Gypsol; Anhydrite binder for pumpable, self-smoothing floor screeds

LKAB Minerals’ Gypsol, the high-performance anhydrite binder, is a key component for the flooring industry. It is the primary ingredient in pumpable, self-smoothing floor screeds.

Your contact for:
Alan Jackson

Alan Jackson

National Commercial Manager Gypsol - UK & Ireland

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BBA approved Gypsol is used an environmentally friendly alternative to cement based screeds and can be used in a range of construction projects large or small. Building projects where Gypsol can prove beneficial include:

  • Schools
  • Nursing homes
  • Apartments
  • Community buildings
  • Retail
  • Houses
  • Refurbishments
  • Commercial projects

You will find case studies on the different projects in our DOCUMENTATION tab.

Where to buy Gypsol screed?

BBA approved Gypsol is available from more than 80 locations throughout the UK and Ireland. Our technical and specification experts cover the whole of the UK and Ireland and work with a range of quality assured manufacturing partners. The expertise available within the Gypsol team, combined with the manufacturing experience of our partners, means that we can offer an unbeatable package to meet all of your flowing screed requirements.

Our distribution network is continually growing to ensure easy availability of Gypsol screeds regardless of the size, nature and location of your project. Under the “WHERE TO BUY” tab, you will find an overview of most of the Gypsol suppliers.

Brands and manufacturers using Gypsol binder

There are several brands based on high-quality BBA approved Gypsol binder including:

Gypsol screeds are also readily available from several independent manufacturers. You can find an extensive list on the “where to buy” TAB.

Extensive Gypsol product range

BBA Approved Gypsol binder is the key component in all Gypsol free flowing self compacting floor screeds. Our technical experts have used this highly versatile and environmentally friendly material to develop a range of exclusive screed formats to suit every application. Each of these formats, including Gypsol Classic, our most widely used screed format and Gypsol Rapide screed, one of the fastest drying screeds of its type in the market, allow you to incorporate BBA approved Gypsol into just about any construction project.

  1. Rapide; A self-compacting, self-smoothing, fast-drying floor screed capable of drying in just 14 days from installation at 50mm depth
  2. Classic; Our general-purpose screeding system. The most commonly used material in our range and can be used in most applications
  3. HTC; Gypsol HTC (High Thermal Conductivity) specifically developed for use with underfloor heating and cooling systems as a high performance and thin screed system
  4. TS-15; An ultra-thin screed for bonded and un-bonded applications at a minimum depth of 15mm. Also perfect for use over low profile underfloor heating systems
  5. TS-20; A thin screed suitable for bonded and un-bonded applications down to a 20mm minimum depth.
  6. XS; Extra strength material for use in heavy-duty applications, where loading is likely to be higher than normal.
  7. TimBRE; Specially formulated and independently tested for use in timber frame and over timber supported floors including acoustic conditions.
  8. Summit; Formulated for pumping over very long distances or into very tall buildings of 10 stories and above.
  9. Modular; Designed for use in modular construction to allow early movement of units, also for a lightweight steel frame and Lewis Decking.
  10. Bagged Gypsol Screed; Pre-blended product supplied in 25kg bags for mixing on site. Ideal where minimal quantities are required, or access for ready-mix lorries is not possible.

Easy to place, Environmentally friendly, self-compacting, free-flowing screed

BBA Approved Gypsol is easily available from an extensive range of offsite and onsite mixing plants. Providing you with the many benefits including

reduced time and manpower on site reducing the cost of installation

Reduced manual handling using per mixed screed and protected pumping equipment reducing the health and safety impact on installers and lowering the risks to installers and sites.

No cement eliminating health risks associated with exposure to cement dust

Easy preparation, placement and finishing leading to better quality floors reducing the need for subsequent smoothing compounds

Fully self compacting requiring no secondary compaction leading to stronger and denser floor screed with much thinner depths

Very low embodied carbon reducing the environmental impact of the material

High thermal performance leading to high efficiency underfloor heating and cooling systems helping eliminate potential operational carbon emissions.


Easy to place, self-compacting, free-flowing anhydrite screed binder

An extensive range of offsite mixing plants uses our Gypsol. Providing you with the following benefits:

deliver the Gypsol screeds to site ready to uselabour intensive site mixing and associated mixing equipment
pumped directly to where they are neededmanual handling operations
pumped using equipment with closed or grilled dispensing hoppersrisk of contact with moving machinery
finished using a lightweight dappling barrequiring no secondary compaction most of the physical work needed to lay other screeds

This way of working significantly reduces the negative impact on the musculoskeletal system of installing contractors.

