How to Lay Underfloor Heating in a Screed 

I've watched your videos from underfloor heating to laying blocks and rendering, and all your videos have helped me greatly, there always highly informative and pick up on the points you really need to know. Keep up the great work and keep em coming.... 👍👍👍👍👍👍👍👍👍👍

Nicely explained It seems the technology is improving all the time , plus the ability to run under floor on the ground floor and radiators upstairs is a less invasive way to go thanks for the video 😃👍

Cheers Roger the younger ! ....very informative and reading through all the questions and your answers helps no end cheers 👍

Ahhh, nice to see a pre war Roger, reminds me of the good old days

Nice video Roger, great to see you looking better !!

Great job well done!

Your new skin care treatment is working amazingly well. You look 20yrs younger

That looks like a nice solid built manifold.

Brilliant install Roger. You make it look so easy!!!

Excellent video thank you.

This is the job that I love

Thanks so much. Great video. Just looking into doing it and your video gives me much more confidence.

Great job

Great video. I actually found it quite relaxing to watch. Cheers fellas. 😎

Great video.

Informativ video👍

Glad to see your son helping out

Very interesting video. We're in the process of finishing our ground floor renovation, tiler will be here in a couple of weeks. There's an existing screeded floor which was part of an accessible bathroom. We've had to remove the screed to get to the sub floor as the toilet & soil pipe is set in concrete 360mm from the wall ( doh!). Anyway, I only just found out about screed curing & drying times which would really drag out our project. Our plumber has suggested running flow and return to the towel rail in the floor as a pseudo wet underfloor system - just as you've suggested doing in another comment which I'm really keen to do, but. I'm looking for a quicker alternative to screed. Bathroom is tiny - 6ft square with a 900 Quadrant Shower tray so area is barely 2.5sqm. Tiler has suggested using 2 part latex, laid over a couple of days in two layers as an alternative e to the whole wait around for screed to cure & dry. Any idea if this would work as an alternative. Or is there another option? With such a small area the material cost is less of an issue, we're just looking for speed so we can be finished by Easter!

this man can do everything

Great overview. Just wanted to understand, in a Hydronic system, how component constitute to cost? For instance, how much % share does following components hold in a typical UFH system: 1. Manifolds and valves- 2. Zone Valves- 3. Thermostats and sensors- 4. Wiring center - 5. Heating pipes-

What steps do you take if you're going over floorboards?

Love your videos. What’s the make and model of those tiles you used?

Great job with the way the pipes are being layed. In a snail pattern instead of going across to one wall an back to the other wall like most fitters would do. Would using a liquid self leveling screed not be better for holding the heat an then realising the heat into the room than a sand cement screed?

Men like roger and robin make me proud to be British 🇬🇧 top blokes

Anyone know where to get the cover box he had for the system and controls?

Great video Roger. I read it's not good to add the pipes near walls or where heavy items will be placed, as the heat will/ maybe ruin the item e.g TV cabinet, sofa etc, what are your thoughts?

4:36 Roger tightens up the fittings on the fountain of youth. pmsl

I feel like I've gone through a wormhole to about 5 years ago!

We looked at a screeded system on an install we did 12 years ago when underfloor was still relatively new . On an existing slab it seemed a lot of work , plus the expensive preforms - we just didn't have the budget. We simply used 50mm extruded polystyrene over the whole ground floor slab , drew out the respective circuits onto the polystyrene and simply routed out the channels for the piping. The floor was covered in solid oak 3/4" flooring - the kitchen floor was covered in cement board and tiled with latex based adhesive. After 12 years the feedback has been entirely positive - no problems at all - maybe a screed would have been a more efficient heat store , but that weight of oak and the cement board and tiles have given a good return for the money , with a very economical energy use. It is sometimes too easy to be seduced by proprietary systems , when all that is needed is an application of existing, proven materials. After all we're not normally fitting out a tower block. Great videos .

Hi Roger I like the idea of using a dry screed in your video, although it may not be your preferred choice. What cement/sharp sand mix was used? We are just preparing our kitchen (23m2) for underfloor heating and I thought I’d get some quotes for a flow screed. £1400 & another at £2000. This is way over our budget. A dry screed would be so much cheaper. Any suggestions on cement type?

Great Tutorial really good video. Is it better to let the screed go off on its on or is this a usual procedure? Justin brickright 👍

Blimey... Is that Roger Junior?

I would strongly recommend using more insulation under the UFH. If I was building a new house I would use at least 100mm of PIR.

