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Foil / bubble wrap insulation

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Posted by gareth on November 10, 2004, 3:53 pm
I've just bought a roll of foil / bubblewrap to use in my attic - its going
between the plasterboard and a 2ft thick stone wall. I was going to put the
shiny foil side facing in - however the instruction give a different story;

Roof insulation - foil inside unless using plasterboard then foil on
Wall - foil outside
Floor - foil on top unless using insulation then foil go's on outside.

I thought the foil would always go on the hot side - facing inside to
reflect radiant heat in?


Posted by m Ransley on November 10, 2004, 4:19 pm
Do you have an R value for the product, Ive seen  what you describe and
believe it is not worth  the expense. R 7.2" foamboard followed by R 5.5
foamboard lastly R 3.5 fiberglass are your best bets

Posted by gareth on November 10, 2004, 6:18 pm
 I don't know the exact values but it claims to be "equivalent to 55mm
Polystyrene" I know exactly what you mean about the cost, an 8m x 600mm roll
was 12. I'm using it to repair an area of the wall, at some point the gap
behind the plaster has been filled with a blown insulation. The patch I'm
working on has already been replastered but they removed the insulation
behind (or it fell out) and it was causing a cold spot with occasional
condensation during really cold spells.

Posted by Bill Wilson on November 10, 2004, 11:55 pm
 I use a foil/bubble/bubble/foil product in between the floor joists of my
I use this because I figure that there is less temptation to mice and rats
to build nests in this product compared to fiberglass.  I'm in south AL, so
it's not too cold very long............

Posted by News on November 13, 2004, 1:33 pm

Does it make any difference to the thermal performance of the house?

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