Insulation Advice Needed

[MopeyGecko]

With the weather turning and my first winter in my new flat approaching I'm looking at improving the insulation. There's one obvious place that looks like it can be improved shown in the gallery attached to this post. I think this must be a huge source of heat loss.

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• MopeyGecko
• 26 Nov 2013
• 1

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• MopeyGecko
• 26 Nov 2013
• 1

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• MopeyGecko
• 26 Nov 2013
• 1

I've framed out below the original single glazed skylight and intend to fit some 35mm multi-layer polycarbonate that I have managed to nab off a neighbour who just had a conservatory built.

I would also like to insulate the loft side of the plasterboard here however. My original thought was to cut some 75mm celotex or similar to fit inside the framework but as you can see the woodwork is very irregular and cutting to shape is going to be awkward. I'm currently thinking of using some 50mm mineral type cavity slabs in the framework, leaving a 25mm air gap and then wrapping the whole thing with a multi foil insulation such as superquilt. Does this sound like a good idea or can anybody suggest a better plan? I'll also be laying a second layer of mineral wool over the rest of the ceiling joists.

Thanks

Andy

 

[PrenticeBoyofDerry]

If the loft is not habitable area, no need to insulate between roof rafters, just but down about 300mm depth of mineral wool of loft floor. Try keep eaves clear at soffits, as you still want some ventilation up there.
Cavity insulation and improve double glazing will also help prevent heat loss.

 

[AronSearle]

The point of celotex is it's the same insulation for a thinner amount, as prentice says, who cares about space in the loft?

Just wack loads of mineral wool up there, cheaper, easier to fit.

One advantage of the foil faced and rigid foam materials is air does not blow through them, so at eaves, the insulation will not be compramised by cold air blowing through or under it, if you want to be fancy, you could just cut 300mm deep slabs between rafters near the eaves (remembering not to block ventillation), that you mineral wool can butt upto, this may help keep ceiling corners warmer, depending where they are in relation to the loft insulation).

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• AronSearle
• 28 Nov 2013
• 1

Blue = celotex = brown = mineral wool