Turn To FeRFA For Questions On Resin Floors
Screed underlayments are frequently used as a cost-effective way to pre-level existing substrates before applying resin flooring systems.
These screeds usually fall into two main categories, those in accordance with BS 8204 Part 3 (2004): Polymer modified cementitious levelling screeds and wearing surfaces, and those in accordance with BS 8204 Part 7 (2003): Pumpable self smoothing screeds.
Both of these types of screed are deemed suitable to receive resin floor finishes.
In addition, screeds in accordance with BS 8204 Part 1 (2003): Concrete bases and cementitious levelling screeds to receive floorings may also be suitable to receive resin floor finishes as long as certain strength criteria are met.
Reference to the manufacturers’ recommendations would confirm suitability.
Before installing a flowable or trowel applied screed, a number of key factors should be determined in order to establish the most suitable specification.
Designers and manufacturers should be involved to ensure compatibility between the screed and the resin floor finish.
Key design criteria include the compressive strength, hardness, wear resistance, flexural and bond strengths of the chosen screed, all of which are influenced by its formulation and/or mix design.
For use with resin flooring systems, screeds should generally be bonded, although depending on the resin floor finish to be applied. But they may also be laid in unbonded or floating construction.
Again it is always recommended that the manufacturers’ advice is sought.
A useful source of information on the use of screeds as underlayment for resin flooring systems can be found in the FeRFA guidance note which is available to download from the FeRFA website:
The application of screeds and resin flooring systems is a specialist skill area.
FeRFA as the training provider for both the screeding and resin flooring sectors is able to provide a structured route to gain the NVQ Level 2.
In conjunction with CITB, a new screeding apprenticeship scheme has been developed to cover traditional screeds, calcium sulfate screeds, flowable polymer screeds, thermal/acoustic insulation and underfloor heating systems, in addition to the mandatory Health & Safety modules.
For CITB registered companies, the scheme for apprenticeships is fully grant funded. Further information on grants for screeding apprenticeships and registration:
Helen McGachie is ceo of FeRFA
This article has been reproduced from the Contract Flooring Journal. You can find them at www.contractflooringjournal.co.uk.