What is Liquid Screed?

Liquid screed, also known as flowing screed or self-leveling screed, is a modern alternative to traditional sand and cement screed. It is a fluid mixture of sand, cement, and water, supplemented with additives for improved flow and curing properties. The primary purpose of liquid screed is to provide a smooth and level surface for the installation of underfloor heating systems.

Advantages of Liquid Screed for Underfloor Heating:



Excellent Heat Conductivity:

Liquid screed has excellent heat conductivity properties, allowing for efficient heat transfer from the underfloor heating system to the living space. This ensures quicker and more even distribution of heat, resulting in improved energy efficiency and comfort.

Reduced Drying Time:

Compared to traditional screed, liquid screed has a significantly reduced drying time. It dries quickly and evenly, enabling faster progress in the construction or renovation process. With shorter drying times, homeowners can proceed with subsequent flooring installations or move into their newly heated spaces sooner.

Self-Leveling Properties:

As the name suggests, liquid screed has self-leveling properties, meaning it naturally flows and settles into a level surface. This eliminates the need for extensive manual leveling, resulting in a smoother and more even finish. The self-leveling nature of liquid screed ensures that the underfloor heating pipes are fully encased and in optimal contact with the screed, maximizing heat transfer.

Reduced Thickness:

Liquid screed can be applied at a reduced thickness compared to traditional screed. This thinner layer minimizes the impact on floor height, making it a suitable choice for both new builds and retrofit projects. It allows for a seamless integration with existing flooring structures and provides more design flexibility.

Improved Sound Insulation:

Liquid screed offers improved sound insulation properties, reducing noise transmission between floors. This is particularly beneficial for multi-storey buildings or properties with high sound sensitivity requirements, such as offices or residential complexes.

Installation Process of Liquid Screed:

The installation process of liquid screed for underfloor heating involves the following steps:


The substrate or floor surface is prepared by ensuring it is clean, level, and free from debris. Any necessary insulation or moisture barriers are installed at this stage.

Pipe Installation:

The underfloor heating pipes or conduits are placed according to the design layout, ensuring proper spacing and coverage for efficient heat distribution.


A primer is applied to the substrate to enhance adhesion and prevent any potential moisture absorption from the liquid screed.


The liquid screed is poured onto the prepared floor surface, taking care to achieve an even and consistent thickness.


The natural self-leveling properties of the liquid screed allow it to settle and spread evenly across the floor, encasing the underfloor heating pipes.


The liquid screed undergoes a curing and drying process, which typically takes a few days. It is important to follow the manufacturer’s guidelines regarding drying times and environmental conditions.

Benefits of Liquid Screed for Underfloor Heating:

Enhanced Efficiency:

The excellent heat conductivity of liquid screed ensures efficient heat transfer, resulting in lower energy consumption and reduced heating costs.

Recommended Screed Depths For Underfloor Heating
Underfloor heating brings its own set of challenges and considerations during the floor screeding process, mainly due to the heating pipes and cables which must be sufficiently covered. High-quality liquid screeds, however, such as Cemfloor, are specifically designed to be applied in very thin sections. We recommended between 40mm and 50mm in depth for an optimal installation. Please note that the diameter of the heating pipe is included in this depth. Liquid screed acts as a heat store with underfloor heating and will help the heat to be distributed evenly. The main thing to ensure is that all of the heating pipes are covered by the screed and also that there is enough depth to cover any services over the floor. For best practice, each screed installation should be considered a unique scenario. Consider the floor area to be covered, budget and any unevenness in the base layer of the flooring – for this reason, liquid screed thickness should carry a 10mm tolerance from case to case. Finally remember, that drying times will be affected by the floor screed depth, so it is worth taking this into account in your overall project timelines.

Liquid Floor Screeds

When it comes to constructing or renovating a building, achieving a smooth and level floor surface is crucial for both aesthetic appeal and practicality. In recent years, liquid floor screed has emerged as a popular choice for achieving flawless floor finishes. In this blog post, we will explore the concept of liquid floor screed, its benefits, the installation process, and why it has become a preferred solution for architects, builders, and homeowners seeking high-quality and durable flooring.

Traditional Screeds
Traditional screeds, also known as sand and cement screeds, have been used for generations to create level and stable floor surfaces. They consist of a mixture of sand, cement, and water, which is applied in a semi-liquid form and then compacted and leveled. Traditional screeds offer a cost-effective solution that provides strength, durability, and stability to the floor. They can be used in various applications, including residential, commercial, and industrial buildings. Traditional screeds allow for flexibility in thickness and can be adjusted to meet specific project requirements, making them a versatile choice for different flooring needs.

Underfloor Heating System: Efficient and Comfortable Heating for Your Home

In recent years, underfloor heating systems have gained popularity as a modern and efficient way to heat homes. This innovative heating solution offers numerous benefits over traditional heating methods, providing homeowners with enhanced comfort and energy efficiency.

Underfloor heating systems offer a modern and efficient way to heat your home. With their superior comfort, energy efficiency, and space-saving benefits, they are a popular choice for homeowners in the UK. Whether you opt for water-based or electric underfloor heating, you can enjoy a cozy and evenly heated living space with reduced energy consumption. Say goodbye to chilly floors and hello to the warmth and comfort of underfloor heating in your home.

Understanding Screed Underfloor Heating
Screed underfloor heating is a system that integrates underfloor heating pipes or cables within a layer of screed, creating a warm and comfortable environment. The screed acts as a thermal mass, efficiently distributing heat evenly throughout the floor surface and radiating it upwards. This type of heating system offers numerous advantages, including reduced energy consumption, improved heat distribution, and elimination of cold spots in rooms. Screed underfloor heating is compatible with various floor coverings, including tiles, laminate, and carpet, making it a versatile option for different interior designs.


Liquid screed is a highly advantageous choice for underfloor heating systems. Its excellent heat conductivity, reduced drying time, self-leveling properties, and improved sound insulation make it an ideal screed solution for maximizing the efficiency and comfort of underfloor heating. When considering underfloor heating installations, homeowners should prioritize the use of liquid screed to benefit from its numerous advantages. Enjoy efficient heating, reduced energy costs, and a comfortable living environment with the application of liquid screed for underfloor heating systems.

Installing flooring can be a long and difficult process.

It takes days to dry, sanding is required, and it’s hard to get the job done quickly. Plus, underfloor heating can add even more complexity.

Cemfloor is the perfect solution! This cement-based flowing screed can be walked on after 24-48 hours with 21 day drying times (depending on site conditions). There’s no need for sanding once installed, plus it’s suitable for underfloor heating – with force dry after 7 days using UFH and lay floor coverings after 14 days with the UHF commissioned. We also have specialised products for thin self levelling depths of 12mm so you can get your job done quickly and easily – we can lay up to 1200m2 a day!

Contact us now to learn more about Cemfloor!