How much insulation

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How much insulation
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Downsizer Forum Index -> Energy Efficiency and Construction/Major Projects

How much insulation do you have in your loft

None

[ 3 ]

0-50mm

[ 2 ]

51-100mm

27%

[ 10 ]

101-150mm

11%

[ 4 ]

151-200mm

25%

[ 9 ]

19%

[ 7 ]

I live in a tent and believe insulation to be for soft southerners only

[ 1 ]

Total Votes : 36

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Jb

Joined: 08 Jun 2005
Posts: 7761
Location: 91ï¿½ N

Posted: Wed Jan 30, 08 3:53 pm Post subject: How much insulation

do you have in your loft? and how much should you have? Only I notice Focus have a two for one on huge great rolls of loft insulation so that it works out as about £2 / sq m for 170mm insulation.

They also have smaller rolls (the ones that will fit between the joists) which are foil backed for more money but they would be easier to handle while installing rather than something that's about 4 foot wide.

So how much would you install? At what point does diminishing returns take over?

vegplot

Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd

Posted: Wed Jan 30, 08 3:58 pm Post subject: Re: How much insulation

JB wrote:

At what point does diminishing returns take over?

That will depend on how quickly you want pay back, the external ambient temperature and the available room you have to insulate. It's relatively easy to calculate though.

Barefoot Andrew
Downsizer Moderator

Joined: 21 Mar 2007
Posts: 22780
Location: In the 17th century

Posted: Wed Jan 30, 08 3:59 pm Post subject:

I've gone for 0-50mm, because I don't actually know.

My attic has been converted into a third bedroom (curiously, for survey purposes it's not legally a "bedroom" because it doesn't have a fire door apparently

) Anyway, the ceiling of said room is polystyrene tiling (which wouldn't be legal to fit now) and I don't what what is behind it or indeed how much space exists between it and the roof. Planning to have a poke into one at some point and find out...

A.

Northern_Lad

Joined: 13 Dec 2004
Posts: 14210
Location: Somewhere

Posted: Wed Jan 30, 08 4:00 pm Post subject:
I've got that ground-up newspaper stuff in my loft - so much more fun to fit than that nasty yellow stuff.

chez

Joined: 13 Aug 2006
Posts: 35934
Location: The Hive of the Uberbee, Quantock Hills, Somerset

Posted: Wed Jan 30, 08 4:03 pm Post subject:
We've got about four inches, so I've ticked 50-100mm. Apparently we are eligible for a £300 grant from the council to add to that, though. In our last house we had the ground-up newspaper stuff, it was great, particularly since it covered up the place where the plaster board had come away from the joists

chez

Joined: 13 Aug 2006
Posts: 35934
Location: The Hive of the Uberbee, Quantock Hills, Somerset

Posted: Wed Jan 30, 08 4:03 pm Post subject:
We've got about four inches, so I've ticked 50-100mm. Apparently we are eligible for a £300 grant from the council to add to that, though. In our last house we had the ground-up newspaper stuff, it was great, particularly since it covered up the place where the plaster board had come away from the joists

lettucewoman

Joined: 26 Sep 2006
Posts: 7834
Location: Tiptoe in the Forest!!

Posted: Wed Jan 30, 08 4:04 pm Post subject:
....haven't got a loft

Northern_Lad

Joined: 13 Dec 2004
Posts: 14210
Location: Somewhere

Posted: Wed Jan 30, 08 4:07 pm Post subject:

Chez wrote:

We've got about four inches, so I've ticked 50-100mm. Apparently we are eligible for a £300 grant from the council to add to that, though.

In our last house we had the ground-up newspaper stuff, it was great, particularly since it covered up the place where the plaster board had come away from the joists

I can get £300 worth of paper then get it! Fit it under the roll-up stuff and begin to melt. Either that, or replace your existing with paper and insulate the chickens.

chez

Joined: 13 Aug 2006
Posts: 35934
Location: The Hive of the Uberbee, Quantock Hills, Somerset

Posted: Wed Jan 30, 08 4:09 pm Post subject:

Northern_Lad wrote:

Chez wrote:

I can get £300 worth of paper then get it! Fit it under the roll-up stuff and begin to melt. Either that, or replace your existing with paper and insulate the chickens.

The chickens are already insulated with bubble wrap.

*radiates cheery smugness*

Also, I'd be worried that they'd eat the fibreglass

.

Has anyone got the sheeps wool stuff? I fancy it, but it's much more expensive. And what's the difference between that and visiting the wool-sales and buying up knackered old fleeces and shoving them in your loft?

Northern_Lad

Joined: 13 Dec 2004
Posts: 14210
Location: Somewhere

Posted: Wed Jan 30, 08 4:13 pm Post subject:

Chez wrote:

Has anyone got the sheeps wool stuff? I fancy it, but it's much more expensive. And what's the difference between that and visiting the wool-sales and buying up knackered old fleeces and shoving them in your loft?

No, but it is supposed to be good if you live in a damp area, say, oh, I don't know... Wales. It gives off heat when it gets damp (note damp, not wet).

The main difference would be the smell. Also, I think the battons are treated with flambar or similar.

sean
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 42207
Location: North Devon

Posted: Wed Jan 30, 08 4:15 pm Post subject:

Northern_Lad wrote:

It gives off heat when it gets damp (note damp, not wet).

So do Group One metals. Are they good for insulation then?

vegplot

Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd

Posted: Wed Jan 30, 08 4:16 pm Post subject:

Chez wrote:

Be careful of moth.

Northern_Lad

Joined: 13 Dec 2004
Posts: 14210
Location: Somewhere

Posted: Wed Jan 30, 08 4:20 pm Post subject:

sean wrote:

Northern_Lad wrote:

It gives off heat when it gets damp (note damp, not wet).

So do Group One metals. Are they good for insulation then?

Depends how much air they trap and how conductive whilst dry.

Silas

Joined: 29 Oct 2004
Posts: 6848
Location: Staffordshire

Posted: Wed Jan 30, 08 4:21 pm Post subject:
Err.....none

chez

Joined: 13 Aug 2006
Posts: 35934
Location: The Hive of the Uberbee, Quantock Hills, Somerset

Posted: Wed Jan 30, 08 4:22 pm Post subject:

vegplot wrote:

Chez wrote:

Be careful of moth.

With knackered old fleece? Or with the posh stuff? Or both? That was one of the things that worried me a bit. And mice. And the whole house smelling a bit like a sheep-shed.

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