Key Features & Benefits

• Thinner sections compared to traditional screeds.
• Minimal Drying Shrinkage (<0.05%)
• Larger floor area without joints (up to 150m² for unheated floors and 100m² for heated floors.)
• Foot traffic after 24–48 hours.
• Exceptional Thermal Conductivity.
• Can be applied in wet areas.
• Reduced drying times (Depending on drying conditions).
• Self compacting – no voids around under floor heating pipes.
• No risk of contamination at concrete mixing plants.
• No Surface Laitance (Dust) after curing.
• Easy Installation (Reduces time & costs).

Substrate

Cemfloor Therm Screed is designed for use as a bonded thick levelling screed on concrete, as a floating screed over thermal or acoustic insulation with a minimum compressive strength of 100kPa, or as an unbonded screed on top of a plastic membrane.

Mix Design

Trials should always be carried out to optimize the mix design before work commences. The sand used should be of an approved quality and grading. The screed is a blend of Cemfloor Binder, cement, sand & water. The mix proportions depend on the sand available.

Application

Cemfloor screeds should be used in accordance with BS 8204-7:2003 'Code of Practice for Pumpable Self-Smoothing Screeds'. To ensure a high quality screed it is recommended that application is carried out by a specialist screeding contractor who has been approved to place Cemfloor. The freshly poured screed will need to be levelled using a dappling bar, ensuring to dapple the surface in two passes at 90°. When cemfloor screed is installed as per installation guidelines in a sealed/weather tight area; it will not require any curing agent sprayed onto its surface. If the screed will be exposed to any wind/drafts or excessive sunlight then a suitable evaporation control spray (e.g. Cemfloor EC) may need to be sprayed onto the screed surface. Please contact our Technical Team for any further information.

Curing

After placing the floor should not be subjected to severe draughts, direct sunlight or heating for the first 24-48 hours. The room in which the screed has been placed should therefore be sealed during this time. The room should be ventilated after 24-48 hours by opening windows and doors during the day to aid the drying process.

Floor Coverings

Cemfloor Therm screed is compatible with all floor coverings, and all cementitious adhesives including fast track systems. The screeds moisture content should be measured before placing floor coverings to ensure that it is adequately dried. Cemfloor screed will not require any sanding to remove laitance. It is however recommended that the surface of the screed be lightly abraded to clean and remove any building residue to ensure that there is a good key to receive subsequent floor coverings.

Technical Information

Cemfloor Therm is produced in an ISO 9001 quality-controlled environment. Cemfloor Therm Screeds meet the requirements of EN 13813:2002 'Screed Material for Floor Screeds'.