I expect that the high compression costs more. What's the
worst, if the guy's vacuum bag doesn't reexpand. He might
get tennis elbow by using a carpet beater on the fiberglass.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Frank" wrote in message
...
On 1/9/2011 11:54 AM, DerbyDad03 wrote:
When I bought a roll of R-19 fiberglass insulation the
other day, the
guy in the orange vest had to cut open a package of 6
rolls. As he cut
the plastic outer wrapping the 6 rolls expanded by a
considerable
amount...let's call it 50%, but the numbers don't really
matter.

Then when I got home and cut open my individual roll, it
expanded once
again...let's say another 50%, but again the numbers don't
matter.

That tells me that the manufacturer is quite happy to
compress the
insulation by a considerable amount for an extended period
of time.

So here's my question:

If I put the 1/3 roll that I have left in one of those
vacuum storage
bags and compress it down as far as I can, will it bounce
back to it's
full size (and R value) next month, next year, next
decade?

In other words, how long can insulation remain compressed
before it
looses it ability to perform at it's original specs?

P.S. those bags will indeed compress the insulation down
by a whole
bunch! BTDT, last night.

I wouldn't. If it were fully recoverable, the manufacturer
would have
supplied it under higher compression.