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Subject Topic: B.Gas - Cav. Wall Insulation Post Reply Post New Topic
11/2/2013 at 5:10pm
 Location: Preston
 Outfit: Outwell Arkansas 5
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Having decided to take up the free offer from British Gas back in October 2012 , 4 months later I am still waiting for a scaffold contractor to come round and give me a price to erect scaffolding over my garage which is required to do the installation.

Has anybody else had cavity wall injsulation done by British Gas and had long delays?

When I ring up I just get told that somebody will be in touch. I know its free but so far the service has been poor.



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Maisie & T



11/2/2013 at 5:23pm
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A word of caution with cavity insulation, I would presume a surveyor or similar has put the camera into the cavity in several places to determine suitability for this.
There has been a few threads on here over the years about problems with condensation after getting cavity insulation as it severely restricts the breathability of the house, not all but in a lot of cases,

The cavity is there for a reason.

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It is a wise man who has something to say.
It is a fool who has to say something.


11/2/2013 at 6:34pm
 Location:  Wales
 Outfit:  Volvo XC60 R Design
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We've had cavity wall insulation for years. Polystyrene beads blown in with adhesive to make a humungous tile. Never had any condensation problems and the house was much warmer after.

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73 going on 25
Beauty is in the eye of the beerholder



11/2/2013 at 8:15pm
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we had it done 2 years ago and it was the best thing, no condensation and now its a wool type product. house now stays warmer. before it was always cold its a dormer type.

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keep on moving


11/2/2013 at 8:50pm
 Location: wirral
 Outfit: Outwell Nevada m Vango sigma 300
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We had ours done, a couple of years ago.  Havn't noticed any significant difference to be honest.

I think it is because, when we had our windows done.  The window frames hide large holes.

heath63



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New Year: Hesketh Bank
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13/2/2013 at 9:43am
 Location: east midlands
 Outfit: swift 530
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We have the bead type and have had condensation problems in the loft for which we have added extra vented ridge tiles.

 

To be honest thought the house is so much warmer it was worth it.



13/2/2013 at 12:56pm
 Location: West country
 Outfit: VW camper
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We had our loft insulation boosted, it's made a great difference this winter. Highly recommend. Part of the scheme.


13/2/2013 at 4:02pm
 Location: Yeadon Leeds!
 Outfit: Swift Challenger & Defender 110SW
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scaffold?? are you 3 storys? the bloke that did mine did it off a ladder (same free BG stuff done by millers) its only climb up, drill hole, shove in blower, done.

made big difference, most noticable in my little girls room where she has 2 outside walls.

one work of warning, make sure any flue you have for your boiler etc is sealed round it, mine wasnt on the inside (no safety issue) so when they insulated it filled the boiler with insulation, which then promptly overheated and broke down, got it sorted eventually.

also make sure the know of any vents you want to keep, mine didnt even ask, just sealed the external air brick up with silicon, but I had an extractor on the inside, had to get them back to fit a liner to the hole.


18/2/2013 at 1:30am
 Location: Kent
 Outfit: None Entered
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shop around with other energy companies, we were paid to have ours installed.

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"He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion." In memory of Bear. 06/03/06 - 25/01/12 Izzie 23/09/07 - 25/03/13


18/2/2013 at 5:17pm
 Location: Wigan
 Outfit: Royal Pescara 8
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No problems getting the work done but huge problems getting the certificate to say its been done. Oh is currently sat with me, on the phone trying once again to get through to someone to send it out, we've only been waiting a year.

 

And yes, we now have condensation problems, but it has made a difference during the winter. It's not been as cold.



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2* Camper soon to be a 3!

Got me an areobed so I'm off camping!!

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19/2/2013 at 3:00pm
 Location: Yeadon Leeds!
 Outfit: Swift Challenger & Defender 110SW
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Condensation is caused by lack of ventilation, not from cavity wall insulation.
Check the vents you have, make sure they are not blocked up, and check they changed the air bricks for plastic tunnel type ones.

Condensation is caused by warm damp air hitting a cold wall, the insulation makes the wall warmer, so should reduce condensation.


19/2/2013 at 4:05pm
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There are different trains of thought on cavity wall insulation.
The cavity is there to allow air to circulate through the cavity supposedly helping to dry any moisture and help prevent it from transfering into the inner second (inside) wall and also should vent upwards airiating the loft space, thats why you are told not to cover the cavity with loft insulation.

The wall ties in the cavity have a twist in the middle to also prevent moisture transfer from outside wall to inside wall.

Modern kit houses which most are nowadays basically have a wooden frame covered with a moisture barrier and then a single skin of brick.

I am not a bricklayer but did have a small building business for 15 years and that is how it was explained to me by a timeserved bricklayer.
Maybe thoughts on this and insulating materials have have changed on this over the years but I have seen the downside of insulation regarding dampness in the past.

I stand corrected if thats the case nowadays.


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It is a wise man who has something to say.
It is a fool who has to say something.


19/2/2013 at 6:52pm
 Location: Staffordshire
 Outfit: Freelander 2 2.2GS
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We had ours done for free under the government scheme last year and have had real problems ever since.   The loft was also insulated as part of the deal and has been dripping with condensation...never a problem before the insulation was installed.

I have since looked into this in some detail (also see my thread on this forum) and it would appear to be a common problem.   We are now waiting for the roofer to install vented tiles on the roof to provide additional ventilation and hopefully, cure the problem.

Our house wasn't cold or hard to heat, being less than 30 years old, and we already had good quality double glazing and well fitted doors, so any saving on heating costs won't be massive...that free insulation is actually costing us quite a bit in having to have the additional ventilation into the loft space.

If I could have it removed for free, I would.




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