Sustainable Gypsol floor screed solution

As a company at the forefront of screed manufacture, we are ever conscious of the impact we and our customers have on the environment. We therefore continuously aim to reduce our carbon footprint and educate our customers and clients about how they can optimise their designs using Gypsol screeds and help minimise their environmental impact.

Gypsol screed provides benefits, including:

  • Low manufacturing carbon footprint
  • Low operating energy
  • Reduced lifetime impact
  • Low-temperature underfloor heating
  • Safer to work with
  • Low cost
  • Reduced waste
  • Low embodied energy

Due to the inherent properties of Gypsol Screed and its sustainable credentials, our material has been awarded Silver status by the Supply Chain School for Sustainability.

Low manufacturing carbon footprint

Our carbon footprint has been independently audited and certified, verifying that Gypsol Binder products just 120kg of carbon dioxide per 1 tonne of material manufactured. This compares favourably with cement manufacture, which exerts in the region of 900kg per 1 tonne of material produced.  You could, therefore, save up to 94% of the carbon emissions associated with the manufacture of your floor screed by switching from cement-based to Gypsol screed. Find out more in our carbon footprint guidance sheet.

Low operating energy

The more you reduce the energy used during the operational lifetime of a building, the lower the impact on the environment. Reducing your screed depth offers the opportunity to increase insulation depth. This enables the use of insulation systems which provide a lower GWP (Global Warming Potential) as well as reducing the heat loss through the floor, ensuring the building is as thermally efficient as possible.

Reduced lifetime impact

Gypsol screeds are 100% recyclable, which has a significant effect on the lifetime analysis of a building.

Low-temperature underfloor heating

When using underfloor heating, the key to efficiency is high thermal conductivity coupled with rapid response to changes in ambient conditions. Gypsol screeds offer thermal conductivity as high as 2.5 W/mK compared with 1:4 sand cement screed, which typically offers just 1.1W/mK.

This advantage, coupled with the thinner section, improves the floors ability to generate thermal inertia, increasing the coefficient of performance of the underfloor heating system by up to 25%. Altogether this results in much-reduced flow temperatures and corresponding energy savings.

Gypsol binder toxicology

Our LKAB Minerals’ Gypsol screeds emit no VOCs.

Gypsol origins

LKAB Minerals manufacture Gypsol binder from a by-product of the chemical industry. For every 1 tonne of Gypsol binder used 0.98 tonnes of landfill is avoided. Also, we are the only Anhydrite binder supplier with our own UK based manufacturing facility, ensuring control of the entire process and reducing the carbon footprint associated with transportation and logistics.

Safe to work with Gypsol screed

Gypsol binder does not contain Portland cement. Gypsol screed is supplied ready to use, significantly reducing the manual labour associated with other screed systems. Installation of Gypsol is carried out using specialist pumping equipment and does not require the installer to be on his hands and knees. Gypsol is fully self-compacting and therefore, reduces the negative on the musculoskeletal system of installers.

Low embodied energy

Unlike other binder systems, the manufacturing process for Gypsol binder requires no high-temperature production methods. This means that very little energy is used in the manufacture of our material. When incorporated into Gypsol Screed, it can also be used at much-reduced depths, requiring less material in the construction process. It also allows for more sustainable products to be used in conjunction with the screed, thus reducing the embodied energy of the building. For more information on optimising your design, contact your regional specifications manager.

Gypsol origin

We manufacture Gypsol anhydrite binder to UKCA/CE certified standards in the UK.  LKAB Minerals produce Gypsol binder from a by-product which we retrieve from the chemical industry. Previously this product was used as landfill.

Gypsol toxicology

A non-toxic, non-hazardous stable mineral. You can download the Safety Data Sheet from the documentation tab.

LKAB Minerals can provide support to assist with your Gypsol screed projects.

CPD’s and documentation

The internal support we offer consists of:

NBS Specifications

The Gypsol team can offer a comprehensive NBS Specification for your project. Contact your regional Technical Specification Manager for details.

BIM Modelling

Located with the NBS National BIM Library, BIM Modelling is a specification tool for designers. Our BIM Models are listed below:


The Royal Institute of British Architects (RIBA) provides support to Architects & designers:

For your convenience, we have a lot of background information available online about our entire Gypsol range.


