Where can Ecoscreed be used?

• As a topping over both electric and water under floor heating systems.
• As a levelling screed over existing concrete sub-floors.
• As a levelling screed over floor insulation.
• For sound & fire proofing applications over our Lewis® metal floor decking system.

Why is there a difference in depth of Ecoscreed poured compared to concrete and traditional sand and cement screeds?

The material used within our screeds are very different to those of traditional sand and cement screeds. The unique binding material we use is a higher strength, allowing for a thinner floor screed. Traditional screeds are generally bulked up to 75mm and may require the addition of fibres in an attempt to prevent cracking or shrinkage. Such problems are not encountered when using Ecoscreed.

My project calls for a 75mm sand and cement screed. Can I use Ecoscreed?

Yes. Dependant on the stage of the build, we can offer various solutions. The most straight forward way to accommodate a reduction in screed depth is to increase the depth of the insulation being installed. Our Ecoscreed Gridboard is a cost effective way of achieving this.

Does Ecoscreed require reinforcement?

No. Our screed is self-compacting and forms a dense screed that does not require the addition of reinforcement.

What is the maximum bay size and will it require joints?

• The maximum bay size when incorporating under floor heating is 300m2 although an expansion joint should be installed between independent heating circuits.

• The maximum bay size without under floor heating is 1000 m2.

• Joints are required where the length to width ratio is less than 6:1 or where continuous areas exceed 40m in length.

Note: As with all floors continue all construction joints through the screed.

At what stage of construction is the screed installed?

It is possible to install Ecoscreed at any stage of the construction after your building is wind and water tight. It is possible to leave the installation of the floor screed until after your walls and ceilings have been plastered.

Is Ecoscreed suitable for all floor finishes?

• Yes Ecoscreed is suitable for all floor finishes including ceramic and porcelain tiles, linoleum, carpets, laminate, wooden and engineered floor etc.

What finish will I get using Ecoscreed?

Ecoscreed will easily achieve an SR2 floor finish with tolerances as classified by BS 8204. This floor is ideally suited for the installation of floor tiles, all types of timber flooring, carpets and other standard domestic floor finishes. Highly specialised floors such as linoleum or vinyl that require an SR1 class floor will require additional preparation. The screed can be lightly sanded after 24 hours to achieve this.

Can Ecoscreed be used in timber frame houses?

Ecoscreed is perfectly suited for installation on both ground and first floors of timber frame houses. You may wish to consider our Lewis® metal decking system on upper floors for its sound and fire proofing qualities.

Can Ecoscreed be used in wet rooms?

Ecoscreed can be installed into wet rooms as long as it is fully dried before a DPM is installed to seal the screed fully before the installation of the floor tiles.

Can I use Ecoscreed in my garage?

Yes. We recommend the installation of a 50mm screed in areas with heavy traffic. Once dry, the screed will need to be painted with an appropriate floor paint, or tiled.

Can Ecoscreed be polished and left as a finished floor ?

Yes. Please contact us for further information.

Can Ecoscreed be used outside?

Ecoscreed is generally recommended for internal use only.

How long will my pour take?

Most domestic installations are completed in a few hours and generally the floor can take light traffic the following day.

What is the minimum depth you can pour Ecoscreed?

Ecoscreed can be poured:-

Unbonded:- 30mm deep over 500 gauge polythene.

• Minimum thickness of 30mm.

• Fix 10mm border edging strip to all walls.

• Use lapped single sheet polythene not less than 500 gauge.

• Use unfolded polythene on rolls (folds act as crack inducers).

• Tape all overlapped polythene edges except at border edge.

Floating:- 40mm deep over insulation and 500 gauge polythene.

• Minimum thickness of 40mm.

• Polythene to be placed on top of insulation.

• Insulation to be laid in accordance with the manufacturer’s recommendations.

Under floor heating system:- 30mm minimum cover over the top of the under floor heating pipes.

• Heating pipes should be fully secured to prevent lifting.

• Heating pipes, as a general rule, should be pressure tested and water filled prior to screeding taking place.

When using Ecoscreed as a thin, levelling screed, why is a primer or polythene needed?

