mdproctor

To be fair the builders work so far has been top notch. I think the problem is that they refer to Florad, who they consider the universal truth on the matter. This caused the conflict with plumber pressure test (see other post) and the plumber. The parties agreed to disagree and the plumber can leave the system pressurised. However during this process I learnt a hell a lot about UFH, materials, layouts, installations etc. And now a little konwledge has become a dangerous thing. As the Florad design differs from what I've read about best practice, where you try to get the most amount of hot wat

The plumbers answer was that the pipe is cold and will expand when heat is put through it, but keeping it pressurised you ensure expansion room. The builders use Florad and Florad advised them that this wasn't necessary. So a bit of a "****ing contest" happened between the two parties and the plumber walked off the job. I then did my own research and saw that many companies (polypipe, jg) do recommend to keep the system pressured through during, as the plumber said. I've since persuaded the plumber to come back onsite, the compromise being the system remains pressurised as long as he feels fit

builders are about to fit my UFH and have provided the layout found below from their designers. The floor area is about 36M2: I added the external doors, and external walls text and lines myself - sorry for sketchyness. I've done a fair bit of research on UFH and layouts and this one seems sub-optimal. It uses a single serpentine to cover the entire room. My understanding is that the design should try to ensure the pipes run along external walls and windows. Essentially the hottest part of the pipes I beleive need to be by the bi-folding doors (u-value 1.6) I would have expected double serpen

Polypipe, JG and others state you must keep the system pressurised throughout the screed drying period. Others, such as Florad, state that pressure only needs to be maintained until the screed is laid, and that it does not need to be mainted for screed drying period (3 to 21 days, depending on the screed). Who is right, and why? Mark