We have several Gypsol related videos available to watch online.

General Gypsol videos

Product-related videos

  • Gypsol; What is Gypsol exactly? Where does it come from and what does it do?
  • Gypsol Complete; our first pre-blended composite screed binder. Gypsol complete offers flexibility and a cost-effective screed solution to the manufacturer whilst providing many other benefits.
  • Gypsol Diamond & Rustique; Gypsol screeds are available as finished flooring solutions, providing an aesthetically polished or rustic floor finish.

Application-related videos

  • Gypsol underfloor heating
  • Drying times of Gypsol; The drying times of Gypsol screeds are independently tested and can provide a finished floor solution in just 13 days.
  • Installing Gypsol Floor Screeds; Gypsol screeds provide a fast and efficient installation solution for any type of construction. This video provides an insight into the benefits of installing Gypsol screed in your commercial or domestic project

Online learning and CPD training

We regularly organize online webinars and training sessions which are recorded and made available to watch at your convenience. We advise you to check our online learning centre for the most up-to-date knowledge. This section of the website is set up in such a way that you will automatically receive a certificate after you have completed a session.

LKAB Minerals currently sells its Gypsol products in the UK only.

Sales points in the UK are:

North East England

Phone number
Breedon Group
Scarborough, Yorkshire
YO12 4HA
01723 369192
Breedon Group
Whitby, Yorkshire
YO22 4PU
01947 821921
Breedon Group Industries SH
Wath On Dearn, South Yorkshire
S63 7EF
01302 944066
S62 6EF
0345 155 6052
Breedon Group
Wetherby, West Yorkshire
LS23 7AX
0113 829 3006
Total Flooring Solutions
LS27 7WF
0345 956 9737
Castleford, West Yorkshire
WF10 2LA
0345 155 1811
0345 155 9268
0345 155 2427
Roydale (Aireflow)
0800 061 4455
Breedon Group
Grimsby, Lincolnshire
DN31 2SJ
01472 351987
Breedon Group
Bedlington, Northumberland
NE22 7AL
0191 615 3378
Breedon Group
Stockton, Teeside
TS18 3HF
0191 615 3378
Scrooby Top, Doncaster
DN10 6AY
01777 818203

North West England

Aggregate Industries SH
Chester, Cheshire
01524 736933
Eco Readymix
Ellesmere Port, Cheshire
CH65 4ET
01978 846976
Aggregate Industries SH
Wigan, Greater Manchester
01524 736933
Winsford, Cheshire
0345 155 9265

Eastern England

The Concrete Company
SG19 1QT
01733 270870
The Concrete Company
King’s Lynn
PE30 4NG
01733 270870
The Concrete Company
01522 692841
The Concrete Company
North Walsham
NR28 0AW
01733 270870
Breedon Group
West Deeping, Lincolnshire
01780 482000
Breedon Group
Norwich, Norfolk
01603 320068
Eastern Flowscreed
NR17 2EB
07508 767243


Breedon Group
Norton Disney (Newark), Lincolnshire
01780 482000
Breedon Group
Nottingham, Nottinghamshire
01332 694042
Mansfield, Nottinghamshire
NG18 4LP
01623 362699
Aggregate Industries SH
Mansfield, Nottinghamshire
NG21 0HJ
01636 554075
Ambermix Ltd
Ripley, Derbyshire
01773 748552
Derby, Derbyshire
DE21 7BR
0345 155 9206
Aggregate Industries SH
Stoke, Staffordshire
ST10 3EW
07717 690695
Aggregate Industries SH
Croft, Leicestershire
01455 288358
Loughborough, Leicestershire
LE11 5SR
0345 155 9206
Cannock, West Midlands
WS11 7XN
0345 155 1835
Sutton Coldfield, West Midlands
B75 5SZ
0345 155 1835
Coventry, Warwickshire
0345 155 1835

