FAQ’s

These are the frequently asked questions:

What is flow screed?
Flow screed is a mixture of sharp sand and Gypsol with the end result being a smooth, flat finished floor that is 10 times stronger than traditional sand and cement screeds.
How can you compare flow screed to traditional sand and cement screeds?
Flow screeds are different from traditional sand and cement screeds because of its advantages such as self-leveling, fast-drying and more accurate than the traditional sand and cement screed.
Can flowing floor screed be used with underfloor heating?
Liquid flow screed is perfect and the most suitable type of floor screed for use with underfloor heating. In fact, it works great with UFH because of its high thermal conductivity.
Why is it important to lay a flowing floor screed?
It is important to lay a flowing floor screed because it’s the most suitable type of floor screed finish than anything else.
Is it possible to pour liquid flow screed straight onto concrete?
Yes, this is referred to as a bonded floor.
Can flow screed be poured onto a floating timber floor?
Yes, this is referred to as an un-bonded floor. In this case a 1200 gauge DPM must be installed prior to the flow screed being installed.
How do you level a flowing floor screed?
Usually, we use straight-edged wooden floats to level it by pulling the float across the surface but because of its self-leveling feature, most of the hard pushing and pulling is redundant from the installation process.
Can flowing floor screed be installed in any weather?
Yes, it can be installed in any weather, either wet or cold. But, we/you still need to follow some safety precautions to achieve great results. (Note: As long as the temperature is above 3°C)
What is an underfloor heating system?
An Underfloor heating system is a coil of plastic pipe installed underneath the flow screed whilst being clipped to the sub surface at approximately 150mm centres. The pipes are then connected to a manifold which is then connected to a heating system which will heat the water within the pipes.
What heat does UFH use?
Underfloor heating uses radiant heat different from the convectional heat used by traditional radiators. (Proceed to our underfloor heating’s section for further details)
What is a manifold?
A Manifold is the main source where the pipes are connected which is then connected directly to the heating system.
What is a zone?
A zone is place you desired to control its temperature using a thermostat. It is either a room or many rooms.
Can I use UFH if I still have an existing radiator?
Yes, but you have to isolate or separate the two systems by either a two-port zone valve or a diverting valve.
What is the required water temperature control in hydronic systems of UFH?
Usually, when you install an UFH system with a flow screed floor, it requires around 40 to 45°C as the average water temperature but if you use a traditional sand and cement screed floor, it requires around 50 to 55°C of average water temperature.
Can I control the temperature or the heat distribution by myself?
Yes, you can control it by yourself. UFH can meet your desired temperature and what is advantageous is that the pipes are in one manifold.
Is underfloor heating expensive to run in the UK?

NO, it’s very cost effective and efficient heating system. UFH becoming popular and often used for homes and buildings in the UK.

Are UFH systems efficient?
Underfloor heating systems work efficiently for they use radiant heat and can reduce heating cost because the floor’s temperature would be around 25 to 32°C.
Is underfloor heating a great choice for houses?
UFH works great, this system is perfectly compatible for houses with high ceilings because of its radiant heat that is evenly distributed giving you a thermal comfort unlike with radiators where in the ceiling is the warmest place that can also lead into increasing of heating costs.
Can you screed over electric underfloor heating?
Yes, it is possible to screed on electric underfloor heating systems. Get in touch for more information.
What is a laitance?
Laitance is a weak layer formed by a mixture of materials that could lead to possible failures if not removed.
Why is it important to remove laitance?
Laitance is an easy-to-collapse surface where in it cannot accommodate heavy works that is why it needs to be removed to avoid failures in applying the finishing materials.
How do you remove the laitance?
Usually, sand blasting the floor using an ideal 60 grit is the fast and efficient way in removing the laitance.
What can I do to know and test a laitance?
There is no difficult process in testing for laitance just scrape or scratch it and if there is a powdery white-like sand appears, that is the laitance.
Do you offer a service to remove laitance?
Yes, please get in touch for a chat
How much does liquid screed cost?
All depends on the m2 but a rough guide is between £20 to £30 per m2.
Building regulations floor insulation concrete
The depth of the floor insulation will differ in each county, but as a rule of thumb, 100mm should be sufficient.
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