Floor Screeding: The Complete A to Z Guide on How to Screed a Floor

Preparing a Concrete Floor for Screeding

Preparation sets the basis for a successful installation and locks in the quality of the finished surface. Neglecting or rushing through the preparation stage can lead to unevenness, cracking, and poor adhesion of the screed. Take the time to thoroughly prepare the floor, and remove contaminants that could hinder proper bonding between the concrete screed or other substrate. This will yield superior results and minimise the risk of future problems.

Measuring the floor area

When questioning “how to prepare a floor for screeding?” This is where you start from. Calculate the dimensions of the space to determine the amount of screed required. Measuring the floor area allows for precise estimation of materials, so you have the right quantity of screed to achieve results. Having precise measurements also helps in planning the project’s logistics, including scheduling and budgeting.

Reinforcing or bonding the layer

If using an unbonded screed, reinforcing the layer with a steel mesh or fibres helps its strength and structural integrity. On the other hand, if opting for bonded screed, the underlying substrate needs to be prepared by exposing the aggregate and applying a bonding agent. Besides, this prevents delamination.

Ensuring a watertight site

Moreover, moisture can compromise the integrity of the screed, leading to issues such as warping, cracking, or mold growth. Address any potential sources of water infiltration, such as leaks or inadequate waterproofing measures, before proceeding with the screeding process. This may include:

• Conducting moisture tests
• Repairing leaks
• Also, apply appropriate waterproofing membranes or coatings to create a watertight environment.

Mixing screed for concrete floors

The process typically involves combining cement, sand, and water to create a workable mixture. In some cases, polypropylene fibres may be added to the mix to reduce the development of micro-cracks over time. Additionally, the proportions and consistency of the mix calls for careful attention, following manufacturer guidelines.

Step-by-Step Guide on How to Screed a Floor

Dividing the floor area

Dividing means a systematic approach and allows for better control over each section of the floor. You can focus on one section at a time. This might be the first thing anyone tells you on how to screed concrete or other surfaces.

Applying the first layer of screed

Once the floor area is divided, it’s time to apply the first layer of screed. This initial layer acts as a base for the subsequent layers and helps create a level surface. Further, the mixture is poured onto the prepared floor area and spread evenly using a screed board or a trowel. Workers should be diligent in achieving a consistent thickness and a smooth finish.

Levelling the floor with screed

Besides, use a straightedge or a screed bar to distribute the screed evenly across the concrete floor surface. Remove any excess screed by moving the straightedge in a back-and-forth motion, and you’ll fill low spots too. The goal is to achieve a flat, even surface.

There are two main types of screeds:

• Self-leveling

As the name suggests, they automatically level themselves, spreading out and filling in any low spots. They are generally easier to work with.

• Non-self-levelling:

They require manual levelling, as they do not flow and settle independently. They need more attention and skill to achieve a level surface.

Repeating the process for the entire floor

Treat each section as a separate entity, this is what all concrete screeding contractors would do. Now, it is crucial to maintain a uniform thickness and levelness across the entire floor to achieve a professional result. Taking the time and care to repeat the process for each section will contribute to a cohesive finished floor.

Floating the screed to remove imperfections

Floating would need to use a float or a trowel to smooth out any imperfections and create a refined finish. Moreover, the floating process helps to eliminate any ridges, bumps, or uneven areas that may have been left behind during the initial levelling stage.

Curing & Drying the Screeding On Concrete Floor

The curing period can vary depending on factors such as the type of screed used, ambient temperature, and humidity levels. Proper curing techniques are really important for the strength of the screeded floor. This means covering the screed with a protective layer, such as polythene sheeting or curing compounds, to prevent moisture loss.

While curing focuses on the chemical and physical changes occurring within the screed, drying refers to the evaporation of excess moisture from the surface. Further, this crucial step leads to avoiding moisture-related issues and preparing the floor for subsequent finishes.

Estimating the Cost of Screeding Concrete

• Keep the following factors in mind:
• Size of the floor area
• The type of screed being used
• The complexity of the project
• Any additional requirements

To obtain a quick quote for concrete screeding services, you can reach out to contractors or suppliers specialising in floor screeding. Also, many offer online quote request forms on their websites, making it convenient to submit your project details and receive a preliminary cost estimate.

Providing accurate information about the floor area, screed type, desired thickness, and any specific requirements will enable the professionals to provide a more precise quote.

Wrapping Up

Having the right professionals by your side can make all the difference. For further information, guidance, or to request a quote, reach out to Ready Mix Concrete London, the leading supplier in the industry. With our extensive expertise and top-quality products, we can provide valuable insights and support throughout your screeding project.

Moreover, we can answer any questions you may have, address your concerns, and provide you with accurate and personalized recommendations tailored to your unique project needs.