Martysmarty

Hi all, thanks for the posts. do i need to use a coupling mat when tiling onto this screed with the underfloor heating? The pipes are screed bedded, or can i just tile onto the screed with the correct tile adhesive? What are peoples thoughts on tiling up to the units? Just want to weigh up my options. Most tiles we picked out are 8 or 9mm, i definitly wont be going thicker. Thanks

Hi all. I have had some good help so far on this forum and i come with another issue to sort. We are going to have to put our kitchen units in before tiling the floor. For a couple reasons, one my partner cant decide what she wants till its all in (women). Also the screed floor is still curing, plus the time factor as im flat out. So, at the moment were looking at tiles, would i be right in thinking 15mm would be ideal builup for floor tiles? 10mm tile, 5mm bed of adhesive. Its screed and very level. And is there any membrain materials i need to account for? Proposed plans Option A, set the kitchen base units 15mm heigher on the legs, plus a 3mm tolerance gap and finish with sealer. So the legs would be 168mm, with a 150mm plinth. Option B, just tile up to plinths, keep units standard heights. All appliances are intergrated. My problem with option A, what if we get the buildup wrong. I can cut plinths on the lower units but not the end panels or the apliance housings. Also i cant lift up the legs after as the wall cupboards would be out of alignment. i will probably have my splashbacks tiled by then too. I prefer option B, but as its wet underfloor heating, the tiles will expand. What would be best to deal with that? Leave a 3mm gap and use sealer? Thanks Martin

Just reporting back to this. I set it up. Using a rad without a trv and all up and running. Got it increasing heat slowly. Thank you for all your help, hopefully no issues.

Hi nick Iv had a good think about this, and thankyou for the info on setting up a tank. the problem i have is i really dont have the space to put it I am now thinking of just keeping it simple and keeping the radiators 'always on' without a valve. And just use a 2 port valve on the ufh so i can run two stats. I have a rad without a trv on it so it would save the messing around. It was my original plan. What do you think?

Hi nick, so a bypass valve alone wouldnt cut it?

Cant say as i do, mostly its for commissioning and future maintenance really. Generally though theres not a lot of need, and if at all i think it would be the other way around.

Thank you Temp for picking up on that, i will have a read. I was hoping it wouldnt but all should be ok with thd bypass valve but i guess we will see.

I will get a picture up if needed, but its a grunfos pump with a reliance mixer, model UFHC980357 Its got a probe on the flow to switch the pump on if it dont fully close then were all good, should it close then the auto bypass thats already on my boiler will loop the circuit, correct me if im wrong but the boiler will detect minimal to no temp loss from the flow and return and just turn off anyway? Just trying to get my head around it. Thanks for your reply.

Hi all. Now i know i may be asking a daft question but here goes. I have got a single zone ufh manifold in my kitchen that i have got to comission. Its a reliance unit, rads all other rooms, on a combi boiler Now this mixer, does the flow from the boiler into the ufh loop ever shut off before the room stat? I see it has to maintain a much lower temperature on the wax stat thats built into the manifold. My concern is by running underfloor heating without the radiator zone active, the wax stat in in the manifold will shut off intermittently to regulate the input temperature from the flow. Or, does the manifold never turn off, but rather constantly run but at a reduced flow from the boiler, and mix in the cooler water thats in the loops? A bypass valve is there if anything went wrong as such, and once the room is up to temp i know it will turn it all off anyway. Its initial warmup im thinking The rads and ufh are seperated using two port valves and two room stats.