Our development was built in 1988 and the walls are cavity with the usual
slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled (8:00
this morning) and stuff being injected down a flexible hose. Will this be an
advantage? Will take a drive around the corner soon in the hope of seeing
the van to establish what is being used.

Any views?

"John" wrote in message
...
Our development was built in 1988 and the walls are cavity with the usual
slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled (8:00
this morning) and stuff being injected down a flexible hose. Will this be
an advantage? Will take a drive around the corner soon in the hope of
seeing the van to establish what is being used.

Any views?



It is probably recycled plastic bottles.. they make a plastic wool.
It will reduce the heat lost through the walls by about 80%.
This will typically save him 25%-40% of the heating fuel.
It saves more than insulating the loft but usually costs more.
In these days of subsidies it is well worth doing.

dennis@home wrote:


"John" wrote in message
...
Our development was built in 1988 and the walls are cavity with the
usual slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled
(8:00 this morning) and stuff being injected down a flexible hose.
Will this be an advantage? Will take a drive around the corner soon in
the hope of seeing the van to establish what is being used.

Any views?



It is probably recycled plastic bottles.. they make a plastic wool.
It will reduce the heat lost through the walls by about 80%.
This will typically save him 25%-40% of the heating fuel.
It saves more than insulating the loft but usually costs more.
In these days of subsidies it is well worth doing.

But the wall already has cavity insulation.

On 5 June, 08:23, "John" wrote:
Our development was built in 1988 and the walls are cavity with the usual
slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled (8:00
this morning) and stuff being injected down a flexible hose. Will this be an
advantage? Will take a drive around the corner soon in the hope of seeing
the van to establish what is being used.

Any views?

When you say "our development" do you mean your property, or does
"out" include you and your neighbour? i.e. are you suggesting the
neighbour will have yellow insulation batts too, and is also
ignorantly putting in some pumped insulation ?
Simon.

dennis@home wrote:


It is probably recycled plastic bottles.. they make a plastic wool.
It will reduce the heat lost through the walls by about 80%.

Compared to an uninsulated wall maybe, but the O/P was talking about a
wall that already has slab insulation.

On Jun 5, 8:23*am, "John" wrote:
Our development was built in 1988 and the walls are cavity with the usual
slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled (8:00
this morning) and stuff being injected down a flexible hose. Will this be an
advantage? Will take a drive around the corner soon in the hope of seeing
the van to establish what is being used.

Any views?

Are you sure your walls have insulation slabs?

I thought our house, built in the mid 1990s, had cavity wall
insulation but a survey revealed that the builder had got away with
using insulated block walls and dab on plasterboard to meet the regs
at that time.

Most people on our estate have now had the walls insulated with pumped
fibre and I must admit we have noticed a significant difference in the
heating bills this winter.

On Fri, 5 Jun 2009 09:05:00 +0100, dennis@home wrote:

Our development was built in 1988 and the walls are cavity with the
usual slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled
(8:00 this morning) and stuff being injected down a flexible hose.

It is probably recycled plastic bottles.. they make a plastic wool.
It will reduce the heat lost through the walls by about 80%.

Read wot is wrote Dennis. In theory the cavity is already insulated...

I agree that adding insulation to a cavity wall without it is a good thing
but seems a bit pointless/difficult if there is insulation already in
there. B-)

--
Cheers
Dave.

"Andy Burns" wrote in message
o.uk...
dennis@home wrote:


It is probably recycled plastic bottles.. they make a plastic wool.
It will reduce the heat lost through the walls by about 80%.

Compared to an uninsulated wall maybe, but the O/P was talking about a
wall that already has slab insulation.

No.. he said he had slab insulation.
He didn't say the person having the CWI had slab insulation.

I know that when my house was built it was available as an option.
I think I was the only one with CWI on this estate for the first 20 years.

I also know of one estate where its timber framed with a cavity between the
brick and the structural frame.
The frame may have slab insulation but I didn't see any put in.
It would be possible to put blown insulation in the gap or into the frame
spaces or both.

"chudford" wrote in message
...
On Jun 5, 8:23 am, "John" wrote:
Our development was built in 1988 and the walls are cavity with the usual
slabs of yellow insulation. Inside is dry lined.

I was a bit surprised to see a neighbour having some holes drilled (8:00
this morning) and stuff being injected down a flexible hose. Will this be
an
advantage? Will take a drive around the corner soon in the hope of seeing
the van to establish what is being used.

Any views?

Are you sure your walls have insulation slabs?

I thought our house, built in the mid 1990s, had cavity wall
insulation but a survey revealed that the builder had got away with
using insulated block walls and dab on plasterboard to meet the regs
at that time.

Most people on our estate have now had the walls insulated with pumped
fibre and I must admit we have noticed a significant difference in the
heating bills this winter.

To clarify - the houses were build in the same phase by the same builder in
1987 / 8 - slabs of yellowish Rockwool stuff was used to fill the cavity. I
fail to see how stuff could be reliably blown in to supplement this existing
infill - I would guess it could just blow in against the slab and create
small patches of improved insulation.

On Fri, 5 Jun 2009 01:53:45 -0700 (PDT), chudford
wrote:



I thought our house, built in the mid 1990s, had cavity wall
insulation but a survey revealed that the builder had got away with
using insulated block walls and dab on plasterboard to meet the regs
at that time.

Most people on our estate have now had the walls insulated with pumped
fibre and I must admit we have noticed a significant difference in the
heating bills this winter.

My 20yo house is similar, with thermalite blocks for the inner skin,
then plastered.
I never thought it expensive to heat but a few weeks ago I was given
the opportunity of having the cavities filled for free so I took it.
The living room temperature hasn't gone below 17 degrees C since,
including some nights when I was away and the heating was off; the
outside temperature has been as low as 3 degrees over the same period.
Previously I would have expected a minumum internal temperature of
13-15 degrees.
Why free? Government grant to the city council because the area was
reckoned to have a high proportion of domestic heat loss. No
restrictions on it at all.

dennis@home wrote:

"Andy Burns" wrote in message
o.uk...
dennis@home wrote:

It is probably recycled plastic bottles.. they make a plastic wool.
It will reduce the heat lost through the walls by about 80%.

Compared to an uninsulated wall maybe, but the O/P was talking about a
wall that already has slab insulation.

No.. he said he had slab insulation.
He didn't say the person having the CWI had slab insulation.

He said "our development" which most people seem to have interpreted as
including his house as well as the neighbours.

On Fri, 05 Jun 2009 19:16:57 +0100, Peter Johnson wrote:

Why free? Government grant to the city council because the area was
reckoned to have a high proportion of domestic heat loss. No
restrictions on it at all.

Bah Humbug, I bet those living in places with solid walls don't get them
dry lined and insulated for free. Far to expensive compared to a single
day quick injection of fluff into a cavity. But I think the heat loss
through a solid wall will be higher than that through an uninsulated
cavity.

--
Cheers
Dave.