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How Many Of These Would Be Needed To Cover An Area Of About 30 Sq Metres?

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sandyRoe | 14:07 Sun 20th Dec 2015 | Home & Garden
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Each one is roughly 1 sq metre, Sandy.
So, 30 needed
I get 27 (just under 30 sq metres)
30 divided by 3 divided by 0.370 = 27.027
So 28 minimum
That stuff is very expensive, Sandy.
Actually, I exaggerate..... At that price, we need to economise.

The exact number is 27
It says ''Area Of About 30 Sq Metres?'' Calibax so 29.97 is quite near ...
Question Author
£540, I suppose it would pay for itself in time. Does 30 sq mt seem about right for the 'footprint' of an average semi?
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I was thinking the 37 cm would fit between the joists without any cutting and that'd make the job a bit easier.
370mm width is designed to fit between joists at 400mm centres.
Or even in older houses where they will be at 16" centres

Do you have any insulation in there at the moment?
30 sq m does not sound enough for a semi, Sandy
2 bed?
Question Author
Sorry, I couldn't get back before now. It's 3 bedrooms but the smallest is only about 6x6, more a boxroom.
I was putting some junk into the loft(should have thrown it out) and saw there were the back of slates above my head and the top of the ceiling plaster between the joists under my feet.
There's not a piece of insulation and the bedrooms are very cold in Winter.
As far as I know the minimum recommended thickness is 270mm, so the rolls are below that at 200mm.

Might you qualify for assistance? Read through these and decide :-

http://www.energysavingtrust.org.uk/domestic/roof-and-loft

http://www.moneysavingexpert.com/utilities/free-cavity-loft-insulation

Also, if you store stuff in your loft you would tend to squash your insulation making it far less efficient.

I went through all this a couple of years ago and it's certainly made my house (3 bedroom) cosy and warm. My heating bills are also lower even though I'm getting older and have the thermostat set higher ☺☺☺

http://www.theanswerbank.co.uk/Home-and-Garden/DIY/Question1185837.html

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