ChurchAl

This was the main consideration based off of what I have read and experience with projects in the past. Carbon/ natural use second. Not heard about the ethics of the PIR big firms but I imagine that'll be a thread of its own somewhere! Happy - just trying to get a feel/idea before I get quotes/spec. No, 2/3 of the area above the central area which is having the UFH is first floored. Understood, I assumed this is what was meant as opposed to leaving thicker WF protruding from the base of the joists - It will come down to space realistically (and the cost in part).

@ProDave@JohnMo@Redbeard@saveasteading: Thanks for the input. I agree more insulation would be better; we would look to add additional wood-fibre if possible however we don't know for certain joists depths across the whole area, we are yet to complete on property (exchanged so far) so can't go ripping the existing floor up to see. I'm basing the 140mm off of assumed depth from joists which I can see in a different room. I will certainly fill the space though if deeper! I have not heard/seen filling below the joists of a G-floor suspended floor before so not even considered that... I assume as long as clearance is good and vents are unobstructed, insulating deeper than joists is ok? @ProDave I have seen the spreader plates before... you reckon worth the money? Woodfibre insulation is internal for walls, hence part of the desire for UFH to avoid rad mounting faff in the open plan area! Vaulted area is 1/3 of the area - approx 25m2. @Redbeard Once we can get boards up and see the space ill know if underdrawing is an option, but thanks I had not even considered that! @saveasteading I am trying to avoid all PIR/non breathable options so looks like increased insulation between and below is the best COA. EPS isn't breathable from what I can see? What were thoughts on rest of the proposal? pipe sizing, loops etc?

Morning, we are looking at UFH for an open plan living space (Kitchen, living, diner) in a church we are renovating. Working out what system to use at the moment, given we are retrofitting the timber suspended floor with insulation, we reckon a structural deck with routed pipe grooves seems sensible. Covered with 6mm ply and to be finished with an engineered timber. Given the approx demand of 5kW, I am looking at 16mm pipes at 150mm spacings with 5 circuits to stay under the max 100m individual circuit length (1 zone though). I will attached a floor plan for awareness. Any comments/guidance on the above including proposed layout would be greatly appreciated. Other Spec: Area: ~75m2 Ceiling height: 3m majority. 25m2 has 6m ceiling height. Floor: Suspended Timber insulated with 140mm Steico Woodfibre. Walls: Solid stone, insulated 100mm Steico Woodfibre Glazing: Significantly large church windows however secondary glazing is being installed across all.