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Liquid Screed Supplier South Wales

We currently supply liquid screed from the following batching plants at Penygroes, Carew, and Cardigan. We can deliver in our own fleet of truck mixers, operated by experienced staff.

Recognised for its thermal efficiency and superior finish, liquid screed has transformed the screed flooring market. Not only does it provide a smooth underlay for flooring finishes, but it also plays a vital role in enhancing the effectiveness of underfloor heating systems by ensuring optimal heat distribution.

Liquid screed’s rising popularity signals a shift towards more efficient, durable, and versatile flooring solutions that cater to the evolving needs and preferences of both builders and homeowners.

GD Harries are approved channel partners for Cemfloor, the high-performance, free-flowing, self-compacting liquid screed of choice for architects, specifiers and home builders.

Produced from our three manufacturing plants in West Wales (Bolton Hill, Cardigan & Penygroes) we offer an installation service to commercial builders, home owners, self build and regional property developers through a network of approved installers who have completed the required training.

Download Cemfloor Brochure

Three

liquid screed plants through South Wales.

BSI Kitemark

All plants are accredited to the highest standards.

Delivery

We have large fleet of 20 concrete transport trucks.

Cemfloor

We supply Cemfloor to licensed installers

Cemfloor Liquid Screed

Cemfloor is a high performance screed which complies with EN 13813. There are 3 different products available:

C20/F4 – for domestic / underfloor heating

C25/F5 – for commercial use

C30/F6 – for special uses

Cemfloor screeds are very responsive to underfloor heating. They can be laid in very thin sections and have a high thermal conductivity.

Since Cemfloor is a cement-based screed, floor coverings can be applied much faster than calcium sulphate screeds, which need to be dried to a final moisture content of 0.5%CM, which can delay floor finishings by months.

In addition, floor finishes can be applied once the screed has dried to a final moisture content of 2.5%CM, speeding up the entire build process.

Compared with other liquid screeds, which generally need to be force-dried with underfloor heating, Cemfloor screeds can be used in non-heated floors as they don’t require force drying to remove moisture. Using the correct tile adhesives, tiles can be placed in as little as 5 days on nonheated floors.

Advantages of using Cemfloor

Thinner sections can be used compared to traditional screeds. With Cemfloor only 25mm of screed is required above underfloor heating pipes.
Larger floor areas can be completed without the need for expansion joints (up to 150m2 for unheated floors and 100m2 for heated floors (Cemfloor Therm)).
Cemfloor has exceptional Thermal Conductivity.
Reduced drying times compared to other screeds. Moisture-sensitive floor coverings can be applied when the screed has dried to a moisture content of <2.5%CM.
Cemfloor is self-compacting, which means that there are no voids around underfloor heating pipes, enabling higher thermal conductivity.
Minimal drying shrinkage (<0.05%).
Foot traffic after 24 hours.
Can be applied in wet areas.
All floor coverings can be applied with no need for surface sanding.
Compared to traditional sand cement screed, floors can use more thermal insulation, which leads to a better U value for your building.
Can be forced dried after 7 days.
Compatible with all cement-based adhesives, including fast-track systems. No need to use surface primers or sealers before applying adhesives to the screed.
No surface laitance (dust) after curing.
Easy installation of up to 1,000m2 per day (reduces time & costs).
Lower running costs for underfloor heating systems when using Cemfloor. This is due to the exceptional thermal conductivity and the ability to lay thinner screeds over the underfloor heating pipes.

Cemfloor Liquid Screed : Underfloor heating guidelines

Cemfloor Therm screeds are cement based flowing screeds. Due to Cemfloors self-compacting properties it is ideally suited for use with underfloor heating systems. Cemfloor Therm screed totally encapsulates the underfloor heating pipework and eliminates air voids which ensures optimal heat transfer from the heating pipework to the screed surface. Cemfloor Therm screeds can also be installed at much thinner depths compared to traditional sand and cement which ensures ultimate controllability of the underfloor heating system.

Cemfloor Therm screed MUST only be installed in a totally weather tight environment, this means that the building must be constructed and all windows and doors in place.

Should windows or doors not be in place all apertures must be covered with polythene to create the required weather tightness.

Installation should be carried out by a specialist screeding contractor who has been approved to place Cemfloor. GD Harries work with approved installers and can put you in touch with suitable companies.

For heated screeds there must be a minimum of 25mm screed cover over the top of the underfloor heating pipes.

View the full guide in our brochure.

Cemfloor Liquid Screed : Tiling/floor covering guidelines

Cemfloor is a cementitious self-levelling flowing screed flooring system comprising a cement, fine aggregate, proprietary Cemfloor Binder, high-range water reducer, and water. GD Harries produce Cemfloor in our quality control approved and operated plants, and deliver to sites via our fleet of mixer trucks. We are able to recommend approved contractors who have been trained to lay Cemfloor flowing screed.

Cemfloor screed can be installed as bonded, unbonded or floating. It is also suitable for use with underfloor heating. For advice on specifications and for proprietary systems please contact us.

CURING AND DRYING OF CEMFLOOR SCREED

Once the screed has been placed and finished, the room needs to be sealed for a minimum of 24 hours in the summer, and up to 48 hours in the winter, until the initial hardening has completed. The screed will be ready for foot trafficking at this point.

After 24-48 hours, doors and windows should be opened to allow ventilation to assist in the drying process.

After 7-days the underfloor heating system can be commissioned. See the Cemfloor Underfloor Heating Guidelines above for the UFH commissioning process.

Where underfloor heating is used it must be commissioned and run prior to floor coverings, regardless of how dry the screed may be. This is in line with most floor covering manufacturer guidelines and industry standards. This process forces additional moisture from the screed, and conditions it to thermal movement prior to coverings being installed.

For moisture testing & preparation instructions read our full guide