Cavity Wall Insulation
Discussion
LittleBigPlanet said:
Having cavity wall insulation done now, as I write this.
Am nervous having read this thread!
Context: 1987 4-bed detached property. Installing to ground floor only as we have tiles from there up. Confirmed through the certification authority that this is OK.
Almost certainly be fine.Am nervous having read this thread!
Context: 1987 4-bed detached property. Installing to ground floor only as we have tiles from there up. Confirmed through the certification authority that this is OK.
What are you getting it filled with?
dhutch said:
LittleBigPlanet said:
Having cavity wall insulation done now, as I write this.
Am nervous having read this thread!
Context: 1987 4-bed detached property. Installing to ground floor only as we have tiles from there up. Confirmed through the certification authority that this is OK.
Almost certainly be fine.Am nervous having read this thread!
Context: 1987 4-bed detached property. Installing to ground floor only as we have tiles from there up. Confirmed through the certification authority that this is OK.
What are you getting it filled with?
The guy has been doing this for over 25 years. Company is called Evergreen (https://www.evergreeninsulationservices.com/).
cologne2792 said:
I'd be more concerned about working with Eon.
I have never met a more utterly inept or incompetent company.
Have to agree. They came to me (and the rest of the street) and said we should have cavity insulation. Despite the fact that out of 17 houses, 16 are timber framed, they still pressed us.I have never met a more utterly inept or incompetent company.
It took my neighbour (an architect) to show them the construction literature for timber framed homes (which is the common building method in Scotland) that says you must NEVER install cavity insulation in a timber framed house. I also showed them a letter from our house insurance people advising us never to do it, Not that its necessary as all our inner walls, ceiling etc are lined with aluminium foil meaning even the attic hardly needs any extra insulation as it reflects 90% of the heat back down. And our homes were built in the mid 1970s.
grumpyscot said:
cologne2792 said:
I'd be more concerned about working with Eon.
I have never met a more utterly inept or incompetent company.
Have to agree. They came to me (and the rest of the street) and said we should have cavity insulation. Despite the fact that out of 17 houses, 16 are timber framed, they still pressed us.I have never met a more utterly inept or incompetent company.
It took my neighbour (an architect) to show them the construction literature for timber framed homes (which is the common building method in Scotland) that says you must NEVER install cavity insulation in a timber framed house. I also showed them a letter from our house insurance people advising us never to do it, Not that its necessary as all our inner walls, ceiling etc are lined with aluminium foil meaning even the attic hardly needs any extra insulation as it reflects 90% of the heat back down. And our homes were built in the mid 1970s.
I've been arguing over meter readings for several years now and it feels like you're on an endless loop.
If their 'experts' reckon something then I'd take your route and use an actual expert instead.
Bit of a bump, I never got round to getting the cavity walls insulated due to carrying out other house improvements.
Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
Tlandcruiser said:
Bit of a bump, I never got round to getting the cavity walls insulated due to carrying out other house improvements.
Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
Rewind back to Monday 3rd June 2019 Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
Tlandcruiser said:
Bit of a bump, I never got round to getting the cavity walls insulated due to carrying out other house improvements.
Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
Run far away is my only advice! Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
Bumping this as a few of the neighbours have / are having this done.
Insulation appears to be grey polystyrene balls.
Houses are circa 2004 detached build from an independent developer who seem to have a good reputation. Full height brick and thermalite block construction, vents a brick up from ground level. There are also a few small tubes that pop out just below first floor level. I assume these are to let the cavity breath?
So am i understanding the issues correctly. The air vent is there to allow the cavity to breath and dry out as the bricks may absorb moisture into the cavity? Insulation will bridge the gap between the outer and inner skin transmitting moisture?
And then you are hoping that the cavity is full height, not being blocked by mortar etc?
One observation is that our direct neighbour who had it done has a few 2” holes at first floor level where they haven’t capped following installation.
There’s a local chap who gets a little involved whenever there’s any type of construction in the area. I think he’s still a little bitter about our small road of 50 houses being built. He was smug to tell me none of the houses had been built with ‘proper’ insulation. He had just had cavity insulation installed into his 60’s brick built semi...
