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Wet rafters and condensation

Discussion in 'Floors, Stairs and Lofts' started by Caws, 2 Dec 2019 at 9:09 AM.

  1. jonbey

    jonbey

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    does anybody think it is worthwhile putting a vapour barrier under insulation to reduce moisture getting up?
     
  2. Caws

    Caws

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    Does it matter that other houses in our street have more frost than us on their roofs? Does this mean we're losing a lot of heat?
     
  3. JohnD

    JohnD

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    Yes.

    Improve your loft insulation.

    I recommend the mineral wool rolls treated with Ecose, which do nor shed irritant dust and fibres. They are brown, not yellow. You may find special offers.
     
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  4. datarebal

    datarebal

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    Does the extractor, Extract to the outside?
     
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  5. Leofric

    Leofric

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    If you don't mind the electricity bill and possibly burning out the fan motor :D
     
  6. Caws

    Caws

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    Yes
     
  7. JohnD

    JohnD

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    A typical 10W domestic bathroom fan will run for 100 hours on 15p worth of electricity.

    That over four days, night and day, 24 hours a day.

    25 pence for a continuous week.

    Some good ones are only 8W.
    https://www.tlc-direct.co.uk/Products/SLS100CRZ.html
    20 pence for a week.

    Fan motors, by amazing chance, have a cooling airflow all the time they are running. I'd be interested to see one that has "burned out" though I have no great hopes in that direction.
     
  8. datarebal

    datarebal

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    increase your insulation, vent the loft space and adopt a life style change...do not dry on your rads
     
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  9. Leofric

    Leofric

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    OK, let's all leave our bathroom and ensuite lights and extract fans on permanently then.
     
  10. JohnD

    JohnD

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    if there is some reason why it might be necessary, feel free. For example if you are a person who has built up damp in the fabric of your bathroom, or if your family has numerous steamy showers a day and it needs drying out. What will you gain from leaving an LED lamp on?

    You expressed a concern about the electricity bill. If you're that hard up, I will post you 20p to help with your first week.

    How does it compare with boiling your kettle, full, twice a day? Or running your tumbledrier for three hours a week?
     
  11. Leofric

    Leofric

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    I don't have a tumbledrier ;). Have I been brainwashed into thinking it is a good idea to switch off all electrical things if possible to save money etc ,think green .
    :confused: the light operates the fan :!:
    Where is this going ,perhaps I should leave the sarcasm to others on here who are much better at it than me :?::!:
    ps isn't everybody concerned about their electricity bill :?: but post me as much money as you like.(y)
     
  12. Caws

    Caws

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    It's the drying that's a problem for me. I don't have a tumble dryer hence the drying in the house over the winter. I guess the extractor fan being left on is the only option for us.
     
  13. foxhole

    foxhole

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    Cost of using a fan in bathroom is negligible compared with the cost of damage by condensation, mould etc .
     
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  14. Leofric

    Leofric

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    Don't tell my family or I will never get them to switch anything off .
     
  15. Caws

    Caws

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    I feel your pain!
     
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