problems in the U.K. are primarily with houses that had fibre pumped in the cavity.
Beads are a better job as they fill the cavity properly provided there is a minimum gap of 50mm
Brick fronts can only be pumped in areas which are not exposed to wind driven rain i.e coastal or houses on a height and exposed
Hello,
We got the beads pumped into our walls several years ago... and I would not recommend it.
Firstly, I do not believe that they have made any significant impact on the heat retention throughout our house.
Secondly, they are messy... every time there is any sort of wind, they start appearing all over the place. They come through every hole in the wall, all of the airvents, where there are extractor fans, at the boiler, where the gas and electricity meter is on the outside of the house etc. This is happening to more than just be by the way, I know of another household who has the same problem.
I would strongly recommend looking for an alternative solution, if heat retention is what your after.
Sounds like adhesive wasn't put in with your beads mr earl...
Yeah, some of the earlier providers didn't use bonded beads.
I'd wonder how effective the proposed removal of fibre insulation from a cavity could be...
Some builders I know swear by the fibre insulation and I myself have seen and been in houses done with both. Be very tempted to go with fibre and an awful lot of critisism seems to be given by people based on assumption. Can someone please give the link which proves the fibre is not good or, the bead is very good, or whatever? Thanks.
The 'removers' say they can take out all the old insulation and then show the empty cavaties with a thermal camera before re-pumping with bead. I'd love to hear from someone who's had it done.
After Leo's advice on the sagging of some types of insulation in walls I decided to make more enquiries about this and other aspects of cavity wall insulation, my goodness do opinions vary. It seems there's for and against everything and every type of material, with a lot of very knowledgeable people saying there should be no cavity insulation at all, preference being to externally insulate houses if one can afford it. The beads and glue used don't always last as moisture breaks down the glue and also there's a substance in the glue that can interact negatively with electric cables, etc, plus other drawbacks. The blown in fibre insulation I saw being pumped in and naturally enough all went well, the interesting thing was the builder brought me to a house he owned which was getting a makeover. It had been pumped with fibre insulation in 2005 in all 4 walls and he had bored holes in quite a few places, in corners and on the middle of walls, etc, about 2 ft from the wall plates, all round the house and it was packed with insulation. I asked him to do a few holes nearer the top of walls and none had sagging. I must say, I was impressed. Now, I didn't see this done with beads but this builder (friend) told me he had problems in the past with beads and glue v moisture plus the aforementioned electrical reaction and that's why i'd be going with fibre if choosing. Asked him about the aeroboard insulation with ties and he said no blocklayer likes using it and all cut corners (literally) that there'll always be places where it will be left out and no one will ever see it, he would never, never, use it. For what it's worth that's my tuppence worth and all this was in the west of Ireland, Co Galway, but not beside the sea, exposed enough though, I suppose you could say an average looking 2 storey house, but a large one (3000 sq ft). A day well spent.
That's another angle of it and an important one, I was only mentioning the sagging, etc.For me there was very little improvement with the mineral wool (fibre).
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