Aluminium Bubble Warp

[Dibs-h]

I'm being offered some of this stuff very cheaply - bubble wrap with aluminium on both sides (sold all over the place for insulation purposes) and the thought has occurred to staple it to the inside of the rafters and then board over - or in my case ply over for scumbag resistance - anyone use the stuff or have any thoughts on it? It isn't instead of the Kingspan inbetween the rafters - in addition to.

Does it do anything or is it a gimmick?

May just have to do a u-value calc tomorrow, with and without it to see what the resulting u-values are.

Edit - might try and speak to the SE tomorrow and see what he thinks of it.

 

[Woody Alan]

I seem to recall a bit of controversy about this stuff. Along the lines of it being the best thing since sliced bread when launched. It had very high U value for low volume/thickness. I think it was then found it was the way the U value tests were done were very misleading. I'm not suggesting it is no good but not as good as we were led to believe.

Alan

 

[jasonB]

I've used the multi layer Tri-iso insulation on a couple of roofs, not sure if the bubble wrap type gives the same U-values.

One thing with fixing, after stapleing to the rafters you should counter batten so the material is not squashed along the length of the rafter thus reducing its properties, bit like this thouugh only the first set of battens are needed if fitting plasterboard/ply.

Jason