South East England

Aggregate Industries LH
Harlow, Essex
CM20 2EL
01268 561418
Lynderswood Farm, Essex
CM77 8JT
01621 874781
Aggregate Industries SH
Milton Keynes, Buckinghamshire
01908 668766
Breedon Group
Willington, Bedfordshire
MK41 0JF
01245 913063
Aggregate Industries SH
Peterborough, Cambridgeshire
01455 288222
Godalming, Surrey
01483 399007
Capital Concrete
Croydon, Surrey
020 3974 0520
Breedon Group
Northampton, Northamptonshire
01245 913063
Aggregate Industries LH
Eastleigh, Hampshire
SO50 6NZ
023 9266 2801
Breedon Group
Greenhithe, Kent
01245 913063
Breedon Group
Woodham, Oxfordshire
HP18 0QE
01245 913063
Ashford, Kent
TN27 0AN
01233 712295
Ipswich, Suffolk
01473 811900
Breedon Group
Newmarket, Suffolk
01245 913063
Capital Concrete
Romford, London
020 8599 3929
Dagenham, Greater London
0800 353433
Crawley, Greater London
RH10 9RE
0845 155 9229

South West England

Cheltenham, Gloucestershire
GL51 9AA
0345 155 9229
UK Screed
OX18 2QF
01865 660026
Notts Contracting
EX39 5AP
01237 421066
Southern Liquid Screed
0800 865 4888
Southern Screed
Guildford, Surrey
01483 662244
S Morris
Tout, Dorset
TA11 7AN
01458 223991
Aggregate Industries LH
Plymouth, Devon
01752 485201
Aggregate Industries LH
Exeter, Devon
01752 485201
Aggregate Industries LH
Newquay, Cornwall
01726 862251
Aggregate Industries LH
Redruth, Cornwall
TR15 3RN
01752 485201


Cloburn Quarry Ltd
Lanark, Lanarkshire
ML11 8SR
01555 807929
AB12 3LR
01224 876333
A N Fraser
By Spean Bridge, Inverness-shire
PH34 4EA
07778 103966


Origin NI Ltd
Londonderry, BT47 3PF
028 7181 0340
+353 1 404 1275
Roadstone EHF
+353 21 733 6336
+353 57 936 0578
(091) 709 050


Metsel Mortars
Perth, Australia
+61 8 9467 1891
Steypustodin EHF
Malarhofda 10, Iceland
+354 440 0400

Bagged Gypsol is even available as Sureflo, which is supplied by national merchant CCF in 25 kg bags for mixing on site.

In case you are not sure who to contact, please check with the responsible Gypsol Technical and Specifications Manager.

  • How thin can I lay Gypsol screeds?


    Bonded: 15 mm (TS-15)
    Unbonded: 15 mm (TS-15)
    Floating domestic: 35 mm
    Floating commercial: 40 mm
    With underfloor heating: 20 mm cover to pipes (HTC)

  • What is the benefit of using Gypsol screeds with underfloor heating?


    There are a few benefits of using Gypsol screeds with underfloor heating. The minimum cover to the heating element needs only to be 20mm using HTC screed, so the heat only has to travel through 20mm of floor screed before you start to feel the heat. Gypsol screeds are self-compacting making them denser compared to hand applied floor screeds. This means that the heat will travel through the screed more quickly. You install the screed in a very fluid state, intimately encapsulating the heating elements and drawing the heat from every surface.
    This means that the reaction times will be faster, reaching your desired temperature more quickly.
    The Gypsol team can offer you advice on bay sizes and the location of expansion joints; this is important where underfloor heating is employed.

  • What is the cost of using Gypsol screeds compared with other floor screeds?


    To gain an accurate comparison, measure the cost of installation per square metre of floor rather than the cost of material per tonne or metre cubed. Because you can lay Gypsol screed much thinner than conventional sand cement screeds more square metres of floor is covered. For example, a sand/cement floor screed without underfloor heating laid on insulation should be at least 65mm deep. In this example, it means that you can only cover 15 square metres with one cubic metre of material. However, the same floor laid using a Gypsol floor screed at 40mm deep would cover 25 square metres.
    This also allows the potential to change insulation types to more cost-effective options, offering significant cost savings for your floor.

  • Can I install tiles or vinyl onto Gypsol screeds?


    You can lay any floor covering onto Gypsol floor screeds, including carpets, tiles, vinyl, LVT and resin floor systems. As with all screeds, whether cementitious or Gypsol, will need to be properly prepared; clean, dry, mechanically abraded and primed.
    Best practice is quoted by the Contract Flooring Association in their guide to contract flooring.
    Also, any underfloor heating should be commissioned and run prior to installing floor finishes.

  • Can Gypsol screeds be used for outdoor use?


    We recommend that you use Gypsol screeds only in weather tight environments. The Gypsol team can offer you advice on all aspects of the floor installation, and can even draw up a floor specification which you can present to your contractor for tendering purposes. Just call us for professional advice.