When is the best time of year to fit a system? Where can I find a decent installer? How much does a typical 5x5 installation cost on a new build? Cheers

I’ve opted for a milled concrete slab floor with 14mm wet system in conjunction with air source heat pump. The slab is insulated with 150mm celotex as well. We have only ran a thin flexible screed over the pipework and now it is to be tiled with a 10mm ceramic tile. Any advice on this system?

I didnt see the insulated mat that you used in the store link. Does it have foil under it? Could you use gypcrete with it or would it leak through?

Hi Roger, what matting system is this called? I used the red system matting (not insulated) a few weeks ago and my screed supplier refused to lay the screed floor over and we had to take it up and clip to the insulation (old school) prior to more DPM. Cheers

Hi Roger. Great video. I am just about to put a hot water underfloor heating system in a new 42 sqm extension. My wife wants a Karndean laminate floor. Would this be ok with the heating system? Karndean say as long as the surface temperature is no more than 27 degrees then should be ok but would appreciate your opinion. Cheers

Young Rog 👌🏼🏴󠁧󠁢󠁳󠁣󠁴󠁿👍🏼

Hello guys what product and brand was the panels, I've not been able to find it. I prefer the snail method of pipework.

Can you do your own liquid mix for this underfloor heating, 75m2 or is it too much, you need to get a supplier who pumps it in

What did he do that screed with, a tennis racquet?

Well explained Roger. Can you have an wet Electric underfloor system, just like boiler fed and how economical would it be?

What about wooden sprung floors, can you do a video on that please!!

Any recommendations Roger for an overlay UFH system on an un-insulated concrete slab (1950s semi). Struggling to find something that adds enough insulation without too much build-up as the ceilings are only 2.3m high. From drilling a hole it looks like there is only about 25mm screed on top of a 4" slab if that helps. Would prefer to avoid the cost of digging the whole slab up!

Another fantastic project & video.......If you ever got a job 30 miles surrounding MK please let me know, I would love to come and learn from you. 👍🏽

What was the diameter of the 200 mtr pipe , Joe

What was the depth of the screed?

Would you self level wooden floorboards before using these pipe pannels? I imagine my floor could be a couple inches off across the room but not measured and I'm unsure if uneven screed ontop of the pipe will be a problem. Could have hot and cold spots warming up but otherwise no problem?

Roger, are there any issues having the pump, isolating valves and manifolds on the first floor of the property and the boiler on the ground floor? I live in a 150 year old house with no ability to run the screed pipes through the house. The bathroom isn’t huge, approx. 3.5m x 3.5m. What’s your advice? I understand electric mats can be very expensive to run. Thanks, Rob

Roger What the best option where you have a original suspended timber floor an adjoining timber extension ? Both I suppose extension wise should I carry on with suspended floor or switch to ground bearing slab An then if keeping 2 system will the UFH working across 2 floor types ?

Does the screed install hold heat better than the warmboard installs, which basically have to run all the time to keep warm? Also, what temp does the screed need to maintain comfortable levels and how often do they cycle?

I’m pondering if I should go for this method griundfloor and upstairs use Infrared heating as the bedrooms are small. We will install a 3.5kwh solar system and battery. What do you guys think?

Yes keeping the pipes pressurised to a high level whilst the screed sets will mean that any future expansion due to pressure and heat will be accommodated without cracking the screed. I have to say that experiencing my friend's underfloor heating, the rooms feelcomfortable at lower temperatures e.g. 19c feels as warm as 21c in a room heated by a radiator. Thats because the heat rises evenly ftom floor level. There are no cold spots. As stated too the water temperature need only be around 25-35c compared with 55-65c in a radiator fed system. I would like to see how an installation is done in a wooden suspended floor.

Hi. Is it posible to heat shower floor? And all bathroom?

is the thickness of the insulation board thick enough? I thought it had to be idealy 100mm, minimum of 50mm

did floor heating can use standard boiler same for central heating

Insightful Roger. Why not anhydrite screed like Robin used?

Sorry to ask a stupid question with the screed taking 21 days to dry is there any way you can still live in the house or at least part of the house?

Here's the thing. I have a 1960 house with concrete floors. Do I dig up the floors and have to move out to gain better floor insulation without increasing the floor height (big cost with renting) or do I go for a retrofit and lose a couple pf inches of ceiling and door height - your thoughts please

One stupid question. Can the distributor be fitted in the room below the room where the floor heating is being installed? I plan to run one set of the pipes from ground level distributor to one circuit on the ground level and second set of pipes to first floor. Or is it better to have the distributor placed on the first floor? In that case I have a longer supply and return pipe... Thanks!