Preparation of the sub-floor is required to de-bond the screed from existing, generally cement based sub-floors. Direct contact with cementitious floors can cause the cracking in the sub-floor to carry through to the screed, therefore it is best practice to de-bond the screed.

What is the strength of Ecoscreed?

It has a compressive strength of 10N/mm2 at 1 day and >20N/mm2 at 28 days.

It has a flexural strength of 3N/mm2 at 1 day and 6N/mm2 at 28 days.

What is a typical ground floor build-up ?

The typical floor build-up is insulation over a concrete floor slab with a 500 gauge polythene membrane, a 10mm expansion strip is installed around the perimeter of each room on both internal and external walls and around any columns. If using under floor heating, the pipes are then clipped to this.

If using the Osma pocketed under floor heating system or our Ecoscreed Gridboard Insulation, then no polythene membrane is required but the insulation sheet joints will need to be taped. This is then covered with Ecoscreed. Please see our floor preparation information.

When can I walk on the floor after the pour ?

The floor can generally lightly trafficked the day after the screed is poured so on site work can continue.

Why is polythene needed over the insulation?

We generally require a 500 gauge polythene membrane to be laid over insulation sheets to help contain the screed and prevent it from getting under the insulation. Also most manufacturers of high density insulation generally recommend this. If using the Osma pocketed under floor heating system, polythene is not generally required. (See our floor preparation information).

If using Ecoscreed Grid Board Insulation the membrane covering the sheet has overlaps that allow them to be taped to the adjoining sheet. There is therefore no need to use polythene when using this insulation.

How long does Ecoscreed take to dry ?

The actual drying time will depend on a number of factors:-

• External weather conditions.

• If there is under floor heating in the floor and whether you are able to commission it.

• Internal building temperature.
As a rule of thumb under normal drying conditions (with no heat) our screed will dry at a rate of 1mm per day at a room temperature of 20°c. This however can be sped up by turning on the under floor heating system 7 days after the screed has been poured, or with the use of an external heating source or dehumidifiers.

How long until I can lay timber floor or floor tiles over Ecoscreed?

Final floor finishes should not be installed until the floor is fully dry. The following should be checked before the finishes are laid:-

• The under floor heating has been turned on and run through at least one heating and cooling cycle.

• A moisture reading taken on the floor to ensure the correct level has been achieved for the specific floor finish.

• If you are adhering any floor finish directly to our Alpha Hemihydrate floor screed you should contact your adhesive supplier/manufacturer who will be able to recommend suitable products to use. Most adhesive manufacturers will recommend that your floor screed should be sealed before the application of any subsequent adhesive.

PVA primers are not suitable for use with under floor heating or our screed.

How do I prepare the floor for Ecoscreed?

• Existing concrete floor. You will need to lay a 500 gauge polythene membrane over your existing concrete floor. This membrane will need to be lapped 150mm up the perimeter walls and all joints will need to be taped. This is to stop air leakage out of the concrete slab which would contaminate the surface finish. You will also need to seal any protrusions through your concrete slab and install a 10mm foam expansion strip around the perimeter of each room on both internal and external walls and around any columns.

• Existing/new insulation. If you are using a foil faced polyurethane foam insulation board (like Kingspan) you will need to lay a polythene membrane and foam expansion strips as above. If you are using Ecoscreed Gridboard or the Osma pocketed under floor heating insulation board, you can omit the 500 gauge polythene and just the sheet joints will need to be taped.

It is important that all debris be removed from the floor prior to the screeding process as this will contaminate the floor or may float and contaminate the surface finish. Vacuum clean if necessary.

(No other trades will be able to work on, or traffic over the floors during the screeding process.)


Further details can be found on our floor and site preparation leaflet

How do I prepare the site for Ecoscreed?

We will require a continuous strong water supply on site on the day of the pour. We will require a suitable hard standing area for our delivery trucks and pumping equipment.

What is the lead time for ordering Ecoscreed?

Please contact us. We will always try to fit in with your requirements.

How can I organise a site visit?

Please contact us to organise a site visit.

Andy Allen: Tel: 07781 457217

Jay Newsom: Tel: 07781 124185

How do I obtain a quotation?

All we will require is details of your site including location, area/size in m2 and the depth of the screed you require. We are also able to receive plans by post or email.