John's Manville Panels --VS--- 703

akg414 · Post by **akg414** » Tue Oct 16, 2007 12:43 pm

Does anyone have any experience with John's Manville 2x4 rigid insulation panels? Is it as good as 703? Their numbers are very similar if not the same...

norton · Post by **norton** » Tue Oct 16, 2007 5:34 pm

that's your answer.

814 JM is the equivalent in just about every way to OC 703. I use the 814 all the time because the local folks who sell it are easier to get to and a bit cheaper than the local OC suppliers.

If the numbers are pretty close, the performance will be pretty close.

Good luck with the project!

akg414 · Post by **akg414** » Tue Oct 16, 2007 8:10 pm

norton wrote:that's your answer.

814 JM is the equivalent in just about every way to OC 703. I use the 814 all the time because the local folks who sell it are easier to get to and a bit cheaper than the local OC suppliers.

If the numbers are pretty close, the performance will be pretty close.

Good luck with the project!

Thanks Norton.

chetatkinsdiet · Post by **chetatkinsdiet** » Mon Oct 22, 2007 8:54 pm

I just bought and used a bunch of the fibrex brand and it worked great. About 1/2 the price of the owens corning as well.

m

versuviusx · Post by **versuviusx** » Mon Oct 22, 2007 9:20 pm

where did you get the fibrex bran and how much did it cost?

akg414 · Post by **akg414** » Tue Oct 23, 2007 4:46 am

chetatkinsdiet wrote:I just bought and used a bunch of the fibrex brand and it worked great. About 1/2 the price of the owens corning as well.

m

We need to start posting things like this! People should know that there are other options besides 703. Their prices are TOO high for insulation. That always happens: a product excels for a particular purpose, and BAM - the price goes. up.

Thanks for this...

chetatkinsdiet · Post by **chetatkinsdiet** » Tue Oct 23, 2007 9:56 am

I got it from SPI. Here's their site:
http://www.spi-co.com/index.html

They're located nationwide in larger cities. They sell every major brand of rigid fiberglass as well as other acoustical treatment products.

I don't remember the exact price, but it was around 1/2 the price of the Owens version.

m

PublicMelody · Post by **PublicMelody** » Tue Oct 23, 2007 11:14 am

I bought mine from SPI as well.

The JM product works well. Although, I can't compare to the OC.

MoreSpaceEcho · Post by **MoreSpaceEcho** » Wed Oct 24, 2007 12:15 pm

i have about a zillion dollars worth of JM 814 here, works great.

versuviusx · Post by **versuviusx** » Wed Oct 24, 2007 12:24 pm

ok so do you go to this page
http://www.spi-co.com/rfq/list_insulation.cfm

or this page:

http://www.spi-co.com/rfq/list_acoustical.cfm

akg414 · Post by **akg414** » Wed Oct 24, 2007 1:20 pm

versuviusx wrote:ok so do you go to this page
http://www.spi-co.com/rfq/list_insulation.cfm

or this page:

http://www.spi-co.com/rfq/list_acoustical.cfm

You can go to their page - or better yet, call them. If they're located close to you, just roder what you need. They're a retail store as well. So order on the phone, when it comes in, drive down and pick it up. I'm going on Friday to pick up mine!

John's Manvilee, baby - woooo-hooooo!!

trodden · Post by **trodden** » Thu Oct 25, 2007 12:10 pm

How does the JM 814 stuff compare to OC703 as far as rigidity, neatness and how well it can keep an edge?

I've used Roxul mineral wool in the past and it seems to be a bit more "floppy" than oc703 and a bit "messy" on the edge when you cut it. Its great for sound applications, but looking for other options that are a bit more "rigid" than the mineral wool.

akg414 · Post by **akg414** » Thu Oct 25, 2007 9:14 pm

trodden wrote:How does the JM 814 stuff compare to OC703 as far as rigidity, neatness and how well it can keep an edge?

I've used Roxul mineral wool in the past and it seems to be a bit more "floppy" than oc703 and a bit "messy" on the edge when you cut it. Its great for sound applications, but looking for other options that are a bit more "rigid" than the mineral wool.

Although I haven't taken it out yet, some packs have started to come apart a bit - and it seems really rigid. The edges appear to be very neat, with sharp corners. Wrapped, the packs actually feel like a solid brick.

Here's a picture:

norton · Post by **norton** » Mon Oct 29, 2007 7:16 am

If you put a piece of 814 next to a piece of 703 i don't think you'd be able to tell them apart.

It's pretty much exactly the same. And that makes sense... It's designed to be used in the same applications as 703, so i'm guessing that it would have to spec out for those applications.

Same same same same same stuff.... but it's cheaper!

wenzel.hellgren · Post by **wenzel.hellgren** » Fri Nov 02, 2007 2:18 pm

John's Manville sounds like the name of a gay bar

Message Board

John's Manville Panels --VS--- 703

John's Manville Panels --VS--- 703

Who is online