Great vid how far under cement should the pipes be?

👍

What's the minimum depth of screed you need over that type ?

How much depth would this add to my existing concrete floor?

Quick question. I'd like under floor heating but my budget is tight. Instead of a new expensive system, could I just get rid of my radiators on the wall and connect under floor heating pipes to the pies that my radiators were connected to?

Hi, nice to meet you. I come from a Chinese geothermal material manufacturer with stable quality and reasonable price. Looking forward to working with you. I mainly produce floor heating modules, staples, floor heating reflective films, etc., and look forward to cooperating with you

Why lot liquid screed ? It is much thinner, better heat conductivity plus easier installation and self leveling.

would it be better to use ready mix/mini mix screed with fibreglass in ,stronger + less likely to crack ? ( just a thought )

I'm here in Ireland with my 3 young kids I rent 3 bedrooms House House is so horrible cold 🥶 I keep tell the landlord about the house, cold but he doesn't care about it I had heater at house but not warm up house 😪

Could u please tell me what is the screed exactly and what is the material used ?? Because i use for covering the pipe in my country with Cement mix, which consists of sand, cement and water only. Is my method correct?! I hope you answer my question as soon as possible please

Re doing an old house , which in reality as we have replaced so much should have been demolished. Twin cascaded Heat pump going in. Ground floor, underfloor first and second floor radiators . Asked installer for 100 centres , however he reckons two issues with that , first radiators on the upper floors will need to much bigger and that they find the tightness of 100 spacing leads to more problems , as well as having to increase flow temperatures . Looking therefore at 150 centres . Does this sound reasonable ? I can see why there might be issues with 100 being so tight .

What was the screed mix?

Hi Roger, I was told by a plumber tht because I'm buying a 120+ year old small, 2 bed, 1 small bathroom mid terrace that needs new damp proof and gas bought into property from scratch that rads would be better than underfloor heating for the cos involved versus paybck in bill savings. Lounge and kitchen with concrete floor and master bed (wooden floor)are circa 11 x 10.5 ft, 2nd bed about 8x12 and bathroom (wooden floor) even smaller. Attatched sunroom/consevatory circa 8x6ft (needs renovation). Also, I saw in the electric ufh video you used a wet screed that dried faster. I'm confused. I'm on budget, but want to do the right thing long term as costs rise for upkeep. What say you?

Are you selling this new builders' manly man face rejuvenating cream?

We're having an extension to our kitchen, our house is 1910 construction and the kitchen floor is (currently) 22mm chipboard, 50mm polystyrene and then I'd say 4" or so of what seems like Limecrete(?). The Limecrete layer finishes about 3" below the outside floor level, would this be a suitable solution for UFH? As it looks to have an insulated backing, with a screed on top? Seen a lot of the UFH videos you have done and this one is I would say the closest to what I need!

I’m a bit confused to be honest. I seem to remember a vlog from you a while ago in which you completely rubbished underfloor heating. I think you said it wasn’t instant enough, didn’t warm up quickly enough, and didn’t cool down fast enough if it suddenly got too warm....! So which is it..? Are you for or against. What’s going on with you.

Great info Roger, but OMG! That screed finish was awful..! Time to get the levelling compound out!!

Rogers younger brother appearing again..

💙👊😎

I thought you did not like heat pumps ! !

Are these mud screeds new to the UK? Used alot in u.s

Hello boys

This sounds like a problem if you are getting it done when you are living in the house. Particularly if it’s for a kitchen.

Can you do one where the client wants to help . And explain why it's best not to let them . Also when they want to erect their make shift scaffolding and why that's never a good idea and why you should never let them order materials or basically do anything

Thought I had seen this before somewhere lol ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1BBqXQEIMNM.html 9 years in editing, every minute worth the wait!

great vid. good content. but please, does anyone wear masks on construction sites in UK. thaknks

Heat is heat, whether it comes from the underfloor or from wall mounted radiators is not much different. But if you get problems with underfloor then it will be difficult to fix. I think wall mounted radiators are a better engineering solution. Also radiator systems have stood the test of time . .

Top job with the heating but I could have laid that screed better with the back of a spade !

Some say under floor heating makes their feet ache

My Liz said hello Richard,so she did

also, if u r gonna use pipe dope, please dont get it inside the pipe. why, cuz now it mixes with the water and makes a sludge inside the circulation route.

Think maybe you need to find yourself a screeder. You won't get proper compaction using edges like that and the finish was terrible.

This must be a school. The walls look really ugly

Not so good with electric under floor heating. Very expensive to use. Not recommended!