Flow Screeding Specialists.  We cover the South East of England.

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Floor Screed Preparation

Floor-Screed-Preparation | underfloor heating preparation

Preparation For Floor Screeding

Floor screed preparation is the key to successful flow screed flooring and at Flow Screeding Services, we ensure that all our installations follow a proper procedure.


We make sure that the building envelope is weather tight, the roof and all external doors and window openings are fitted with their final fixtures or a weather proof fixing.

Exposed Edges

A temporary formwork is installed to door openings or changes in level, etc.


DPM - Isolation strip

Well taped joins in DPM. Isolation strip and well pinned heating pipes.

Install a polythene or similar separating membrane to the floor insulation or to the concrete substrate (depending on build type). Any joints are overlapped by a minimum of 100mm and joined with 50mm tape for the entire length of the joint.

Well taped joins in DPM. Isolation strip and well pinned heating pipes.

All Creases are stretched, being careful not to puncture the membrane - the floor screed should never be allowed to come into direct contact with foil covered insulation.

An 8 – 10mm isolation strip is also fitted at the wall-floor junctions and around any stairs, columns, pipe work etc.

Under-Floor Heating

Heating pipes or cables are securely fixed down with good quality clips pinned through the membrane. All warm water pipes are filled prior to application of the floor screed to minimise the risk of the pipes floating when the screed is being poured.

Application thickness Flowing screeds have a high flexural strength, which means they can be laid much thinner with an increase in overall strength. Piped under floor heating systems are usually laid to 50mm thickness.

Diagram of floor screeding

Cross-section diagram of
floor screeding

Under floor heating preperation

A Floor with underfloor heating
ready for flow screeding

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