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Hi all, I'm going to apologise in advance as I have limited technical knowledge on underfloor heating and general construction. I was hoping to get some advice on our wet underfloor heating installed 3 years ago. Its one system across multiple zones. It works really well in the new extension where we have concrete flooring with a microscreed finish. However in the old part of the house we have a room with a joist flooring and engineered wooden flooring and here the heating is never warming up the room. The floor boards are always cold and a thermometer in the never shows the temperature going up. I checked the in and out pipes on the manifold and all appear warm. I decided to rent a thermal image camera to see if I could spot any problems. All the pipes are appear to be working but the temperature readings are very small 21C compared to the new extension where we get 25C.. See attached photos I am wondering if this is a normal or expected output? We as a family freeze in the winter and never tend to stay in the room long because of the cold. I don't recall how the builder installed the pipes but I do remember some insulation went in first then the pipes and followes by the flooring. I assume this is OK? I'm wondering maybe the heat is getting lost by the fact we have an external solid wall so insulation in the room is clearly not as good as the new extension but I it does not explain why the floor is stone cold. Any advice? Ps I did spot the builder placed the pump in the wrong direction so the out flow is going through the in pipes and therefore the flows which are set to max do not register any flow. I'm having this fixed by a heating plumber so that might give us more control.

Hi All; We need to insulate the timber joist floor rooms which have curved bay window radiators as part of renovation. While looking for insulation boards, I came across these between joist UFH solutions: https://www.theunderfloorheatingsto...eating-for-between-joists-or-suspended-floors I would like to get your advice and opinions on: - the "spreader plate" and "foil board" solutions seems easier to install but I wonder how efficient they are as there is no "thermal storage" screed. - around 50% of the bedroom floor area is covered with king size bed and furniture so the open floor area is limited. Is this enough for the UFH efficiency? - shall I keep the bay window radiator as a back up on a separate zone? - I was told there are manifolds for central heating with radiator systems as well which makes zone control quite easy and efficient. Is it worth to change pipe works of the other rooms' radiators as well with centralised manifolds? Thanks for your helps