Screeding – is the levelling of a floor surface using sand and cement screeds, self levelling screeds, to latex or rapid setting screeds.
SAND & CEMENT SCREED
Traditional floor screed basically consists of sand & cement mixed at a ratio of between 3 to 5 parts sand & 1 part cement. In the majority of cases 4 to 1 is quite sufficient.
In the past reinforcement was achieved by using Hex wire (chicken wire) or D49 mesh. In the early 90’s Polypropylene Fibres (PPF) started to become very popular, and today PPF is the most common used reinforcement for traditional floor screed.
Traditional screed drying times vary according to the weather conditions, depth and manufacturers admixtures used.
WHY FLOW SCREEDING
Liquid screed, flow screed and flowing screeds are all names used to describe the new generation of pumped liquid screeds now available in the UK. There are many benefits to using flowing screeds for floor screeding as they provide a high quality, cost effective alternative to traditional sand and cement screeds.
FAST FLOOR SCREEDING
Flowing screeds are quick to lay. Approximately 100m2 can be laid in 25-35 minutes and as they have a high flexural strength can be laid much thinner. A 35mm floor screed will replace 75mm of sand and cement screed with an overall increase in strength.
Under Floor Heating
UNDER FLOOR HEATING
Flow Screeds are sometimes referred to as under floor heating screeds or screeds for under floor heating and this is where they really come into their own.
The increased strength means they can be laid at a much reduced thickness, typically 50mm. This, along with their increased thermal properties, means the floor heats u quickly – saving money for the customer on energy bills.
BETTER QUALITY FLOOR SCREEDS
Flowing screeds are laid using lasers and can easily achieve the standard SR2 under BS8204.
When compared to cement based screed, a flowing screed floor application has no curling edges, minimal shrinkage and a finished surface suitable for most floor coverings.
Insulation works as a barrier to heat transfer, helping to keep out unwanted heat in summer and preserving previous warmth in winter. In fact, a well insulated home can stop up to 70% of all heat flow through the ceilings, walls and floors. Even with air condition, insulation is indispensable, as chilled air is far more expensive than warmed air.