It can be mixed in situ and poured using traditional cement mixers, a screed pump which requires feeding of the material to mix and pump to the desired area or batch mixed using a mobile unit which has the means to carry the material as well as mix and pump it.
It can be mixed up to 60m horizontally away from the site of pour and pumped along large bore pipes as well as vertically to many floors. At K J Plastering Ltd, we have our own mobile screed pump and can mix on site.
The application tends to be the same for most types of screed but normally falls into two categories in terms of materials:
Traditional Sand and Cement Screed
This is where the sand and cement is mixed and pumped onto the substrate and levelled to leave a smooth floor surface so as to lay the final finish. It can be laid as mixed but more often than not has polypropylene fibres added whilst mixing for structural reinforcement, lessening the effect of cracking upon the heating/cooling process and for the additional weight placed upon it. It can be laid in thicknesses varying from 25mm-150mm.
This screed can be used over underfloor heating and has a drying time of 72hours (where light foot traffic can be taken) and a curing time of 1 day per 1mm of thickness.
In areas where heavy traffic passes then other reinforcement like heavy gauge wire can be used and even chicken wire where necessary
Liquid & Flowscreed
Flowing screeds are made from inert fillers such as sand, with a binder system based on calcium sulphate. Consequently, they can look very similar to a sand/cement screed. Flow screeds are often preferred to traditional cement based screeds as they are faster to install because of its liquid properties and ease of spread and provide a similar finish.
Flow screed is most often used in combination with underfloor heating installation as the reduced thickness provides for more effective and efficient heat transfer. However, it must be recognised that flow screed is traditionally laid up to 50mm and if anything thicker is required then we would recommend sand/cement screed.
We are able to level floors that are uneven using a light liquid topping that can be smoothed in readiness for a final surface finish
We are accredited and approved installers of Ronacrete products. Products range from specific materials for the most arduous of projects to additives which speed up the drying times of screed
When you need to perfect flooring to accept whatever final finish you choose then don’t hesitate to contact us
For plastering advice call our technical team on 01553 767512
K J Plastering Ltd, a small enterprise located in Kings Lynn, has been servicing the plastering, drylining, screeding, rendering and partitioning sectors for over 18 years in Cambridgeshire, Lincolnshire, Leicestershire, Bedfordshire, Essex, London, Oxfordshire, Norfolk & Suffolk and in that time, have amassed a dedicated and qualified workforce with a wealth of knowledge and expertise.
Working with micro to macro size organisations and bringing ‘on-time, on budget’ solutions to their projects, K J Plastering Ltd has built an enviable reputation for quality service and timely completion.