MartinGT

It seems to be connected fine. When I do overrun it, it does fire up and starts to warm up.

H10 is a 10mm Ø rebar. If they're giving you that information they should be at least supplying you with either a RC drawing or a Bar Schedule so you can give that information to a bar bender. It should take them 10 minutes to give you that information. It's straight forward. Although they have specified a B705 mesh. It should be B785 mesh! Have they specified which way the mesh is spanning? B mesh has a set of main bars (in this case 10mm Ø at 100mm centres) and distribution bars (in this case 8mmØ at 200mm centres). The main bars should span the way they've designed the span of the suspended slab for. Now it may be the case it's not critical but it's worth asking.

Get a proper SE to have a look on site.

Hi all We have had UFH installed in our new extension. After a few weeks of upping the temp and the manifold we still confused by the thermostat and it's workings. I have read the manual about 20 times, looked online and still confused. It's one room and not massive. Its approx 30m². So we have it on one zone. We haven't changed anything from the factory settings (apart from the date & time) and have set the comfort levels for through the week and then the weekend. All of that seems very straight forward. However, it doesn't come on when I would expect it to. E.g. On a weekend we have the following settings; Wake - 06:30 - 20° Leave - 10:00 - 17° Return - 15:00 - 20° Sleep - 20:00 - 16.5° So what I am reading in the manual (with factory settings) at 06:30 on Saturday morning it should wake up if below 19 degrees. If it hits 20 before 10:00 it will turn off. If not it turns off at 10am anyways if its 16 degrees? If not it aims to get to 16 before it turns off? At 15:00 if its less than 19 it comes on etc. as the morning cycle. Sunday it should do the same? So Sunday morning I should see it on and feel it on if it 17 degrees? As this morning I went in the room its in and it was 15ish degrees and it wasn't on. I don't have the hub so don't have the information on my phone, it's all done through the thermostat. I don't know if it's worth getting the hub? It's only one room.

A few questions for you; What's the thickness of your slab? What mesh are you using? Is it one top and one bottom? Is it two nested in the bottom? Where has your engineer said you need the links? I.e I am assuming at a support? Also hasn't your engineer given you these details? H10 links at 100mm centres is quite close spacings for links and would suggest very high shear forces. It just sounds OTT