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rigid foam [message #25056]

Mon, 27 March 2006 22:25

nodiak
Messages: 3
Registered: May 2009

Esquire

I have access to several 4'x 8' sheets of Johns Manville AP Foil Faced Foam Sheathing. It is 3" thick.

http://www.jm.com/insulation/building_insulation/products/bid0022_ap_foil-faced.pdf

I thought if it is similar to OC 700 series I could strip off the foil and straddle 2' x 8' pieces of it across corners. Could add fiberglass behind it too if helpful. Anyone know,or can tell from the link, if it is useful.

Don

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Re: rigid foam [message #25060 is a reply to message #25056]

Tue, 28 March 2006 10:11

Wayne Parham
Messages: 18831
Registered: January 2001

Illuminati (33rd Degree)

I didn't see any specs about sound absorption. Maybe buy a sheet and measure absorption at various frequencies.

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Re: rigid foam [message #25062 is a reply to message #25060]

Tue, 28 March 2006 10:29

nodiak
Messages: 3
Registered: May 2009

Esquire

Hi Wayne, my friend will give me all I need, which is lucky if it works. I can cut 2 pieces and try them in corners. For measuring all I have is an octave analyzer (old Audio Control D-11), I have to change out preamps to hook it up, will try to find time today or tomorrow. Will do before and after. Is there another measuring tool that is fairly cheap? (Of course just listening to any change is key.)
I will also weigh the rigid board to find lbs/ft3 as that seems to matter?
Don

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