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10-20mm LECA<sup>®</sup>LWA10-20mm LECA<sup>®</sup>LWA - Brick provided for scaleLECA<sup>®</sup>LWA utilised as greenhouse bench toppingExample of Green Roof - Toronto CanadaCharacteristic honeycomb structure and ceramic shell of LECA<sup>®</sup>LWALECA<sup>®</sup>LWA utilised as moisture retentive greenhouse bench toppingLECA<sup>®</sup>LWA utilised as a decorative topping - National Horticultural ShowGenuine LECA<sup>®</sup>LWA manufactured by LECA(Saint Gobain)LECA<sup>®</sup>LWA being delivered to our depot in Rugeley
Leca® LWA 10-20mm Lightweight Expanded Clay Aggregate
Product Code: 7892

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Price per pack£35.76£33.36£31.56Click to View
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LECA® LWA - The industry standard lightweight expanded clay aggregate in a 10 to 20mm grade. Delivered pre-packed to provide a lightweight horticultural substrate and construction infill in particular for situations where access is challenging or restricted.

Pack Volume: 50 ltrs (Approximately three times the volume of a pack of "normal" aggregates) Weight per pack approximately 15kg

Pack size: Approximately 800mm x 400mm x 150mm.

Granule Size: Approximately 10-20mm.

Density: LECA® LWA is a super-lightweight aggregate with a dry bulk density of approximately 280 kg/m3.

Water Saturated Density:
When saturated for at least 24 hours, 10-20mm LECA® LWA is likely to absorb approximately 30% by weight of water with a resultant bulk density in the order of 500kg/m3

Moisture Content:
This product is generally supplied dry, however, please inform our office if this is a specific requirement for your application

Genuine and original LECA® LWA distributed prepacked in the UK by Specialist Aggregates.

50ltr packs delivered by courier are offered for small projects, trial and research purposes.
Expanded clay granules are made by pelletising and firing selected clay in a rotary kiln at a very high temperature. As it is fired, the organic compounds in the clay vaporise forcing the pellets to expand and become honeycombed, while the outside surface of each granule fuses to give a ceramic shell. The resulting granules are lightweight, porous, and have good resistance to crushing.

Being a natural product expanded clay aggregate contains no harmful substances, it is inert with neutral pH, The granules are resistant to frost and chemicals, and will not break down in water. They are also non-combustible and have excellent sound and thermal insulation properties, further they can be used with cement to make a non-structural lightweight concrete suitable for fake rocks, theatre props and lightweight repairs.

Application & Use:
Top quality clean general purpose expanded lightweight clay with a minimum of fines,and backed by the worldwide LECA® brand.

The product is a dark grey/brown colour and offered for use in situations where aesthetics are not a prime consideration, in particular:

Horticulture: As a substrate in hydroponics, and blended with other growing media to improve drainage and provide insulation.

Green Roofs: The web contains advice on many and often contradictory methods for producing green roofs. Nevertheless 10-20mm Leca® LWA provides the definitive product for bottom and peripheral drainage. To create lightweight soils we would recommend 4-10mm grade Leca® LWA.

Backfill to structures: Especially for situations with restricted access for example the rear gardens and roof terraces to properties or shopping malls and for providing lightweight fill to planters.

Particle Size:
Sieve Size mm % Passing
20 100%
14 74%
10 17%
8.0 3%
0.25 1%
Chemical Composition:
Principal components typically:
Chloride 0.04%
Acid Soluable sulphate 0.5%

Compaction: Typically (above the water table) the product is likely to compact by 8-12% when poured loose from a pack to its final compacted state.

* Specialist Aggregates' Price Promise:
All prices shown include UK VAT and delivery to 90% of UK locations - Read More. - There are no hidden charges on checkout.

We export throughout Europe and Worldwide - please enquire for shipping rates.

Quick Contact:
WhatsApp your enquiry and images to 07484 022898

Rocks in a Box For protection and security your product will be shipped in a weatherproof pack within our easy-to-handle double walled cardboard box.

Boxes are delivered by national couriers. Please advise during checkout or contact our office if you have specific delivery requirements or concerns.

Both the inner plastic pack and the outer box can be recycled via normal household or industrial/commercial collections.

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Leca® LWA 10-20mm Lightweight Expanded Clay Aggregate
Leca® LWA 10-20mm Lightweight Expanded Clay Aggregate

Leca® LWA 10-20mm

Leca® LWA 10-20mm

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Leca® LWA 10-20mm Lightweight Expanded Clay Aggregate
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