How much should i have up there?
I know there is a point of diminishing returns, but if I am putting completely new insulation in the loft how much should I put in? 200mm, 250mm, 300mm 350?? 
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loft insulation
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Posted 4 months ago #
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owt over 300mm would be a waste.
Posted 4 months ago # -
270mm is recommended i think.
Posted 4 months ago # -
200mm is available at B&Q for £3 per 5.5 m2...that would decide it for me...
Posted 4 months ago # -
Given what I can see for sale it's probably going to be closer to 200mm otherwise I have to do it in 2 layers which requires a lot more time and money.
Posted 4 months ago # -
Even doubling up from the minimum 70mm to 140mm made a massive difference to our gas bills in two houses where we've done it. I now have closer to 300mm in my house as the stuff is so damned cheap.
Posted 4 months ago # -
British Gas are doing it for FREE!
Yeah, right!
Posted 4 months ago # -
I live in Denmark and also in a bungalow so the insulation alone is going to cost me about £1000. Not that cheap !
Posted 4 months ago # -
I *think* building regs recommended is now 300mm minimum (can anyone confirm, I've 370 in the back of my mind though).
We have 370 in ours as we have 100 between joists and 270 laid cross-joist on top of it. It's so cheap you might as well (here!).
Can you not import it from the UK? It's like £3 for 15m of 270mm space blanket here.
Posted 4 months ago # -
Where can you get it that cheap?
I'm looking at about £30 per roll for 150-195mm thick stuffPosted 4 months ago # -
B&Q have it in pretty much continuously from october onwards. They have it in at £3 for 3x4mx200mm rolls now in my local store. When I got mine they had apparently mis-priced it, the 3x4mx270mm rolls were marked as £7 but rang up as £3. I got a fair few of them in about 5 car journeys with roof rack installed!
Posted 4 months ago # -
At varying times all of the diy stores have an offer on. Last stuff I bought was by one get three free from wickes. States on it, not for new builds but bollix to paying 25/30 a roll from the merchants. I once fetched 65 rolls from b and q because they didn't state a maximum amount per customer in their ads!
Posted 4 months ago # -
Yeah, right!
They're doing mine for free in a couple of weeks. Something to do with government quotas they've to meet, or something.
Posted 4 months ago # -
Someone's paying for it.
Posted 4 months ago # -
B&Q were doing it for £3 a roll. I bought 4 rolls recently to top the insulation up in our loft.
There was a bloke in there at the time who was buying loads to take back over to France for the house he owns over there. He was saying that insulation in France is massively more expensive so while he was over here, he was going to get a load to take back with him.
I think around 300mm is a decent amount. I think that Edukator on here mentioned 370mm being in some government spec. recently but I think that was for those houses that don't require additional heating.
Posted 4 months ago # -
Its bulky stuff so I'd be surprised if the cost of of shipping it to Denmark would offset any savings from buying it in the UK
Posted 4 months ago # -
Someone's paying for it.
Not me. At least, not directly.
Posted 4 months ago # -
The BG offer finished on the 22nd December if you read it
I just used the B&Q stuff, cost me about £50 to put 3 layers of the stuff in our loft 2 layers of the stuff made a huge difference, not too sure whether the 3 has made much if any more...
Posted 4 months ago # -
Someone's paying for it
maybe so, but I'm not, they're doing my wall cavity insulation the same day too.Posted 4 months ago # -
Just be careful! Any pipes in the loft will be subject to a lot colder temperatures if you suddenly bung 300 mm of quilt up there! Make sure they're insulated too because after last winter a lot of people realised their mistake in a costly way!!
Posted 4 months ago # -
maybe so, but I'm not, they're doing my wall cavity insulation the same day too.
That's all tickety boo then.Posted 4 months ago # -
i got 170mm rockwool for a pound a roll inc delivery from npower recently, so 15 quid delivered for 15 rolls. bargain tastic. Just need to lay the stuff, although i'm dreading that itchy feeling
*fulfilled by build center i think.
Posted 4 months ago # -
Same here I went through npower.
Posted 4 months ago # -
iirc the £3 a roll thing was wrong and it actually went through at 1 a roll.
Posted 4 months ago # -
Thank you all for making me feel so much better about the £1000 I am apparently going to have to spend to sort my loft out which a potential of saving about £100 a year!
Posted 4 months ago # -
Thank you all for making me feel so much better about the £1000 I am apparently going to have to spend to sort my loft out which a potential of saving about £100 a year!
It's not just that 100 quid a year, is it? Think about the comfort factor too.Posted 4 months ago # -
I suppose another option is to leave the existing insulation where it is and simply roll some new over the top and see how much that helps... then I don't need to buy as much
Posted 4 months ago # -
iirc the £3 a roll thing was wrong and it actually went through at 1 a roll.
Just found my receipts frm B&Q - £3 for each "tube" containing 3 rolls of 4m, at the time priced at £7.49 per "tube".
Who's paying for it? Energy users - they're subsidised by (generally) the power industry who need to do so to offset their carbon output (some sort of government mandate I think) - their way of paying for their damage is to offer subsidy on insulation. Which means that all of those not taking up the cheap offer are paying for it (more so than those who do use it). It's a bit like the solar FIT system, if you're not doing it you're paying for it through higher bills, so you might as well if the numbers work out.
Incidentally, you'll get better effect from laying your insulation cross-joist if you can - you reduce the number of thermal bridges between the outside world and your ceilings.
I suppose another option is to leave the existing insulation where it is and simply roll some new over the top and see how much that helps... then I don't need to buy as muchThat's the obvious solution (and the one I took).
Posted 4 months ago # -
iirc the £3 a roll thing was wrong and it actually went through at 1 a roll.
i should have said CK that related specifically to the npower deal at the time i used it
i would also leave existing stuff there and lay over the top.
Posted 4 months ago # -
I just got in touch with someone who will deliver it cheaply as they often come here from the UK with an empty truck. Result
Bring on the £3 per roll insulation for a 91% saving Posted 4 months ago # -
You could flog it on at that rate and make it a business.
Posted 4 months ago # -
coffeeking - Member
You could flog it on at that rate and make it a business.The bloke I mentioned above taking it back to France for his house was thinking of doing the same.
I think he had a 4x4 with a big Ifor Williams trailer he was going to use (he was one of these blokes who wants the world to know what a great saving he has made and what a great plan he has).Posted 4 months ago # -
So many mis-informations
http://www.diy.com/nav/build/insulation/loft-insulation/triple_roll/Knauf-Saver-Value-Triple-Loft-Insulation-200mm-11127503the £3 a roll thing at B&Q is right I bought a load over the xmas holidays.
I layed between the joists then topped up over the top in the opposite direction to the joists. overall there is now 400mm of insulation in the attic.
I'm currently in the process of using the same insulation under the floorboards on the first floor. The two rooms I've done have made a massive difference interms of heat retained in the rooms below and the first floor room.
at £3 is seems silly not to, I've just got the front room, the bathroom and the landing to do.Posted 4 months ago #
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