Getting concrete smooth and flat is difficult and requires great skill. Self Levelling Concrete is a much easier way to create the desired finish.
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Don't be fooled, when we use the term Self Levelling Concrete what we really mean is that a highly fluid Self Levelling Mortar or Self Levelling Cement has been thinly applied to an already laid and cured concrete base.
Imagine you have a glass of water in your hand. If you slowly tip it from side to side the water will remain level. This is because water is very highly fluid.
Self Levelling Concrete also has high levels of fluidity which enable it to become perfectly level.
This high level of fluidity is achieved, not by making the mortar mix very wet, but by the addition of a chemical which decreases the viscosity of the cement ' a superfluidifier.
Normally the mortar is sold as a dry powder compound. One example of a Self Levelling Compound is the MAPEI Ultraplan Renovation Screed Fibre Reinforced Self Levelling Compound.
Why use Self Levelling Concrete
Self Levelling Concrete is usually used to make a pre-existing concrete floor perfectly flat and level.
Quite often concrete floors become damaged with heavy use. The surface can crack, crumble, delaminate and holes will appear over time.
A thin covering with Self Levelling Compound will strengthen the floor and make it ready for further treatment either by the addition of a covering like linoleum or tiles or treatment with the BECOSAN® Treatment.
Finishing for industrial floors. Resistant, durable and dustproof.
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Advantages of Self Levelling Concrete
There are many advantages of the use of Self Levelling Concrete, namely;
How to use Self Levelling Concrete
Self Levelling Concrete is incredibly easy use.
Firstly, make sure the concrete surface is clean, dry and free from as much dust as possible. Ideally, the floor will be coated with a primer (for example the MAPEI Eco Prim Grip) which will make sure the compound will have maximum adherence to the surface of the concrete.
Mix the Self Levelling Compound with clean water in accordance with the manufacturers instructions. Mix until the compound is smooth and free from lumps. It is at this stage that coloured dyes may be added to make the floor more attractive.
Self Levelling Concrete dries extremely quickly so keep stirring the mix until you are ready to pour.
Pour the mix evenly across the surface then, using a Gauge Rake, make sure that the entire floor area is covered and lump free.
Over the next 30 minutes the floor will level itself and begin to harden. Within 4 hours the floor will be ready to walk on.
Making Self Levelling Concrete durable and beautiful with Becosan
Once installed a Self Levelling Concrete floor will be more attractive and harder wearing than a traditional jointed concrete floor.
However, it is still just concrete and particles of concrete can disaggregate and become dust. Also, the surface can absorb liquid and can stain. Both of these problems can be eliminated through the use of the BECOSAN® SYSTEM.
The BECOSAN® SYSTEM begins by polishing the floor to give a gloss finish. Then the concrete Densifier BECOSAN® is applied to the floor. This binds the chemicals in the concrete to leave a harder surface which is resistant to wear and, hence, creates no dust.
After further polishing the concrete sealer BECOSAN® is applied. This makes the floor resistant to liquid spillage which is not absorbed and can be easily mopped up.
A Self Levelling concrete floor treated with the BECOSAN® industrial floor treatment will last for very many years and will give a surface comparable to any marble floor and at a fraction of the cost.
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When it comes to flooring projects, choosing the right surface preparation method is essential for achieving a level and durable foundation. Two popular options often used are screed and self-leveling compound. While both are designed to level surfaces, they have distinct characteristics and applications. In this blog post, we will delve into the differences between screed and self-leveling compound, helping you make an informed decision for your flooring project.
What is Screed?
Screed is a thin layer of cementitious material applied over a concrete or subfloor surface. Its primary purpose is to provide a level and smooth base for various flooring materials, such as tiles, wood, vinyl, or carpet. Screed can be made from traditional sand and cement mix or be an engineered self-leveling screed that contains specialized additives for improved flowability.
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Advantages of Screed:
Suitable for Large Areas: Screed is ideal for larger flooring projects as it can be applied in larger quantities efficiently.
Enhanced Durability: Screed provides a strong and stable base, enhancing the durability and longevity of the final floor.
Compatible with Underfloor Heating: Certain types of screed, such as self-leveling engineered screed, are compatible with underfloor heating systems.
Cost-Effective: Traditional sand and cement screed is a cost-effective solution for leveling floors.
What is Self-Leveling Compound?
Self-leveling compound, also known as self-leveling underlayment, is a specialized flooring material designed to create a smooth and level surface. It is a mixture of cement, aggregates, and other additives that automatically levels itself when poured, eliminating the need for extensive manual leveling.
Advantages of Self-Leveling Compound:
Rapid and Efficient Application: Self-leveling compound spreads evenly and quickly, reducing installation time and labor costs.
Excellent for Thin Layers: Self-leveling compound can be applied in thin layers, making it suitable for minor leveling adjustments.
Ideal for Small Areas: It is particularly useful for smaller flooring projects where the volume of screed may not be cost-effective.
Superior Self-Leveling Properties: Self-leveling compound can achieve a more precise level surface with minimal manual intervention.
Can also be used with underfloor heating systems
Differences between Screed and Self-Leveling Compound:
Application Method: Screed is typically applied manually and requires skilled labor to level and spread the mixture evenly. On the other hand, self-leveling compound is poured onto the surface and automatically levels itself.
Thickness: Screed is generally applied in thicker layers, ranging from 15mm to 75mm, depending on the type and application. Self-leveling compound is typically applied in thin layers, ranging from 2mm to 15mm.
Drying Time: Screed can take several days to dry and cure fully. In contrast, self-leveling compound dries relatively quickly, often within a few hours.
Area Coverage: Screed is more suitable for larger flooring projects, while self-leveling compound is more efficient for smaller areas or when thin leveling is required.
Conclusion
Choosing between screed and self-leveling compound depends on the specific requirements of your flooring project. Screed is a durable and cost-effective solution for larger areas, while self-leveling compound offers rapid application and precise leveling for smaller spaces. It's crucial to consider factors such as project size, leveling requirements, and drying time when making your decision.
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