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Hi I wish to insulate my loft floor and partially board it. At present it has a measly 50mm of insulation. The joists are 90mm deep and I plan to raise the joists to 180mm in the area I plan to board by fixing another 90mm deep beam ontop of the exiting joist. My question is... Do I need an...

Ferroli Optima 901 -occasional Hot water problem? Hi I have a Ferroli Optima 901 combi boiler and have recently been experiencing occasional problems with no hot water. This has been noticed when running the bath, with it initially running warm and then running freezing cold. I think I...