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A Floor Screed Mix is a type of concrete flooring. This is the second layer of concrete that is added to concrete floors for protection of the base layer of concrete as well as to improve the look of the concrete floor. This can be a type of on-site flooring as well as a subfloor to prepare for other floorings such as carpeting, tiles, wood and more. A floor screed mix is a different standard concrete mix that is used in construction. These mixes do not have coarse aggregates as is common with concrete mixes. Floor screeds are usually made of a mix of cement and sand. Depending on the required floor screed mix, additives or fibres may be added to it too.

Floor screeds are of many types. The more common types of floor screeds are bonded screeds, unbonded screeds, floating screeds and liquid screeds. In this post, let us take a look at these floor screeds. Learning what they are, their differences and what type of uses they serve.

Taking A Look At Bonded Screed

Bonded screed is called such because it is typically bonded with the subfloor or substrate. This is done using primers or other bonding or mixing agents. This Floor Screed Mix Ratio is made with a mix of sand and cement. This is the right choice if you expect heavy traffic and the movement of heavy equipment on the surface. In general, the thickness of the laid floor is 25-40mm. Due is required when this floor is being laid to ensure that the bonding is strong. This will ensure the durability and stability of the floor screw. This type of Screed mix is often laid directly on the subfloor and allowed to dry. This is often used when a thin screed is needed or is sufficient.

Unbonded Floor Screed: What It Is

This is typically an unbonded floor which is laid over concrete base flooring or concrete slabs. It is typically laid on top of a certain type of damp-proof membrane known in short as DPM. The average thickness of this type of flooring is about 50mm. This is also made of a Floor Screed Mix Ratio of sand and cement. The damp-proof membrane protects the flooring from any dampness coming from the subflooring. This method is highly preferred as it prevents shrinking as it begins to dry and shrinking almost always leads to cracking. This is why this type of floor screeding is preferred by many. It will also help avoid the concrete base from settling due to weight.

What Floating Screed Is

This type of floor screed falls under the unbonded screeds. This is the method used when thermal or noise insulation is required. The screed is directly laid on top of the insulation that is needed to provide a level of thermal insulation. These floors are usually of a thickness of 65mm to 75mm. It is not always laid on top of the insulation, a damp-proof membrane is used to keep moisture problems at bay.

Understanding Liquid Screed

This is currently one of the most popular types of screeds in the market. This is because it is also a self-leveling screed. It is just poured and left to set. This type of concrete floor screed is made using smaller-sized or even less amount of aggregates. This ensures a liquid screed that can be poured and allowed to set. This also is known as a quick-drying floor screed. Flow screed or liquid screed will be ready in a matter of days as it is also applied in a much thinner layer as compared to other screeds.

Floor Screed Mix Ratios You Should Know About

Ratios are important for any type of concrete mix. It is the same for floor screeds too. Typical floor screed ratios are 1:3 up to 1:4:5 of cement to sand. To this standard mix, admixtures, additives as well as fibres are added to enhance its certain qualities. Using these additives, its drying speed and overall strength can be increased too.

Floor Screed Delivery and Ready Mix Floor Screed

Floor screed mixes such as the flowing screed or liquid screed do come premixed today. As they are self-levelling it is pumped directly to where it is required. It does not require any smoothening and will level itself. Such premixed and ready-to-apply floor screeds are also known as Ready Mix Floor screeds. These are mixed in batch plants according to the client or customer’s requirements. The ratios, additives and admixtures are created to the client’s preferences. It is also put through a slump test if need be. This helps ensure the clients that they will be receiving the exact product that they require. Ready Mix trucks will help keep the screeds fresh until it reaches the location and can be pumped directly.

Uses Of Floor Screeds

Floor screeds are highly useful in various settings. The raw and rustic look of concrete flooring is preferred by many. It can often be seen in markets, stores, restaurants and more. More than these places, it can be seen in workshops, garages and industrial places where one may not prefer to spend on flooring that will be damaged due to heavy wear and tear due to heavy machinery usage or movement. 

This type of concrete floor screed is durable and lasts a very long time. If you are unsure or undecided about what type of top flooring you would want for your project, you can always have it screened until you finalise on a flooring option. Many choose to paint over floor screeds to improve their look. Concrete floor screed is a great flooring choice on its own without needing a top floor layer. So if you are looking for a cost-effective and rustic floor that will last a long time while also maintaining its look then floor screeds are the right choice for you. Its biggest appeal is that it is low cost and low maintenance too. 

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