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Dear all, Is it common practice to use silicon to make a roof water-tight ? like in the photo below (around a velux): Thanks Bertrand

Hi There, I have a programer that is controlling HW or HW+CH. It was working fine until one day: the pump stays on all the time and I have to switch off the main to turn it off (switching the programer on OFF position is not switching off the pump as it used to do). I tried to follow the...

Hi There, My radiators are not very efficient and I suspect that the GCH system is full of sludge and/or air and need to be flushed and/or treated. The boiler is Ideal Mexico type and I have 2 cold-water tanks in the attic one for the hot water tank and another one for ... I thought the...