Reduce Transport Emissions by 90%+ with HVO Delivery

HVO-fuelled transport for deliveries cuts carbon emissions by at least 90% helping your project go greener, right down to the final mile.

Get a Quote

Tell us about your project

Whether you’re early in planning or ready to specify, we’re here to help.

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Lignacite: London's Choice

The Shard

140,000m² blocks used to form the basement for Western Europe’s tallest building.

The Gherkin

10,000m² of blockwork used in the core of this modern London icon.

22 Bishopsgate

8,834m² of Lignacite used including blockwork on the 61st floor, the highest in the city.

Google HQ

Over 18,000m² of blockwork used across 11 storeys in the Google ‘Landscaper’ HQ.

Trusted for London landmarks since 1951

London Stadium
The Cheesegrater
Chelsea Barracks
ExCeL London
Wembley Stadium
Westfield Stratford City

Lignacite has been a trusted partner of Lee Marley Group for over 20 years, delivering high-quality, innovative, and reliable blockwork solutions that underpin many of our complex masonry projects. Their technical support, commitment to collaboration, and investment in training through our apprenticeship scheme have been invaluable. Lignacite continues to exemplify what it means to be a forward-thinking and dependable partner.

Neil Baker – Senior Estimator, Lee Marley Brickwork Ltd

Lignacite are a key member of our supply chain. Their understanding of the complexities of logistics into central London sites and with a history of working in this market it is great that our relationship continues for this many years.

Dave Mills – Business Development Director, Lyons & Annoot Ltd

Lignacite are always our block of choice at Lesterose due to the quality of the product and the overall level of service provided from both a delivery and technical aspect, which is second to none in my opinion. They have been a close partner for many years and have played a significant part in the success of our business. I look forward to many more years of delivering some of the largest and most iconic projects in the UK together.

Sam O’Keeffe – Director, Lesterose Builders Ltd

Lignacite have been supplying Swift Brickwork Contractors Ltd with blocks for approximately 25 years. With manufacturing locations at Brandon and Nazeing, they are well placed to supply our projects in London and the Home Counties region. The quality and consistency of their products are first-class and amongst the best in the market. The technical support offered by Lignacite is invaluable, as is their flexibility in servicing our sites – whether by artic or wagon & drag trailer for the easily accessible locations, or by rigid transport for the more logistically challenging projects in Central London.

Mike Walsh – Chief Executive Officer, Swift Brickwork Contractors Ltd

FAQs

Common questions about Lignacite ECO Range blocks.

  • Why does the Lignacite ECO 50 block offer a slightly higher maximum carbon saving than the ECO 70?

    It’s due to a small difference in embodied carbon: 6.5 kg/m² for the ECO 50 versus 6.8 kg/m² for the ECO 70. This slight variance means the ECO 50 can deliver a marginally greater maximum carbon saving.

  • What do the A1, A2, A3, and A4 stages mean in a product’s life cycle?

    The A1–A4 stages represent key phases in the life cycle of a building product:

    • A1: Raw material extraction
    • A2: Transport to manufacturing
    • A3: Product manufacturing
    • A4: Transport to the construction site

    The embodied carbon captured at each of these stages is outlined in the product’s Environmental Product Declaration (EPD).

  • Is lower or higher air tightness better?

    Lower values are better – they mean less air leakage. Lignacite ECO blocks have excellent airtightness, especially when painted.

  • How much CO₂ do sustainable concrete blocks emit?

    The 100mm Lignacite ECO 50 block has an embodied carbon of 6.6 kg CO₂e/m² (A1–A4). Full values are listed in our EPDs. Carbon values for other sizes can be found in our EPDs. Different sustainable concrete blocks will have varying embodied carbon levels.

    ‍

  • How many Lignacite ECO concrete blocks can be transported on a rigid lorry?

    15 packs of 72 blocks (100mm) or 15 packs of 48 blocks (140mm). To check load sizes or request additional information, contact our brandonsales@lignacite.co.uk or call 01842 778484.

  • What is HVO, and how can it reduce carbon emissions?

    HVO (Hydrotreated Vegetable Oil) is a cleaner diesel alternative made from waste oils. When used for deliveries, it cuts CO₂ emissions by at least 90%.

  • Is movement control required?

    Vertical movement joints are advised every 6–7 metres, per Published Document 6697 guidelines.

  • Are there any design considerations for structural walls?

    Yes. Design should follow BS 8103-2, BS EN 1996-1-1, and the Building Regulations.

  • What mortar should I use?

    Use Designation (iii) / Class M4 mortar above ground. Stronger mixes may be needed below ground.

  • What is the life expectancy of sustainable concrete blocks?

    Like all masonry, 100+ years if built properly.