Advice on an interesting build/situation

Hi folks, We're building a shipping container control room for installation outside this unusual, acoustically beautiful anomaly. The Tank. http://tanksounds.org/ Attached photo shows the container at the end of it's initial adaptation for this task. Can anyone suggest a fabric, fire-code-acceptable, that we could put directly upon that foam? (2" Open Cell Spray Foam) We'd like to cover, especially the side walls, with easily movable panels of plywood or rock, and, pine-framed panels with simple fabric wrapped over them. Makes the space easily tunable - hard surface and porous. Simple velcro and screw system of either material, in 2' by 2' and 2' by 4' panels, makes for much flexibility. Can anyone suggest a fabric that could pass fire-code reg's w/out being toxic to folks spending long hours inside? thank you for all advice, ladies and gents. mark

Can anyone suggest a fabric that could pass fire-code reg's w/out being toxic to folks spending long hours inside?

Some of the best acoustic fabrics are made by Guildford of Maine. http://www.guilfordofmaine.com/acoustic Not sure about fire resistance, but I'd imagine that they do offer something in that line. Call them for details. You might also be interested in these threads: (Maybe you've already seen them....): http://johnlsayers.com/Pages/Spark_1.htm viewtopic.php?f=11&t=4168 viewtopic.php?f=11&t=4025&p=30206 - Stuart -