FAQs

Underfloor Heating

 

How long does it take for underfloor heating to kick in?

It depends on your pipe distribution, heat source, and the room’s distance from the manifold. Flooring close to the manifold can feel warm within 30 minutes. Rooms further away can take up to an hour before it feels warm. A good system with the right thermostat settings or intelligent controls will allow you to pre-programme heat-up times to switch on beforehand, so that the property is at the required temperature. Intelligent controls use past history to build a pattern of your heating requirements, which also applies to cooling down periods.

 


Does underfloor heating work with biomass boilers?

Underfloor heating is compatible with biomass boiler systems. It is a very practical solution because underfloor heating can still operate efficiently at low water temperatures. Underfloor heating is also compatible with oil boilers, electric boilers, thermal solar and heat pumps.

 


Can I have underfloor heating if my floors are in place, but I want to do a refurbishment of my property?

Yes of course you can, we have systems that complement your refurbishment, our designers are experts in ensuring that you have the correct system for your property. You can even add to the system at a later date, by designing the correct system at the start, will save you money in the long term and fit in with your refurbishment budget over time.

 


Should I install underfloor heating? Can I fit it myself? 

Underfloor heating is a more sustainable way to heat properties and is very compatible with renewable heat sources. It is a significant investment, requiring careful consideration and the assistance of a quality underfloor heating engineer. Our experienced technical engineers know exactly how to install your pipework at the correct centres for your heat source. Balancing and pressure testing of your system before covering it with floor screed is extremely important. Costs that are cut in the preparation and installation of underfloor heating will be costly in the future if you have to take out the screed to correct a fault.

 


Can you install underfloor heating over suspended wooden flooring?

Yes you can. There are forms of underfloor heating to fit every type of floor construction (screeds, fully floating timber floors, battened, suspended and joisted floors), as well as floor constructions that incorporate acoustic components.

 


Can you install underfloor heating in properties with multiple floors?

Most definitely, we have several different setups that can be used depending on the floor’s structure. We can use multiple installation types in one property to accommodate different floor types as the building rises. Our underfloor heating consultants would be happy to talk through your options if you send your floor plans to sales@easyflow.org.uk.

 


Can you use a Nest system to control underfloor heating?

We supply Heatmiser Neo controls with all of our underfloor heating systems, which is compatible with Google Home and Alexa Smart Home. You have the option to add a neoHub gateway system to your package, which provides remote control of all neoStats and neoPlugs from your iOS, Android or Windows 10 device.

 


Are underfloor heating thermostats interchangeable?

If the thermostat is compatible with your heat source and manifold, then you can change it without having to change parts of your water underfloor heating system. If you are unsure, talk to us during your consultation, and we can discuss alternative thermostat options to the Heatmiser Neo.

 

 

Liquid Floor Screed

 

What is the thinnest liquid screed depth?

Depending on the type of liquid floor screed, it can be installed as thin as 12mm. For use with a water underfloor heating system, the depth of liquid screed should be around 30-50mm.  We typically install fully bonded screed at 25mm, contact with substrate at 30mm, over insulation/acoustic matting at 35-40mm.

 


How thick can liquid screed be?

Depending on the type of liquid floor screed and the intended application, liquid screed can be poured as thick as 80mm. Generally, liquid floor screed is poured in applications between 20-50mm. If you are using it to cover wet underfloor heating pipes for example, it would be poured the 30-50mm range.

 


 Are expansion joints necessary?

Up to 400m² can be laid without an expansion joint, though it is advisable to have a bay joint with compressible material in weak spots such as doorways.

 


How long should I wait before I can walk on the floor?

The screed can be walked on approximately 24 to 48 hours after the installation. The exact timing is dependent on site conditions and if a fast-drying screed mix was used. Sites that have cold and wet conditions may take longer to set.

 


How long before I can tile over screed?

Under like-for-like conditions, liquid screed approximately 1mm per day up to 40mm of thickness. This increases for screeds thicker than 40mm and in poor drying conditions. When the screed is dry the you can tile, but it is important to have all the moisture out of the screed as the tiles will not bond with the adhesive.

 


Is it true that I have to prime the screed before covering it?

Yes, if any adhesive is used for your selected choice of flooring, it is recommended to use an epoxy primer to create a barrier between any cement-based adhesive and the screed. Gypsum/anhydrite-based screeds produce laitance when curing and need to be sanded or scraped to key in the primer.

 


What depth do I need to leave for liquid screed over wet underfloor heating?

You need to leave at least 50mm depth we can also supply a thermally guaranteed screed called Thermio+ that can be laid at 40mm with minimal impact to the efficiency of the system.

 


When does liquid screed set?

In good site conditions, the floor sets between 24 to 48 hours. The screed must be completely dry before installing your final floor finishes. It will dry naturally at a rate of 1mm per day up to 40mm, any depth above this will dry at a rate of 0.5mm per day. For example, if your liquid screed was laid at 50mm it will be naturally dry in 60 days. If your liquid screed is laid over underfloor heating then you can start to force dry the screed 7 days following placement, we would then recommend a 3 week heating and cooling cycle to assist the drying process. We recommend you carry out a moisture test before applying your final floor finishes.

 


Where can you use liquid screed?

Liquid floor screed can be used in any indoor environment, domestic or commercial. Specialist floor screeds have been designed for use on suspended wooden floors. For outdoor applications, a weather-resistant cement-based screed should be used.

 


Can I screed a floor myself?

It is possible to screed a floor without professional assistance, but you are at risk of creating weak screeds at risk to cracking. If covering a water underfloor heating system, an incorrectly poured screed can significantly reduce efficiency. Furthermore, as liquid screed is a specialist product, you must be an approved installer before you can buy it.

 


Does EasyFlow supply and install liquid screed?

Our service is to supply, pump and install the liquid screed. We will also carry out a separate site survey before the pour to check access, floor preparation and levels required. Furthermore, we can carry out moisture testing and floor preparation services before you install floor finishes.

 


Does EasyFlow price per square metre for liquid screed?

We always price on a project by project basis, this is because the rate we buy the screed at changes depending on how close your project is to the nearest plant, we also price for the right amount of labour and how long you will need the pump for. For a no-obligation quote, all we require is the floor area and proposed depth of the liquid screed and the location of the project. 

 

Heat Pumps

 

Will a heat pump save money?

Heat pumps can reduce utility bills by hundreds of pounds when combined with underfloor heating and renewable energy generation. The true savings will depend on the price of electricity per kWh, and the efficiency of your heating system.

 


Which type of heat pump is the best?

Air source heat pumps can be mounted on walls if there is no ground space, and are generally cheaper. Ground source heat pumps are more expensive, but are better at extracting heat in cold temperatures.

 


Do you need planning permission for a heat pump in the UK?

Most heat pumps don’t need planning permission as you have permitted development rights at your property. Your local authority may have specific regulations you need to comply with, and it is best to contact them for guidance.

 


Do heat pumps work in cold weather?

Your heat pump can still power your water underfloor heating system in cold weather, though it will have to work harder. Ground source heat pumps are more efficient in cold weather conditions.

 


Are heat pumps efficient?

Heat pumps are very energy efficient compared to gas and electric boilers, biomass boilers, and solar thermal. Their cost efficiency depends on if you have a water underfloor heating system, insulation, and low electricity prices.

 


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