Is the cavity in mine like a puffer jacket. It’s the air within the cavity that keeps me warm? Or does it simply relyin the thermalite block?
Insulation appears to be grey polystyrene balls.
Houses are circa 2004 detached build from an independent developer who seem to have a good reputation. Full height brick and thermalite block construction, vents a brick up from ground level. There are also a few small tubes that pop out just below first floor level. I assume these are to let the cavity breath?
So am i understanding the issues correctly. The air vent is there to allow the cavity to breath and dry out as the bricks may absorb moisture into the cavity? Insulation will bridge the gap between the outer and inner skin transmitting moisture?
And then you are hoping that the cavity is full height, not being blocked by mortar etc?
One observation is that our direct neighbour who had it done has a few 2” holes at first floor level where they haven’t capped following installation.
There’s a local chap who gets a little involved whenever there’s any type of construction in the area. I think he’s still a little bitter about our small road of 50 houses being built. He was smug to tell me none of the houses had been built with ‘proper’ insulation. He had just had cavity insulation installed into his 60’s brick built semi...
Is the cavity in mine like a puffer jacket. It’s the air within the cavity that keeps me warm? Or does it simply relyin the thermalite block?
Edited by paultownsend on Monday 22 February 12:42
Edited by paultownsend on Monday 22 February 12:46
Edited by paultownsend on Monday 22 February 12:57
Our next door neighbor has had it blown into their house, I'm not sure on the heating cost savings because ever since they had it done the have at least 2 windows open 24/7 front and back.
Even when it's -5c outside and their boiler is going full burn puffing steam out.
Red brick 1930s house with a cavity.
I do wonder if their house now is too stuffy and humid?
Even when it's -5c outside and their boiler is going full burn puffing steam out.
Red brick 1930s house with a cavity.
I do wonder if their house now is too stuffy and humid?
How do they fill the cavity to prevent the insulation from
Blocking my air vents to my floor. I imagine in the 1960s they fitted the vent brick on the external skin, and then just laid a vent brick on the internal skin opposite the external vent. I can’t image they fitted ducts between the vent bricks in the 60s?
Blocking my air vents to my floor. I imagine in the 1960s they fitted the vent brick on the external skin, and then just laid a vent brick on the internal skin opposite the external vent. I can’t image they fitted ducts between the vent bricks in the 60s?
Tlandcruiser said:
Bit of a bump, I never got round to getting the cavity walls insulated due to carrying out other house improvements.
Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
How much are you going to save on your heating bills? Balance that against any additional maintenance requirements/standards and risk of it failing. It gets very expensive if it fails. I’ve just coughed up £3.5k to remove it. Finally the smell of damp is eliminated.Roll on to the green grant, a company called AM energy group is quoting tomorrow and they will use fibre wool blown in. Will this still be ok? Or should I use a company that will use the beads?
I am still being contacted by green home grant companies advising me to install CWI.
Impossible for me to trust any of these companies- be suspicious at all times and only choose to install if absolutely convinced there will not be a problem in years time.
Spearmansam said:
How much are you going to save on your heating bills? Balance that against any additional maintenance requirements/standards and risk of it failing. It gets very expensive if it fails. I’ve just coughed up £3.5k to remove it. Finally the smell of damp is eliminated.
I am still being contacted by green home grant companies advising me to install CWI.
Impossible for me to trust any of these companies- be suspicious at all times and only choose to install if absolutely convinced there will not be a problem in years time.
Very interesting, could you expand on the damp smell.I am still being contacted by green home grant companies advising me to install CWI.
Impossible for me to trust any of these companies- be suspicious at all times and only choose to install if absolutely convinced there will not be a problem in years time.
Was it from damp bridging along the insulation or condensation within the home?
Insulation should never really be weighed against the cost/benefit over not insulating. If it makes the house nicer to live in then just do it. The issues which are listed here, such as damp, should be taken into account as a possible negative. The house holding the heat better, reduced heating bills, and not being freezing in the mornings would be a positive etc.
Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff