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LECA<sup>®</sup>LWA Insulation Fill - Prepacked in 50 ltr bagsLeca<sup>®</sup> Insulation fill placed as unopened bags under concrete floor slabGenuine LECA<sup>®</sup>LWA ProductLECA<sup>®</sup>LWA being delivered to our Midlands based depotProduct supplied securely wrapped on a pallet
Leca® LWA - Insulation Fill
Product Code: 7897

 12 Pack Pallet:   £228.60 Inc VAT and delivery* 
 20 Pack Pallet - One m3:   £296.04 Inc VAT and delivery* 
 30 Pack Pallet:   £358.56 Inc VAT and delivery* 



LECA® LWA Insulation Fill - Super-lightweight expanded clay aggregate formulated with a non-toxic water-repellent coating, specifically designed to help prevent moisture wicking under poured concrete slabs and construction voids. Delivered in 50ltr packs for ease on placement direct to application.

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

One bag will cover approximately 0.33 Sqm at 150mm depth. But why open the bags ? The insulation material and the bag can be laid direct into a floor. To finish the sub-base open a small number of bags to fill edges and voids and bring the surface up to the desired level .

A 20 pack pallet will cover approximately 7 sqm at 150mm depth. Note this will weigh just over 300kg kg compared to a similar volume of Type 1 coming in at nearly two tonnes !

Granule Size: Approx. 10-20mm.

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

This is a genuine and original premium quality LECA® Lightweight Expanded Clay Aggregate distributed prepacked in the UK by Specialist Aggregates.

This 10-20mm product has been formulated with a non-toxic water-repellent coating, specifically designed to help prevent wicking of moisture into the base layer under poured concrete slabs and internal construction voids.

Note: We most often hear the term "moisture wicking" in relation to sports and leisure clothing. Moisture wicking relies on "capillary action", which is the movement of a liquid through tiny spaces which is a useful property in fabrics for removing sweat and keeping us comfortable during exercise. However, the coating on LECA®LWA Insulation Fill works in the opposite way to fabrics and is designed prevent the movement of moisture.

Expanded clay granules are made by pelletising and firing selected clays in a rotary kiln at a very high temperature. As it is fired, the organic compounds in the clay burn off 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 a high 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. Leca®LWA has a Class 1 fire certificate together with excellent sound and thermal insulation properties.


Sub-Base to Building Extensions:
Leca®LWA Insulation Fill provides a quick and cost effective alternative to crushed Type 1 fill under extensions, conservatories, garages. patios and conservation projects. Additionally its convenient 50ltr packs weighing in at around 15kg are a boon when having to place bulk materials , "around the back" - "through the house" or "up steps".

Void Backfill:
A convenient and easy to place back-fill to construction voids in situations where consideration needs to be given to the potential for the movement of moisture causing damp within structures. Applications include back-filling redundant chimneys and ducting chambers.

Underfloor Refurbishment:
Insulation Fill is frequently used for refurbishment in pre WWII properties where colliery shale has been used as a sub-base under concrete floors leading to floor heave and structural damage.

Particle Size:
Sieve Size mm % Passing
20 100%
16 95%
10 35%
8.0 10%
5 7%
Sulphate Composition:
Principal constituents typically:
Water Soluble Suphate <450mg/litre SO4
Oxidisable Sulphides <0.3% SO4
Total Potential Sulphate <0.5% SO4
Design Sulphate Class
(BRE Special Digest 1)

Specify: Leca LWA Insulation Fill from Specialist Aggregates

Product Code: 7897

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