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PostPosted: Wed Oct 11, 2017 12:59 pm 
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Hi Folks,

our house has 150mm deep rafters with sarking on top.

Our architect has specd 150mm insulation between and 37.5mm plasterboard & insulation on top of that over the rafters.

He seemed to have no issue with using 100mm then 50mm (celotex sheet or similar) on top of each other to fill the rafter void, can anyone see any issues with this? (there will be no air gaps as agreed between building control and our acrchitect - we are using breathable membrane).

What is the most cost effective route - especially when cutting the material as none of our rafters seem to run parallel to each other!!

Finally any cheap suppliers out there for insulation?


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PostPosted: Wed Oct 11, 2017 2:26 pm 
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My advice to you regarding insulation is to cut down the longer lengths of the insulation board with a blunt saw, any irregularities can be shaved off as you install each section, thereby overcoming the issue of your irregular rafters.

You can find cheap insulation on websites like http://www.insultaionforless.co.uk but you need to spend over £300 for free delivery.

Hope this helps! If you would like to find out more about what my company offers visit my website Removed Mod 2


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PostPosted: Wed Oct 11, 2017 3:47 pm 
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thanks!

was that the quickest banning ever?


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PostPosted: Wed Oct 11, 2017 5:34 pm 
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strath44 wrote:
thanks!

was that the quickest banning ever?


Not even close. :wink:


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