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    Polystyrene sheet insulation for timber frame walls?

    I'm insulating the walls in my period house in Suffolk. It's not listed! The walls are oak frame. Cladding is lath & plaster on both internal and external wall faces. External has also had wire mesh and some sort of render. So far I've done 2 rooms. On the first I stripped off the internal...
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    Backflow prevention

    Thanks for the information. I'm confused. How can the HW return be the last connection? I effectively have 3 x 22mm pipes from my boiler, a feed to the HW cylinder a return from the HW cylinder a feed to the radiators The rads are connected into the HW return pipe at various...
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    Backflow prevention

    Hi I had my farm house replumbed three years ago. Every summer, when I turn off the heating, I notice that the radiators still heat up when the boiler hot water circuit is on. The boiler has motorised valves on the separate h/w and heating feed, but both circuits share a common return...
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