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.
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.
Compared to an uninsulated wall maybe, but the O/P was talking about a wall that already has slab insulation.
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.
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-)
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.
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.
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.
He said "our development" which most people seem to have interpreted as including his house as well as the neighbours.
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.
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