Flooring Screeds

Milestone Flooring provide screeds for projects and assist in evaluating your needs in respect to purpose of use and finish as various options are available.  A floor screed is a cementitious or gypsum-based material, either ready-mixed or mixed on site. If reinforcement is required fine metal or polypropylene mesh fibres may be added to the mix.

Screed may be applied bonded to a mechanically prepared substrate using suitable primers, unbonded onto a suitable damp-proof membrane or floated onto insulation material. The screed may be the floor finish (wearing screed) or may provide a surface for a specified flooring finish.  We are happy to discuss the different types of flooring options depending on your company’s needs.

Pumpable flowing screeds, or self-levelling screeds, allow for a very level finish, are quick to apply and can be suitable to use with underflooring heating systems.

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Choices to Consider

The depth and type of screed, the construction tolerances, and the provision of falls are all important design considerations for a successful installation.  Milestone are experienced in assessing existing substrates and promote awareness regarding cure times and drying out moisture in screed.  This may be important if the project requires a short programme to reduce the impact of closure of business.

The purpose of the floor and type of traffic upon it will influence choices such as slip, abrasion, and impact resistance, appearance and maintenance, and location of movement joints.

Levels and flatness are important when designing falls for effective drainage or access ramps.  Milestone Flooring are a one stop shop that can supply a quality turnkey service which cover the entire needs of a flooring installation project.

Technical Aspects when Considering Design

Thickness

Application recommendations are a minimum thickness of 5mm if bonded, 30mm if unbonded, or 35mm if a floating finish is required depending on material usage. Bonded screeds should therefore be thin, normally less than 50mm. Unbonded screeds should be thick, normally 70mm or more, and 100mm or more if curling must be avoided.

Curing Times

BS 8203 estimates the drying time for a sand cement screed as one day for each millimetre of screed thickness up to 50mm thick.  This is dependent on the environment, warm and well-ventilated drying conditions are favourable, with thicker substrates or cold temperatures requiring additional time.

Joints

A screed joint must be formed above all structural movement joints, for heated screeds it is important to remember to place joints at door thresholds, to avoid thermal movement cracking.

Screed Failure

The bond between the screed and substrate may fail if the screed is too thick, or an unbonded screed may fail if it is too thin.  Screeds may lift or curl caused by differential shrinkage, un-bond, or fail to prevent disproportionate collapse and the development of composite action with the concrete slab below.

It is important that your investment is beneficial to your business in that the flooring you chose is what your business will stand on.  There is no room for error, flooring being fit for purpose and technically sound is vital which is why Milestone Flooring are proud to be a trusted name in our industry to provide a quality seamless service.

Wow-factor flooring

Decorative flooring has come a long way since we began our careers 30-years ago. Quartz and Terrazzo are the ultimate in luxury, while resin flooring comes in the entire spectrum of colours, to showcase your brand and uplift any area.

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