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Thread: Cavity Wall Insulation, Cost?

  
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    Cavity Wall Insulation, Cost?

    I live in a 2 bed flat and the guy below wants cavity wall insulation fitted, apparently this means I have to have it as well, so he can. I believe it is the polystyrene balls in the walls treatment.

    He says his has damp and the specialist suggested the cavity wall insulation would solve this? ... not convinced myself.

    The cost he says will be ~£150 each.

    The two flats together would be equivalent size to a 3 bed semi.

    Has anyone had this done? and does that figure quoted sound reasonable?

    Thanks,

    Neil.

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    we had ours done but it was 4 year back, had that and loft insulation done at same time so not sure what it costs - ours is a 3bed semi....

    if he has damp, he needs damp proofing done, not cavity wall insulation!
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    maybe he was led to believe the polystyrene balls would soak up the moisture?

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    Quote Originally Posted by LEE69 View Post
    maybe he was led to believe the polystyrene balls would soak up the moisture?
    maybe they would but wont get rid of it......
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    Had this done about 2months ago.

    I assumed they would use polystyrene balls, but if they get wet you'll get damp through the walls, so they don't use them anymore (i asked). The company I used filled my wall cavity up with a fibre that resembled broken down loft insulation.

    As he's the lower flat, if you don't want it, you don't need to as they will be able to fill the walls up to the level of your floor. However, IF you can have it, do so. It makes a huge difference in heat of and in the house.

    You can get a grant to subsidize the cost. I live in a 3 bed semi, would have cost around £400 without it.

    I paid £150, i reckon i'll get that back off my heating bill within 2 years.

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    Cheers for the info.

    EDIT: Ignore the post... Keif answered my question.


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    It won't solve his damp problem, but if he gets it, get it, you'll be warmer in winter.

    Plus make enquires yourself.

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    if you fill the cavity with polystyrene beads it will bridge the 2 walls and help transfer more moisture from outside wall to the inside , best its left alone if no insulation has been fitted tru the building process at the right time ; the only think you can do is to make sure that the cavity is well cross ventilated to the outside via air bricks , that will help maintain the inside wall dry and warm
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    I just found this, and it claims not to increase dampness..

    Cavity Wall insulation and dampnessCavity wall insulation does not cause dampness. Cavity walls were introduced originally to avoid the problems of dampness experienced by older solid walled dwellings. Some people think that filling the cavity (which is in effect bridging the gap between the two leaves of the cavity wall) will lead to a greater risk of dampness passing from the ‘wet’ outer leaf to the ‘dry’ inner leaf. In fact, this is not the case. The insulation repels moisture. A government sponsored independent study carried out in the mid 1990s found that filling the cavity with insulation results does not cause a greater incidence of damp problems than occur in cavity walls that have not been filled with insulation.
    http://www.staffordarea.saveyourener...WallInsulation

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    Quote Originally Posted by a.tanasan@btinternet View Post
    if you fill the cavity with polystyrene beads it will bridge the 2 walls and help transfer more moisture from outside wall to the inside , best its left alone if no insulation has been fitted tru the building process at the right time ; the only think you can do is to make sure that the cavity is well cross ventilated to the outside via air bricks , that will help maintain the inside wall dry and warm
    Best statement there.

    Needs to be ventillated and re damp proofed.

    Waste of time these polystyrene beads and expanding foam, best type is fibreglass
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