Floor screed is usually associated with internal construction, where it provides a level base beneath the final floor covering. Outdoor flooring is different because the construction is exposed directly to the elements.
That means a standard screed intended for an internal room should not automatically be specified for a patio, terrace, balcony or walkway.
External exposure changes the requirements
An outdoor floor can be exposed to persistent moisture, frost, sunlight and substantial temperature fluctuations. These conditions need to be considered when selecting the flooring system.
There are specialist materials designed for external applications, but the correct choice depends on the location and how the finished surface will be used.
In some cases, concrete or another purpose designed external system may provide a more suitable solution.
Drainage should be part of the design
A good outdoor floor needs to manage water effectively.
Suitable falls can help rainwater drain away from the surface, while the underlying substrate needs to be stable and properly prepared. The drainage arrangement should be considered before the floor materials are selected.
This becomes particularly important if an external tiled finish is planned. The screed, adhesive, tiles and drainage design all need to work as one system.
Is liquid screed suitable for terraces?
Liquid flowing screed is predominantly used indoors. Its ability to create a smooth, level surface makes it useful for many residential and commercial floors, including those with underfloor heating.
That does not mean it should be used on an exposed terrace or patio. The specific manufacturer would need to confirm that the product has been designed for the proposed external conditions.
What should you consider before choosing a material?
Start with the intended use of the space. A covered area may have different requirements from a completely exposed patio, while a balcony may also be affected by structural and waterproofing considerations.
The substrate, drainage, exposure and final finish should all be assessed before deciding which material is appropriate.
For internal screeding requirements across Guildford, Woking, Epsom, Reigate, Redhill and surrounding areas, Floor Screeding Surrey offers a range of screeding services.
Contact the team for a fixed price quote for your project.