Bringing Stone to Life... Online Since 2000 And Now With Over 700 Products! Order Securely Online or Tel. 01889 580 660
Lytag Lightweight Floor and Roof ScreedLytag being packed at our depot in RugeleyLytag being packed at our depot in RugeleyLytag being packed at our depot in Rugeley
Lytag® 4-8mm No Fines Lightweight Floor & Roof Screed Basecoat
Product Code: 7831

 12 Pack Pallet:   £134.40 Inc VAT and delivery* 
 25 Pack Pallet:   £177.60 Inc VAT and delivery* 
 50 Pack Pallet:   £213.60 Inc VAT and delivery* 
 63 Pack Pallet:   £252.48 Inc VAT and delivery* 



Lytag® 4-8mm No Fines Lightweight Floor and Roof Screed Basecoat. Product contains a minimum of "fines", and is offered for the onsite production of lightweight screed prior to topping off with standard cement/sand.

Prices shown for 12 Pack Pallet (Approx 0.24m 3): 25 Pack Pallet (Approx 0.5m3) : 50 Pack Pallet (Approx 1m3) : 63 Pack Pallet (Approx 1.25m3)

Pack Size: 16kg (Approx 20ltr)

For larger volumes and bulk loads please contact our sales office on 01 889 580660 , email sales@specialistaggregates.com for pricing

Granule Size: Approximately 4-8mm

Density: LYTAG® is a lightweight aggregate with a bulk density at point of supply of approximately 810 kg/m3. (ie volume for volume Lytag ® Concrete Aggregate is approximately half the weight of "normal" limestone or gravel aggregate and requires approximately 81kg of material per m3 at 100mm depth)

Moisture Content: As supplied 4-8mm LYTAG ® is likely to contain a natural moisture content of approximately 15%.

Description & Application:
Lytag® is a sintered lightweight honeycomb aggregate that is resistant to frost and chemicals, and will not break down in water. It is also non-combustible and has excellent sound and thermal insulation properties.

This selected grading of Lytag® contains a minimum of "fines", and is offered for the onsite production of lightweight floor and roof screed basecoats.

Lytag® lightweight screed basecoat is required to be topped off with a standard cement/sand topping.

Principal Advantages of Lytag Lightweight Screed

Low Density - Approximately half the weight of a sand/cement screed, providing significant weight savings and ease of manual placement
Reduced Cost - Made with approximately half the cement of conventional sand screeds.
Quicker Drying Out - Free passage of air through the no fines structure ensures a quicker drying rate.
Low Shrinkage A Lytag® no fines basecoat exhibits low shrinkage ( 0.04%) therefore laying in bays is unnecessary.
Thermal Conductivity λ of Lytag® Lightweight Screed is between 3 to 4 times lower than conventional sand screed
Falls - Ideal material for constructing falls as there is no maximum depth to which it can be laid.

Design Considerations: Applicable to both Lytag® floor and roof screeds. For full details see Lytag® Technical Manual Section 7

Strength / Mix Design A 10:1 by volume 4-8mm Lytag:Cement (ie 8 x 16kg packs of lytag to 25kg of cement) can achieve a 6.0 N/mm2 compressive strength. When topped with the recommended 15mm of sand screed this can withstand the point loading associated with office equipment etc.

Minimum Recommended Thickness - BaseCoat:
When bonded to a hardened base - 25mm
Unbonded & Floating Screed - 50mm. Subject to insulation suppliers recommendations
Over and adjacent to secured pipes and conduits - 50mm

Maximum Recommended Thickness - Basecoat:
Unlike conventional concrete screeds there is no maximum thickness to which Lytag® No Fines Light Weight Screed Basecoat can be laid. However, at depths in excess of 100mm consideration may be given to utilising 8-14mm Lytag® for greater ease of mixing and placement.

