Expert installation of liquid screed in the UK
For flowing screed advice, contact Mark & Russell
07847 014311 / 07950 671276 | firstname.lastname@example.org
Click on the brochures below to download our Aftercare and Preparation Guides.
Links to EJS Floor Solutions Technical Reference Guides:
Drying Times / Force Drying
Following installation, flowing screed dries at a rate of 1mm per day up to 40mm and 0.5mm per day thereafter, as flowing screed can be installed thinner than sand cement this can allow for reduced drying times. The drying rate per day can be increased by good site management and use of force drying, refer to ‘Floor covering preparation and Drying’
Joints and Bay Sizes
Flowing screed has a smaller shrinkage profile than is associated with sand cement screeds, allowing for a reduction in expansion joints, this creates fewer weak points in the screed finish. Reducing the number of expansion joints having to be reflected in the floor finish will provide a more aesthetically pleasing appearance.
Unlike sand cement screeds flowing screed is 100% protein free, making it ideal for application in medical or other areas of hygienic importance as it cannot harbour bacteria.
Flowing screed is ideally suited to underfloor heating as it achieves full encapsulation of the heating conduit eliminating entrapped air and honeycombing, this provides a superior heat transfer between pipe and screed.
This combined with flowing screed’s higher thermal conductivity (2.2W/mk) and minimal pipe covering results in a greatly improved reaction time and reduced flow temperatures.
The diagram to the left shows the comparison between traditional screed and flowing screed.
Due to its fluid nature liquid screed is up to ten times quicker to install than sand cement screeds. Flowing screed greatly reduces the amount of manual labour required allowing up to 1500m2 to be installed in one day. Following installation, Flowing screed cures quickly giving sufficient strength to allow foot traffic after 24-48 hours, the floor can then be loaded after 7 days. Flowing screed forms a self curing membrane removing the need for polythene sheeting, eliminating curling and reducing shrinkage. Flowing screed is liquid in application and self compacting this results in a SR2 surface finish (BS8204) which can greatly eliminate the need for smoothing compounds prior to the application of some floor finishes.
The self compacting nature of flowing floor screeds coupled with the gypsum crystallisation process provides excellent compressive and flexural strength even at reduced screed thickness.
Flowing screeds are manufactured from a recycled calcium sulphate binder (a by-product of the production of Hydrofluoric acid), selected aggregates and additives to produce a free flowing self compacting screed manufactured to BSEN 13813:2002. Flowing screeds are designed to provide a level surface in both commercial and domestic buildings prior to the application of floor finishes. It can be used as a bonded, unbonded or floating construction, it is particularly suited to use with underfloor heating. Flowing screed is available in various mix designs and used as part of many building systems to offer specific solutions, for further advice on our screeds and building systems please contact us.