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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorRex
    • CommentTimeOct 9th 2021
     
    What ho one and all,

    This seems a pretty fundament question, so apologies for it benign so simple!

    Had to replace a ball valve on a rental loft tank yesterday and in removing the insulation blanket, it pretty much fell to bits.

    One of the problems I can see is that the fibre blanket is sandwiched between two pieces of sealed plastic sheet so while manoeuvring it into position, gravity causes the fibre insulation to slide down and bunch up on the bottom of the plastic bag.

    I have been searching but cannot find anything that is more or less, like a duvet where the insulation is held in 'pockets.'

    Does anything like this exist and if so, where?

    Thanks and toodle pip.
    • CommentAuthortony
    • CommentTimeOct 9th 2021
     
    Sheet insulation pinned together with kebab sticks works well.

    You can buy new cistern insulation kits, generally tied on with raffia
    • CommentAuthorRex
    • CommentTimeOct 9th 2021
     
    If you mean the black 'bin liner' bags with some insulation sandwiched in the middle, yes I know it is tied with a pathetic bit of supplied tape but the insulation tends not to stay vertical within the bin liner, while trying to get it in place. Ot that is my experience, then it slumps to the bottom of the liner.

    Hence my question, is there some kind of quilted tank insulation available. Seems not!
    • CommentAuthorDavidND
    • CommentTime4 days ago
     
    Tony's comment is by far the best way to go. It works & is very reliable
    • CommentAuthortony
    • CommentTime4 days ago
     
    Thx David 🙂
    • CommentAuthorRex
    • CommentTime4 days ago
     
    Sheet insulation, pinned together. Don't understand how this works as the tank is a rounded rectangle. Presumably, one just makes a box of the insulation around it rather than the insulation being in close contact with the tank?

    What is the insulating material? One inch polystyrene sheet of something else?
    • CommentAuthorRex
    • CommentTime4 days ago
     
    Sheet insulation, pinned together. Don't understand how this works as the tank is a rounded rectangle. Presumably, one just makes a box of the insulation around it rather than the insulation being in close contact with the tank?

    What is the insulating material? One inch polystyrene sheet of something else?
  1.  
    Rex, what tank is this?

    Is it a cold water feed tank, where you just want to stop surface condensation and freezing? Then the insulation needs to be hard against the tank, glued or pinned or taped. Thin polystyrene should do the job, or that self adhesive foil bubble wrap stuff. There's no heat to keep in.

    Is it a CH expansion tank? Then you won't get surface condensation, but the water might be slightly warm if the pipes allow convection, needs better insulation.

    Sometimes there was no loft insulation directly below the tank, to let heat from the house rise up and stop the tank freezing. Then you want to run thick insulation over the tank, of equivalent insulation value to the loft insulation, so the tank is included in the heated envelope. Building a foam board box around the tank would be a way to do this, needs to be continuous with the loft insulation.

    Edit: as it has a float valve, I assume you are not actually talking about a hot water storage cylinder? That would need thick foam insulation, thicker than they come coated with
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