Minimum Recommended Thickness Sand Screed Topping: 15mm

Lytag® no fines screed should be laid and tamped by hand - mechanical placement should not be used. The finished basecoat should be covered with sheeting to prevent drying out

The cement topping should be laid once the basecoat has sufficiently hardened to support foot traffic . Self leveling screeds should not be used as these will flow into the voids of the no fines basecoat

LYTAG ® lightweight screed aggregate is manufactured in the UK from reclaimed power station fuel ash (PFA).
Lytag® is made by pelletising and sintering pulverised fuel ash in a rotary kiln at a very high temperature. As it is fired, moisture in the pellets expands to produce a honeycombed core while the outside surface of each granule fuses to a ceramic shell. The resulting granules are lightweight, porous, and have a high resistance to crushing.

Environmental Considerations:
Lytag® is manufactured from former coal fired power station ash, hence allowing for land formerly used for landfill to be reinstated.
As Lytag is approximately 50% the weight of “normal”aggregate, twice the volume can be carried, reducing vehicle movements both on and off highway.

Particle Size:
Sieve Size mm % Passing
14 100%
10 87%
8.0 49%
4.0 4%
Physical Properties:
Moisture Content as delivered BS EN 1097-5:1999 15%
Aggregate Crushing Strength (BS EN 13055) 6.5 Nmm2
Bulk Density 820kg/m3
Permeability BS1377:Pt5 1999 1.3x10-1 m/s
Chemical Composition:
Principal components typically:
SiO2 53%
Al2O3 25%
Fe2O3 6%
CaO 4%
Los on Ignition 3.1%
Chloride 0.01%
Acid Soluable sulphate 0.1%

Would A Sample Help?
Request a sample to view colour and form
or send us an enquiry
Request A Sample or  Start An Enquiry
Order Online Now or Telephone Orders Welcome +44 (0)1889 580 660 - 9.00am to 5.00pm Monday / Friday
Buy Direct
Specialist Aggregates Ltd Shopping BasketBasket 
0 items
Sand, Gravel & Pebble Volume Calculator (For lightweight aggregates see individual products)
1. Simply select the shape closest to your requirement
Alternative Volumes 
Lytag® 4-8mm No Fines Lightweight Floor & Roof Screed Basecoat
Lytag® 4-8mm No Fines Lightweight Floor & Roof Screed Basecoat
1 Tonne Big Bag
Lytag® 4-8mm No Fines Lightweight Floor & Roof Screed Basecoat
Lytag® 4-8mm No Fines Lightweight Floor & Roof Screed Basecoat
Creative News

Visit to the spiritual home of all things Aqua.
Bridport Black Gravel
Product Key 
Individual Packs Individual Packs
Order and Deliver

See products for pack sizes.
Pallet Deliveries Multi Packs
Order and Deliver

Convieniently packed for ease of movement. See products for pack and pallet sizes.
Bulk Bag Deliveries Bulk Bags
Order and Deliver

Selected products available bulk packed for contractors. See products for specific informaiton.
Rockery Stone Deliveries Rockery Stone Deliveries
Order and Deliver

Caged stone delivery, packing may vary.
Bulk Loads Order For Collection
Order for collection from a warehouse. See products for pack sizes and collection details.
Top Products 
01.Leca® LWA 10-20mm Lightweight Expanded Clay Aggregate
02.Leca® LWA 4-10mm Lightweight Expanded Aggregate
03.LECA®LWA 10-16mm Lightweight Aggregate - Terracotta
04.Leca® LWA - Insulation Fill
05.Lytag® Geo fil 8-14mm Aggregate
06.Lytag® 4-8mm No Fines Lightweight Floor & Roof Screed Basecoat
07.Leca® LWA - Chimney and Flue Backfill
08.Lytag® 4-14mm for Lightweight Concrete
Our customers often viewed this product after searching for:
SEARCHClay Pebbles
SEARCHExpanded Clay Pellets Wholesale
SEARCHTerracotta Leca